Patent Publication Number: US-9847672-B2

Title: System and method to improve network reliability

Description:
BACKGROUND OF INVENTION 
     Field of the Invention 
     At least one example in accordance with the present invention relates generally to the improvement of reliability of network equipment. 
     Discussion of Related Art 
     Due to the increased importance of network connectivity and the increased complexity of networks, the impact of inadvertent downtime in a network may be greater than ever. Customers commonly utilize backup power devices to provide power to network equipment (e.g., servers, routers, switches, etc.) to increase the availability of the equipment. For example, Uninterruptible Power Supplies (UPS) are commonly used to provide regulated, uninterrupted power to sensitive and/or critical loads, such as network equipment. In a typical UPS, a battery is used to provide backup power for a critical load during blackout or brownout conditions. An operator of a UPS is typically able to configure and control the UPS either through a computer coupled to the UPS or through a user interface of the UPS itself. 
     SUMMARY 
     Aspects in accord with the present invention are directed to a power device comprising an input configured to be coupled to a power source and to receive input power from the power source, power circuitry coupled to the input, a plurality of outlets, a network module configured to be coupled to a network, a controller coupled to the plurality of outlets, the power circuitry and the network module, the controller configured to operate the power circuitry to provide output power to the plurality of outlets derived from the input power, provide a management interface to a management system via the network module and the network, the management interface configured to allow an operator to provide an indication of a type of equipment coupled to each one of the plurality of outlets, and display, via the management interface, a plurality of network configuration options in a layout based on the indication of the type of equipment coupled to each one of the plurality of outlets provided by the operator. 
     According to one embodiment, the controller is further configured to display, via the management interface, a first network configuration option associated with a first one of the plurality of outlets based on the type of equipment coupled to the first one of the plurality of outlets. In one embodiment, the controller is further configured to hide, via the management interface with respect to the first one of the plurality of outlets, a second network configuration option based on the type of equipment coupled to the first one of the plurality of outlets. In another embodiment, the controller is further configured to reject control signals, with respect to the first one of the plurality of outlets, that correspond to the second network configuration option. 
     According to another embodiment, the controller is further configured to receive from an operator, via the management interface, an indication of whether each of the plurality of outlets is coupled to a network based piece of equipment or a non-network based piece of equipment. In one embodiment, in response to an indication that the first one of the plurality of outlets is coupled to a network based piece of equipment, the controller is further configured to display, via the management interface, a representation of the first network configuration option for the first one of the plurality of outlets. In another embodiment, the first network configuration option includes a rebooting feature implementation option and in response to the operator selecting, via the management interface, the rebooting feature implementation option with respect to the first one of the plurality of outlets, the controller is further configured to periodically check the status of the network, and in response to a determination that the network has failed, operate the first one of the plurality of outlets to cycle power to the network based piece of equipment. 
     According to one embodiment, in periodically checking the status of the network, the controller is configured to attempt to communicate with at least one server via the network, and in response to a determination that communication with the at least one server has failed, identify that the network as failed. In one embodiment, in attempting to communicate with the at least one server via the network, the controller is further configured to attempt to communicate with a primary server via the network, in response to a determination that communication with the primary server has failed, attempt to communicate with a secondary server via the network, and in response to a determination that communication with the secondary server has failed, identify that the network has failed. In another embodiment, in response to the operator selecting, via the management interface, the rebooting feature implementation option for the first one of the plurality of outlets, the controller is further configured to provide, via the management interface, a reboot control option, and in response to the operator selecting, via the management interface, the reboot control option, the controller is further configured to operate the first one of the plurality of outlets to cycle power to the network based piece of equipment. 
     According to another embodiment, in response to an indication that the first one of the plurality of outlets is coupled to a non-network based piece of equipment, the controller is further configured to display, via the management interface, a representation of the second network configuration option for the first one of the plurality of outlets. In one embodiment, the second network configuration option includes a timer feature implementation option and in response to the operator selecting, via the management interface, the timer feature implementation option with respect to the first one of the plurality of outlets, the controller is further configured to alternate an operational state of the first one of the plurality of outlets during a scheduled period of time. In another embodiment, the controller is further configured to receive from the operator, via the management interface, the scheduled period of time. In one embodiment, in response to an indication that the first one of the plurality of outlets is coupled to a non-network based piece of equipment, the controller is further configured to provide, via the management interface, a representation of a power control option for the first one of the plurality of outlets, and wherein in response to the operator selecting, via the management interface, the power control option, the controller is further configured to alternate an operational state of the first one of the plurality of outlets. 
     According to one embodiment, the controller is further configured to receive from the operator, via the management interface, an indication to group the first one of the plurality of outlets with a second one of the plurality of outlets, wherein upon being grouped, the controller is further configured to identify the second one of the plurality of outlets as being coupled to the same type of equipment as the first one of the plurality of outlets and to provide, via the management interface, a representation of a same one of the plurality of network configuration options to the operator for the first one of the plurality of outlets and the second one of the plurality of outlets. In one embodiment, the second one of the plurality of outlets is a static outlet, and the controller is further configured to permanently identify the static outlet as being coupled to a specific type of equipment and to permanently provide, via the management interface, one of the plurality of network configuration options to the operator with respect to the static outlet. 
     According to another embodiment, the power device further comprises a battery coupled to the power circuitry and configured to provide battery power to the power circuitry, wherein the controller is further configured to operate the power circuitry to provide output power to the plurality of outlets derived from at least one of the input power and the battery power. 
     Another aspect in accord with the present invention is directed to a method for operating a power device, the power device comprising a plurality of outlets and a controller coupled to the plurality of outlets, the method comprising providing, by the controller, a management interface to an operator, receiving, by the controller via the management interface, an indication of a type of equipment coupled to each one of the plurality of outlets, and displaying, via the management interface, a plurality of network configuration options in a layout based on the indication of the type of equipment coupled to each one of the plurality of outlets. 
     According to one embodiment, displaying includes displaying, via the management interface, a first network configuration option for each one of the plurality of outlets that is indicated as being coupled to a network based piece of equipment, and displaying, via the management interface, a second network configuration option for each one of the plurality of outlets that is indicated as being coupled to a non-network based piece of equipment. In one embodiment, the method further comprises not displaying, via the management interface, the second network configuration option for each one of the plurality of outlets that is indicated as being coupled to a network based piece of equipment, and not displaying, via the management interface, the first network configuration option for each one of the plurality of outlets that is indicated as being coupled to a non-network based piece of equipment. In another embodiment, the method further comprises blocking, with the controller, any control signals, corresponding to the second network configuration option, for any of the plurality of outlets indicated as being coupled to a network based piece of equipment, and blocking, with the controller, any control signals, corresponding to the first network configuration option, for any of the plurality of outlets indicated as being coupled to a non-network based piece of equipment. 
     According to another embodiment, displaying a first network configuration option includes displaying, via the management interface, a rebooting feature implementation option, and wherein displaying a second network configuration option includes displaying, via the management interface, a timer feature implementation option. In one embodiment, the method further comprises periodically checking status of the network in response to the operator selecting the rebooting feature implementation option with respect to a first one of the plurality of outlets, and in response to a determination that the network has failed, operating the first one of the plurality of outlets to cycle power to the network based piece of equipment coupled to the first one of the plurality of outlets. In another embodiment, the method further comprises providing, in response to the operator selecting the rebooting feature implementation option with respect to a first one of the plurality of outlets, a reboot control option, and cycling power to the network based piece of equipment coupled to the first one of the plurality of outlets in response to the operator selecting the reboot control option. In one embodiment, the method further comprises alternating an operational state of a first one of the plurality of outlets during a scheduled period of time in response to the operator selecting the timer feature implementation option with respect to the first one of the plurality of outlets. 
     According to one embodiment, the method further comprises providing, via the management interface in response to an indication that the first one of the plurality of outlets is coupled to a non-network based piece of equipment, a power control option with respect to the first one of the plurality of outlets, and alternating an operational state of the first one of the plurality of outlets in response to the operator selecting the power control option. 
     According to another embodiment, the method further comprises grouping a first one of the plurality of outlets with a second one of the plurality of outlets, and in response to grouping the first one of the plurality of outlets with the second one of the plurality of outlets, identifying the first one of the plurality of outlets as being coupled to a same type of equipment as the second one of the plurality of outlets and providing a same one of the plurality of network configuration options to both the first one of the plurality of outlets and the second one of the plurality of outlets. 
     At least one aspect in accord with the present invention is directed to a network connectivity confirmation system comprising a network access device configured to communicate, via a network, with at least one dedicated server with which the network access device has a predefined relationship, and a network monitoring device coupled to the network access device, wherein the network access device is configured to provide network access to a device in communication with the network access device, wherein the network monitoring device is configured to periodically attempt to communicate with the at least one server via the network access device and the network, and wherein in response to a determination that it cannot communicate with the at least one server, the network monitoring device is further configured to identify that the network has failed. 
     According to one embodiment, in communicating with the at least one dedicated server, the network access device is further configured to communicate, via the network, with at least one primary server with which the network access device has a predefined relationship, and communicate, via the network, with at least one secondary server with which the network access device has a predefined relationship. In one embodiment, in communicating with the at least one primary server and the at least one secondary server, the network monitoring device is configured to periodically attempt to communicate with the at least one primary server via the network access device and the network, determine whether communication with the at least one primary server is possible, in response to a determination that communication with the at least one primary server is not possible; periodically attempt to communicate with the at least one secondary server via the network access device and the network, and determine whether communication with the at least one secondary server is possible. 
     According to another embodiment, the network monitoring device is further configured to in response to a determination that communication with the at least one secondary server is possible, transmit a notification to a network manager, via the network access device, the network, and the at least one secondary server, that the at least one primary server has failed. In another embodiment, the network monitoring device is further configured to in response to a determination that communication with the at least one secondary server is possible, request, from the network manager, an assignment of a new primary server to the network access device. 
     According to one embodiment, the network monitoring device is further configured to in response to a determination that communication with the at least one secondary server is not possible, identify that the network has failed. In one embodiment, in determining whether communication with the primary server is possible, the network monitoring device is further configured to increment a primary failure counter each time a communication to the at least one primary server is unsuccessful, and determine that communication with the at least one primary server is not possible in response to the primary failure counter exceeding a primary failure threshold. In another embodiment, in determining whether communication with the at least one secondary server is possible, the network monitoring device is further configured to increment a secondary failure counter each time a communication to the at least one secondary server is unsuccessful, and determine that communication with the at least one secondary server is not possible in response to the secondary failure counter exceeding a secondary failure threshold. 
     According to another embodiment, the network connectivity confirmation system is in combination with a power device having at least one outlet, the network access device is coupled to the at least one outlet of the power device, and in response to the network monitoring device identifying that the network has failed, the network monitoring device is further configured to transmit a signal to the power device to instruct the power device to cycle power to the at least one outlet. 
     One aspect in accord with the present invention is directed to a method for identifying a status of a network, the method comprising periodically attempting, with a network monitoring device, to communicate with a primary server via a network and a network access device, determining, with the network monitoring device, whether the communication with the primary server is possible, in response to a determination that communication with the primary server is not possible, periodically attempting to communicate with a secondary server via the network access device and the network, determining whether communication with the secondary server is possible, and in response to a determination that communication with the secondary server is not possible, determining that the network has failed. 
     According to one embodiment, the method further comprises in response to a determination that communication with the secondary server is possible, transmitting a notification to a network manager, via the network access device, the network, and the secondary server, that the primary server has failed. In one embodiment, the method further comprises in response to a determination that communication with the secondary server is possible, assigning a new primary server to the network access device. 
     According to another embodiment, determining whether the communication with the primary server is possible includes incrementing a primary failure counter each time a communication to the primary server is unsuccessful, and determining that communication with the primary server is not possible in response to the primary failure counter exceeding a primary failure threshold. In one embodiment, determining whether the communication with the second server is possible includes incrementing a secondary failure counter each time a communication to the at least one secondary server is unsuccessful, and determining that communication with the at least one secondary server is not possible in response to the secondary failure counter exceeding a secondary failure threshold. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various FIGs. is represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. In the drawings: 
         FIG. 1  is a block diagram of a network system including an Uninterruptible Power Supply (UPS) system in accordance with aspects of the present invention; 
         FIG. 2A  is a screenshot view of a network configuration screen of a UPS management UI in accordance with aspects of the present invention; 
         FIG. 2B  is a screenshot view of a network configuration screen of a UPS management UI illustrating only one network configured outlet in accordance with aspects of the present invention; 
         FIG. 3A  is a screenshot view of a network configuration screen of a UPS management UI during a transition period after an operator has selected to implement the rebooting feature in multiple grouped network configured outlets in accordance with aspects of the present invention; 
         FIG. 3B  is a screenshot view of a network configuration screen of a UPS management UI during a transition period after the operator has selected to implement the rebooting feature in a single network configured outlet in accordance with aspects of the present invention; 
         FIG. 4A  is a screenshot view of a network configuration screen of a UPS management UI where only one outlet is identified as a network outlet and a rebooting feature is implemented in the network configured outlet in accordance with aspects of the present invention; 
         FIG. 4B  is a screenshot view of a network configuration screen of a UPS management UI during a transition period after a operator has selected to group two network configured outlets together in accordance with aspects of the present invention; 
         FIG. 4C  is a screenshot view of a network configuration screen of a UPS management UI during a transition period after an operator has deactivated a rebooting feature with regard to two grouped network configured outlets in accordance with aspects of the present invention; 
         FIG. 5  is a screenshot view of one embodiment of a timer selection screen in accordance with aspects of the present invention; 
         FIG. 6A  is a screenshot view of one embodiment of an outlet control screen in accordance with aspects of the present invention; 
         FIG. 6B  is a screenshot view of an outlet control screen of a UPS management UI during a transition period after the operator has initiated a command to cycle power to two grouped network configured outlets in accordance with aspects of the present invention; 
         FIG. 7A  is a screenshot view of an outlet control screen of a UPS management UI during a transition period after the operator has initiated a command to turn off a non-network configured outlet in accordance with aspects of the present invention; 
         FIG. 7B  is a screenshot view of an outlet control screen of a UPS management UI after a non-network configured outlet has been turned off in accordance with aspects of the present invention; 
         FIG. 8  is a screenshot view of another example of an outlet control screen in accordance with aspects of the present invention; 
         FIG. 9  is a block diagram of one embodiment of a network connectivity confirmation system in accordance with aspects of the present invention; 
         FIG. 10  is a flow chart illustrating one embodiment of a network connectivity confirmation process in accordance with aspects of the present invention; and 
         FIG. 11  is an example block diagram of computing components forming a system which may be configured to implement one or more aspects of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     Examples of the methods and systems discussed herein are not limited in application to the details of construction and the arrangement of components set forth in the following description or illustrated in the accompanying drawings. The methods and systems are capable of implementation in other embodiments and of being practiced or of being carried out in various ways. Examples of specific implementations are provided herein for illustrative purposes only and are not intended to be limiting. In particular, acts, components, elements and features discussed in connection with any one or more examples are not intended to be excluded from a similar role in any other examples. 
     Also, the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. Any references to examples, embodiments, components, elements or acts of the systems and methods herein referred to in the singular may also embrace embodiments including a plurality, and any references in plural to any embodiment, component, element or act herein may also embrace embodiments including only a singularity. References in the singular or plural form are not intended to limit the presently disclosed systems or methods, their components, acts, or elements. The use herein of “including,” “comprising,” “having,” “containing,” “involving,” and variations thereof is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. References to “or” may be construed as inclusive so that any terms described using “or” may indicate any of a single, more than one, and all of the described terms. In addition, in the event of inconsistent usages of terms between this document and documents incorporated herein by reference, the term usage in the incorporated references is supplementary to that of this document; for irreconcilable inconsistencies, the term usage in this document controls. 
     As discussed above, Uninterruptible Power Supplies (UPS) are commonly used to provide regulated, uninterrupted power to sensitive and/or critical loads, such as network equipment. Some conventional UPS&#39;s include outlets that are selectively configurable, by an operator, to provide different features. The control and configuration of the outlets is typically managed with a UPS management User Interface (UI) which can be accessible via a mobile application, tablet computer, desktop computer, etc. The UPS management UI can also be accessible via display on the UPS itself. Through operation of the UPS management UI, an operator can select which features are to be implemented at each one of the outlets. 
     In conventional UPS&#39;s, an operator may typically configure any outlet with any of the available features. The availability of a feature does not depend on the type of equipment that is currently plugged into the outlet. This may jeopardize the functionality or operability of equipment coupled to the UPS as some available features may only be intended for use with a specific type of equipment. For example, a timer feature automatically alternates an operational state of an outlet (e.g., turns on or off the outlet) during a scheduled period of time. Such a feature may be helpful to automatically turn off lights coupled to an outlet during the day; however, if the timer feature is implemented with an outlet coupled to important network equipment (e.g., a modem or a router), the network equipment may be turned off and the user may inadvertently lose network access. Alternatively, a rebooting feature automatically cycles power to an outlet if needed. Such a feature may be helpful to automatically cycle power to network equipment when a network connectivity issue is identified; however, if the rebooting feature is implemented with an outlet coupled to non-network equipment (e.g., a light, a phone, a display, etc.), power to the non-network equipment may be cycled inadvertently which can waste power and create user confusion (e.g., due to the non-network equipment randomly turning off and on). 
     If an operator of a UPS system does not appreciate the impact of implementing certain features with unintended types of equipment or if an operator accidently selects a feature to be implemented on an outlet coupled to an unintended piece of equipment, the availability of critical equipment (e.g., network equipment) may be jeopardized. In addition, based on the potential for selecting an inappropriate configuration, an operator of a UPS system may be hesitant to utilize all of the available features of a UPS system. 
     Embodiments described herein provide a UPS system that implements appropriate features in an outlet based on the type of equipment the outlet is protecting. The UPS system limits the features available for selection by an operator for an outlet based on the equipment type plugged into the outlet. By only displaying selectable features with respect to an outlet that are appropriate for the type of equipment plugged into the outlet, the UPS system protects operators from incorrect or accidental configurations. In addition, by hiding inappropriate features based on the equipment type plugged into the outlet, an operator may have confidence that the risk of selecting an inappropriate configuration is minimized. 
       FIG. 1  is a block diagram of a network system  100  including an Uninterruptible Power Supply (UPS) system  101  in accordance with aspects of the present invention. The UPS system  101  includes a power input  115 , power circuitry  117 , a network module  102 , a first outlet  103 , a second outlet  104 , a third outlet  105 , a controller  106 , and a battery  107 . The controller  106  is coupled to the first outlet  103 , the second outlet  104 , the third outlet  105 , and the network module  102 . The controller  106  is also coupled to the power circuitry  117 . The network module  102  is configured to be coupled to an external computing device  110  via a network  108 . The first outlet  103  is configured to be coupled to a first load  111 . The second outlet  104  is configured to be coupled to a second load  112 . The third outlet  105  is configured to be coupled to a third load  113 . The power input  115  of the UPS  101  is configured to be coupled to a power source  114 . The power circuitry  117  is coupled between the power input  115  and the outlets  103 ,  104 ,  105 . The power circuitry  117  is also coupled to the battery  107 . 
     The UPS  101  is configured to receive, at the input  115 , input power from the power source  114 . If the controller  106  determines that the input power is acceptable (e.g., at least at a desired level), the controller  106  operates the power circuitry  117  to provide desired output power to each outlet  103 ,  104 ,  105  derived from the input power. If the input power is acceptable, the controller  106  may also operate the power circuitry  117  to provide power to the battery  107  to charge the battery  107 . If the controller  106  determines that the input power is unacceptable (e.g., below the desired level), the controller  106  operates the power circuitry  117  to provide desired output power to each outlet  103 ,  104 ,  105  derived from backup power provided by the battery  107 . According to one embodiment, the power circuitry  117  includes conversion circuitry (e.g., at least one converter and/or an inverter) that is operated by the controller  106  to generate regulated output power from the input power and/or the backup power. 
     The controller  106  is configured to communicate with a management system  110  via the network module  102  and the network  108 . In one embodiment, the management system  110  is a computing device  110 . For example, in one embodiment, the computing device  110  is an operator&#39;s computer system; however, in other embodiments, the computing device  110  may be any other type of system capable of communicating with the UPS  101  (e.g., a mobile phone, tablet computer, etc.). In one embodiment, the network  108  is the Internet; however, in other embodiments, the network  108  may be any other type of Wide Area Network (WAN). According to another embodiment, the network  108  is a Local Area Network (LAN). In other embodiments, the network  108  may be any other type of network capable of facilitating communication between the UPS  101  and the computing device  110 . According to other embodiments, the controller  106  is configured to communicate with any other type of management system that is configured to provide signals to the UPS  101  to control operation of the UPS  101 . In other embodiments, the controller  106  is configured to communicate with any number of different external systems (e.g., computing devices, management systems, etc.) via the network module  102  and the network  108 . 
     The controller  106  provides a UPS management UI to the computing device  110  via the network module  102  and the network  108 . In one embodiment, the UPS management UI is displayed to an operator via a Video Display Unit (VDU)  109 . The operator can interact with the UPS management UI via an interface  121  (e.g., a keypad, touchpad, keyboard, mouse, etc.) of the computing device  110 . 
     The UPS management UI allows the operator to identify which type of equipment (e.g., network based vs. non-network based) is plugged into each outlet  103 ,  104 ,  105 . Based on the equipment identification by the operator, the UPS management UI displays selectable feature options for each outlet that are appropriate for the equipment type plugged into each outlet. The UPS management UI hides (i.e., does not display) feature options that are not appropriate for each outlet. For example, if a piece of network equipment is coupled to the first outlet  103 , the UPS management UI may display a selectable rebooting feature in relation to the first outlet  103  and hide a timer feature. Alternatively if a non-network piece of equipment is coupled to the third outlet  105 , the UPS management UI may display the timer feature and hide the rebooting feature with respect to the third outlet  105 . 
     By only showing feature options that are appropriate for each outlet and hiding options that are not appropriate, the UPS management UI simplifies the selection of an appropriate outlet configuration for the UPS  101  and minimizes the potential use of an outlet configuration that may lead to network connectivity issues. 
     According to one embodiment, the controller  106  also monitors commands input to the UPS  101  by the operator (or some other external system) and, based on the outlet configuration set by the operator, rejects or blocks incorrect or inappropriate commands. For example, if the first outlet  103  is identified by the operator as being coupled to a network device and the controller receives a command to implement a timer feature for the first outlet  103 , the controller  105  rejects the command as a timer feature cannot be implemented for a network device. Similarity, if the third outlet  105  is identified by the operator as being coupled to a non-network device and the controller receives a command to implement a rebooting feature for the third outlet  105  the controller  105  rejects the command as a rebooting feature cannot be implemented for a non-network device. 
     By rejecting incorrect or inappropriate commands based on the operator-defined configuration of the outlets, the controller  106  can minimize errors by the operator and also prevent conflicting commands from multiple different external computing devices (e.g., from multiple different operators or management systems) from leading to inappropriate operation of the UPS  101 . By rejecting commands that conflict with the operator-defined configuration of the outlets (e.g., a command to turn off a network configured outlet), the controller  106  can also provide additional network security as service attacks from an external system which are intended to shut down a network configured outlet are rejected. 
     According to one embodiment, the UPS  101  includes a mix of static and dynamic outlets. A static outlet is an outlet that is permanently configured to be coupled to a certain type of load. For example, in one embodiment, the first outlet  103  of the UPS  101  is a static outlet permanently configured to be coupled to a piece of network equipment and the third outlet  105  is a static outlet permanently configured to be coupled to a piece of non-network equipment. The second outlet  104  is a dynamic outlet which may be identified, by the operator, as being coupled to a network or non-network piece of equipment. According to other embodiments, the UPS  101  may include any number of static and/or dynamic outlets. 
     The UPS management UI automatically displays, with respect to the first static outlet  103 , selectable features appropriate for an outlet coupled to a network device and automatically displays, with respect to the third static outlet  105 , selectable features appropriate for an outlet coupled to a non-network device. The operator utilizes the UPS management UI to identify whether the second dynamic outlet  104  is coupled to a network or non-network piece of equipment. Based on the identification of the type of equipment that is coupled to the second outlet  104 , the UPS management UI automatically displays the appropriate feature options for the identified type of equipment. 
     Operation of the UPS management UI is discussed in greater detail below with reference to  FIGS. 2A-8 .  FIG. 2A  is a screenshot view of one embodiment of a network configuration screen  200  of the UPS management UI. The operator can access the network configuration screen  200  by selecting a network configuration button  201 . The network outlet selection screen  200  includes a network outlet selection area  202 . The network outlet selection area  202  includes radio buttons  204   a ,  204   b  which allow an operator to select which outlets of the UPS  101  are coupled to network equipment (i.e., are network based outlets). According to one embodiment and as shown in  FIG. 2A , the network outlet selection area  202  includes a first radio button  204   a  that allows an operator to identify the first outlet  103  and the second outlet  104  as being coupled to network equipment and a second radio button  204   b  that allows an operator to identify only the first outlet  103  as being coupled to a network device. The network outlet selection area  202  does not provide the third outlet  105  as a selectable option as the third outlet  105  is a static switch that is permanently configured to be coupled to non-network equipment (i.e., is a non-network outlet). The network outlet selection area  202  also does not allow an operator to deselect the first outlet  103  as being coupled to a network piece of equipment as the first outlet  103  is a static outlet that is permanently configured to be coupled to network equipment. 
     According to one embodiment, the UPS management UI has a default mode in which it assumes that the first outlet  103  is coupled to a first piece of network equipment (e.g., a modem) and the second outlet  104  is coupled to a second piece of network equipment (e.g., a router). In the default mode, the first radio button  204   a  in the network outlet selection area  202  is automatically selected, indicating that the first outlet  103  and the second outlet  104  are each coupled to a different piece of network equipment. The operator may also manually select the first radio button  204   a , indicating that the first outlet  103  and the second outlet  104  are each coupled to a different piece of network equipment. The operator may select the second radio button  204   b  to indicate that only the first outlet  102  is a network configured outlet.  FIG. 2B  is a screenshot view of one embodiment of the network configuration screen  200  of the UPS management UI illustrating only the first outlet  103  as being identified as a network outlet. 
     The network outlet selection screen  200  includes a network outlet feature selection area  206  that lists the selectable features that are available to be implemented in the selected network based outlets. The network outlet feature selection area  206  includes a switch  207  corresponding to each available feature that allows the operator to choose whether that feature should be implemented with the network outlets, or not. For example, as shown in  FIG. 2A , the network outlet feature selection area  206  includes a rebooting feature (i.e., “Watchdog”) that can be implemented in any of the network configured outlets. An operator may utilize the switch  207  to activate or deactivate the rebooting feature with regard to the network configured outlets. 
     When the first radio button  204   a  is selected and the first outlet  103  and the second outlet  104  are identified as each being coupled to a different piece of network equipment (as shown in  FIG. 2A ), the controller  106  groups the first and second outlets  103 ,  104  together, applies the same settings to both outlets  103 ,  104 , and displays the same selectable features for both outlets  103 ,  104 . For example, if the first radio button  204   a  is selected and the operator utilizes the switch  207  to turn on the rebooting feature, the rebooting feature is implemented in both the first outlet  103  and the second outlet  104 . Also when the first radio button  204   a  is selected, the controller  106  prevents a timer feature from being implemented in either the first outlet  104  or the second outlet  104 .  FIG. 3A  is a screenshot view of one embodiment of the network configuration screen  200  of the UPS management UI during a transition period after the operator has selected, via switch  207 , to implement the rebooting feature in the first outlet  103  and the second outlet  104 . After the rebooting feature has been implemented in the first outlet  103  and the second outlet  104 , the operator may turn off the rebooting feature by again utilizing the switch  207 . 
     When the second radio button  204   b  is selected, only the first outlet  103  is identified as being coupled to a piece of network equipment (e.g., a combined modem/router) and the second outlet  104  is identified as being coupled to piece of non-network equipment. If the second radio button  204   b  is selected after the first outlet  103  and second outlet  104  were previously grouped together, the controller  106  decouples the operation of the outlets  103 ,  104 , maintains the implementation of any previously selected network appropriate features (e.g., the rebooting feature) with the first outlet  103 , deactivates any network appropriate features with regard to the second outlet  104 , prevents any network appropriate features (e.g., a rebooting feature) from being implemented in the second outlet  104 , and prevents any non-network appropriate features (e.g., a timer) from being implement in the first outlet  103 . After the second radio button  204   b  is selected, the operator may choose to activate or deactivate any network appropriate feature with respect to the first outlet. For example, the operator may choose to activate or deactivate the rebooting feature with regard to the first outlet  103  via the switch  207 .  FIG. 3B  is a screenshot view of one embodiment of the network configuration screen  200  of the UPS management UI during a transition period after the operator has selected, via switch  207 , to implement the rebooting feature in only the first outlet  103 . After the rebooting feature has been implemented in the first outlet  103 , the operator may turn off the rebooting feature by again utilizing the switch  207 . 
     The network outlet selection screen  200  also includes a non-network feature selection area  208  that lists the current non-network based outlets based on the configuration of network outlets set by the operator. For example, as shown in  FIG. 2A , when the operator sets the first outlet  103  and the second outlet  10  as network outlets, the non-network feature selection area  208  identifies the third outlet  105  as being coupled to a non-network piece of equipment. As shown in  FIG. 2B , when the operator sets only the first outlet  103  as a network outlet, the non-network feature selection area  208  identifies the second outlet  104  and the third outlet  105  as being coupled to non-network pieces of equipment. By selecting the non-network feature selection area  208 , the operator can choose to implement non-network appropriate features (e.g., a timer) in any of the non-network configured outlets. 
     If the first radio button  204   a  is selected by the operator after the second radio button  204   b  was previously selected, the controller  106  groups the first and second outlets  103 ,  104  together, applies the same settings to both outlets  103 ,  104 , and displays the same selectable features for both outlets  103 ,  104 , as discussed above. Also, if the rebooting feature was previously selected by the operator to be implemented in the first outlet  103 , when the first outlet  103  and second outlet  104  are grouped together, the rebooting feature will also automatically implement the rebooting feature in the second outlet  104 . For example,  FIG. 4A  is a screenshot view of one embodiment of the network configuration screen  200  of the UPS management UI where only the first outlet  103  is identified as a network outlet and the rebooting feature is implemented in the first outlet  103 . The non-network feature selection area  208  lists the second outlet  104  and the third outlet  105  as non-network outlets.  FIG. 4B  is a screenshot view of one embodiment of the network configuration screen  200  of the UPS management UI during a transition period after the operator has selected the first radio button  204   a  to group the first outlet  103  and the second outlet  104  as network outlets. Once the first outlet  103  and the second outlet  104  are grouped as network outlets, only the third outlet  105  is displayed in the non-network feature selection area  208  as a non-network outlet. 
     As shown in  FIG. 4B , upon the operator selecting the first radio button  204   a , the rebooting feature, previously only implemented in the first outlet  103 , is automatically implemented in both the first outlet  103  and second outlet  104 . The rebooting feature remains implemented in the first outlet  103  and the second outlet  104  until deactivated by the operator.  FIG. 4C  is a screenshot view of one embodiment of the network configuration screen  200  of the UPS management UI during a transition period after the operator has utilized the switch  207  to deactivate the rebooting feature with regard to the first outlet  103  and the second outlet  105 . 
     As discussed above, by selecting the non-network feature selection area  208  in the network outlet selection screen  200 , the operator can choose to implement non-network appropriate features in any of the non-network configured outlets. According to one embodiment, selection of the non-network feature selection area  208  allows the operator to implement timer features for any of the non-network configured outlets. For example, if the second radio button  204   b  is selected such that the first outlet is identified as a network outlet, the second outlet  104  and the third outlet  105  are identified as non-network outlets and are displayed in the non-network feature selection area  208 . 
     Upon the user selecting the non-network feature selection area  208  including the second outlet  104  and the third outlet  105 , a timer selection screen is displayed to the operator.  FIG. 5  is a screenshot view of one embodiment of a timer selection screen  500 . The timer selection screen  500  includes a timer configuration button  502  corresponding to the second outlet  104  and a timer configuration button  504  corresponding to the third outlet  105 . By selecting the timer configuration button  502 , the operator can set a timer feature value for the second outlet  104  and by selecting the timer configuration button  504 , the operator can set a timer feature value for the third outlet  105 . The set timer feature values for each outlet determine a scheduled period of time that the operational state of the non-network outlet should be alternated (e.g., turned from on to off or off to on). According to one embodiment, the timer selection screen  500  also includes a time zone selection button  506  which, when selected by the operator, allows the operator to set an appropriate time zone for the UPS  101 . 
     Once the outlets  103 ,  104 ,  105  of the UPS  101  are configured by the operator, as discussed above, the operator can access an outlet control screen by selecting an outlet control button. The outlet control screen allows an operator to send appropriate commands to each of the outlets.  FIG. 6A  is a screenshot view of one embodiment of an outlet control screen  600 . An operator can access the outlet control screen  600  by selecting the outlet control button  601 . The outlet control screen  600  includes a network outlet control options section  602  and a non-network outlet control options section  604 . The network outlet control options section  602  includes appropriate command options for the network configured outlets and the non-network outlet control options section  604  include appropriate command options for the non-network configured outlets. 
     For example, in one embodiment as shown in  FIG. 6A , where the first outlet  103  and the second outlet  104  are grouped together as network configured outlets (as discussed above), the network outlet control options section  602  includes a listing of the network configured outlets, an identification of the features currently activated for each network outlet (e.g., a rebooting feature), and a command button  603  for initiating a command (i.e., sending a command to the controller  106 ) with regard to the networked outlets. In one embodiment where the rebooting feature has been activated with regard to both the first outlet  103  and the second outlet  104 , the command button  603  is a reboot button that, when selected by the operator, instructs the controller  106  to cycle power to the networked outlets. As the first outlet  103  and the second outlet  104  are grouped together, the same command initiated by the operator is applied to both the first outlet  103  and the second outlet  104 . Accordingly, only one reboot switch  603  is necessary as the operator can initiate a reboot command with regard to both outlets  103 ,  104  by operating the single reboot switch  603 .  FIG. 6B  is a screenshot view of one embodiment of the outlet control screen  600  of the UPS management UI during a transition period after the operator has utilized the switch  603  to initiate a command (i.e., to the controller  106 ) to cycle power to the first outlet  103  and the second outlet  105 . 
     The non-network outlet control section  604  includes a listing of the previously configured non-network outlets (as discussed above) and a command button  605  for initiating a command (i.e., sending a command to the controller  106 ) with regard to the non-networked outlets. In one embodiment, the command button  605  is a power button  605  that can be used by the operator to immediately alternate an operational state of the associated non-network outlet (e.g., turn on or off the associated outlet). For example, if the third outlet  105  is identified as a non-network outlet and the third outlet  105  is providing power to a non-network piece of equipment, the non-network outlet control section  604  displays the third outlet  105  as a non-network outlet and the power button  605  shows that the third outlet  105  is currently on. If the operator selects the power button  605 , a signal is transmitted to the controller  106  to operate the controller  106  to turn off the third outlet  105 .  FIG. 7A  is a screenshot view of one embodiment of the outlet control screen  600  of the UPS management UI during a transition period after the operator has utilized the switch  605  to initiate a command (i.e., to the controller  106 ) to turn off the third outlet  105 .  FIG. 7B  is a screenshot view of one embodiment of the outlet control screen  600  of the UPS management UI after the third outlet  105  has been turned off. Once the third outlet  105  has been turned off, the power button  605  indicates that the third outlet  105  is off. 
       FIG. 8  is a screenshot view of another embodiment of the outlet control screen  600 . If the first outlet  103  is identified as a network outlet and the second outlet  104  and third outlet  105  are identified as non-network outlets, the network outlet control options section  602  lists the first outlet  103  as a network outlet and the non-network outlet control section  604  lists the second outlet  104  and the third outlet  105  as non-network outlets. The network outlet control options section  602  also lists any currently active features (e.g., a rebooting feature) with respect to the first outlet  103  and includes the command button  603  for cycling power to the first outlet  103 . The non-network outlet control section  604  lists the second outlet  104  and the third outlet  105  as non-network outlets. The non-network outlet control section  604  also includes a first command button  605   a  for initiating a command (i.e., sending a command to the controller  106 ) with regard to the second outlet  104  and a second command button  605   b  for initiating a command with regard to the third outlet  105 . Where the command buttons  605   a ,  605   b  are power buttons, the operator can use the first command button  605   a  to turn on/off the second outlet  104  and the second command button  605   b  to turn on/off the third outlet  105 . For example, as shown in  FIG. 8 , the first command button  605   a  shows that the second outlet  104  is turned off and the second command button  605   b  shows that the third outlet  105  is turned on. 
     A summary of the available network configuration and control options with regard to the UPS  101  of  FIG. 1  is shown below in Table 1. 
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                 Settings/ 
                   
                   
                   
                   
               
               
                 Control 
                 Scenarios/options 
                 Outlet 1 
                 Outlet 2 
                 Outlet 3 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
            
               
                 Network 
                 Grouping ON for 1 + 2. 
                 Rebooting available, Timers not 
                 Timer available, no 
               
               
                 Config. 
                 Networking equipment 
                 available 
                 Rebooting 
               
               
                 Screen 
                 powered by both outlets 
               
            
           
           
               
               
               
               
               
            
               
                 (200) 
                 Grouping OFF: 
                 Rebooting available, 
                 Timer available, 
                 Timer available, no 
               
               
                   
                 Networking equipment 
                 Timer not available 
                 no Rebooting 
                 Rebooting 
               
               
                   
                 powered by outlet 1 
               
               
                   
                 only 
               
            
           
           
               
               
               
               
            
               
                 Outlet 
                 Grouping ON (1 + 2) 
                 Outlet reboot only 
                 Outlet On/Off 
               
            
           
           
               
               
               
               
               
            
               
                 Control 
                 Grouping OFF (1) 
                 Outlet reboot only 
                 Outlet On/Off 
                 Outlet On/Off 
               
               
                 Screen 
               
               
                 (600) 
               
               
                   
               
            
           
         
       
     
     As described above, the UPS  101  includes three outlets; however, in other embodiments, any number of outlets may be utilized. As also described above, the UPS  101  includes two static outlets and one dynamic outlet; however, in other embodiments, the UPS  101  may include any number of static and/or dynamic outlets. As also described above, the first outlet  103  of the UPS  101  is a static network configured outlet while the second outlet  104  is a dynamic outlet and the third outlet  105  is a static non-network configured outlet. However, in other embodiments, the configuration of the outlets may be defined in any other appropriate way. For example, where a UPS includes five outlets, any of the five outlets can be identified as a network configured outlet. For example, in one embodiment the first two outlets are identified as network configured outlets. In another embodiment, the third outlet is identified as a network configured outlet. In another embodiment, the fourth and fifth outlets are identified as network configured outlets. 
     As also described above, the management UI allows an operator to identify whether an outlet is coupled to a network based or non-network based piece of equipment and displays appropriate feature options in relation to the outlet based on whether the outlet is network or non-network based. However, in other embodiments, the management UI is configured to allow an operator to identify some other characteristic of the type of equipment coupled to an outlet and display appropriate feature options in relation to the outlet based on the identified characteristic. For example, in some other embodiments, the management UI is configured to allow an operator to identify equipment as security system equipment, network drives, printers, Network Attached Storage (NAS), or any other type of equipment that an operator would want to prevent from being inadvertently turned off. 
     As described above, a controller of a UPS provides a UI to an operator that displays appropriate selectable outlet features based on the type of equipment plugged into the outlets of the UPS. However, in other embodiments, such a system may be implemented in some other power device having outlets coupled to both network and non-network equipment. For example, in one embodiment, the controller may be located in a Power Distribution Unit (PDU) and may be configured to provide a PDU management UI to an operator that displays appropriate selectable outlet features (as discussed above) based on the type of equipment plugged into the outlets of the PDU. In another embodiment, the controller may be similarly located in other power devices such as a power strip, outlet, or any other “smart” power device. 
     As also described above, the management UI is provided to an external display of an operator; however, in other embodiments, the management UI may be provided to a display that is located on the UPS  101  itself. 
     Embodiments described herein provide a UPS system that implements appropriate features in an outlet based on the type of equipment the outlet is protecting. The UPS system limits the features available for selection by an operator for an outlet and rejects inappropriate commands sent to the outlet based on an outlet configuration defined by an operator. In allowing an operator to define the type of equipment coupled to each outlet in the UPS system, only displaying, in a UPS management UI, selectable features that are appropriate for each outlet based on the equipment identification provided by the operator, and hiding features that are not appropriate for each outlet, the UPS management UI simplifies the selection of an appropriate outlet configuration for the UPS and minimizes the potential use of an outlet configuration that may lead to network connectivity issues, confusion, or even damaged equipment. By utilizing the equipment identification provided by the operator to only display appropriate control/command options with respect to each outlet, the UPS management UI also minimizes incorrect or accidental operation of the UPS by the operator. Also, by rejecting incorrect or inappropriate commands based on the set configuration of the outlets, errors by the operator can be minimized and conflicting commands from multiple different external computing devices (e.g., from multiple different operator or management systems) can be prevented. 
     As discussed above, network appropriate features can be implemented in network configured outlets. For example, in one embodiment, a network appropriate feature is a rebooting feature (e.g., a “Watchdog” feature) that when implemented in an outlet, automatically cycles power to the outlet when a network connectivity issue is detected. In typical rebooting features, a controller coupled to network equipment attempts to connect to, or “ping”, a remote server at predetermined times. If the controller is unable to communicate with the remote server, the controller determines that there is a connectivity issue and cycles power to the network equipment. However, in such typical rebooting features, the remote server may not be dedicated to the purpose of determining network resiliency and is instead an external server utilized for a number of different functions. As such, the configuration of the non-dedicated remote server may change without notice (e.g., due to a manager of the non-dedicated remote server changing a configuration of the server). This may lead to the controller not being able to communicate with the non-dedicated remote server, even if power to the network equipment is cycled. In addition, by only attempting to communicate with a single non-dedicated remote server, the robustness of the system is limited in that if the single server is unavailable, the networking equipment may be restarted unnecessarily, impacting network connectivity. 
     Embodiments described herein provide a network connectivity confirmation system that utilizes multiple dedicated servers to confirm network connectivity. By using multiple dedicated servers, rather than a single non-dedicated server (as discussed above), the system provides enhanced network resilience. 
       FIG. 9  is a block diagram of one embodiment of a network connectivity confirmation system  900 . The system  900  includes a network access device  902 , a network monitoring device  905 , a group of primary servers  907 , a group of secondary servers  908 , and a network manager  909 . The network monitoring device  905  is coupled to the network access device  902 . The network access device  902  is configured to communicate with the group of primary servers  907  and the group of secondary servers  908  via a network  906 . In one embodiment, the network  906  is the Internet; however, in other embodiments, the network  906  may be any other type of LAN or WAN). The network manager  909  is configured to communicate with the group of secondary servers  908 . 
     The network access device  902  is a piece of network equipment (e.g., a server, router, switch, etc) that provides network  906  access to other devices  910 . According to one embodiment, the network access device  902  is a piece of network equipment that is coupled to a network configured outlet of the UPS  101  described above with regard to  FIG. 1 ; however, in other embodiments, the network access device  902  may be any other type of network access device that provides network excess to other devices and may be included within a UPS. 
     The network monitoring device  905  is configured to communicate with the network  906  via a network communication channel  903  and the network access device  902 . According to one embodiment, the network monitoring device  905  is also able to control the power that is being supplied to the network access device  902 . For example, in one embodiment, the network monitoring device  905  is located in a UPS (e.g., the UPS  101  discussed above with regard to  FIG. 1 ) to which the network access device  902  is coupled. In one embodiment, the network monitoring device  905  is located in the controller  106  of the UPS  101  or is otherwise in communication with the controller  106 ; however, in other embodiments, the network monitoring device  905  may be configured in some other appropriate way. 
     In determining the status of the network  906 , the network monitoring device  905  periodically attempts to communicate with the primary servers  907 . The primary servers are servers in which one function of the server is dedicated to determining the operational status of the network  906  (i.e., responding to inquiries from the network monitoring device  905 ). If the network monitoring device  905  is unsuccessful in communicating with one of the primary servers  907 , the network monitoring device  905  periodically attempts to communicate with the secondary servers  908 . The secondary servers  908  are also servers in which one function of the server is dedicated to determining the operational status of the network  906  (i.e., responding to the inquiries from the network monitoring device  905 ). If the network monitoring device  905  is also unsuccessful in communicating with one of the secondary servers  908 , the network monitoring device  905  identifies that there is a problem with the network  906 . Upon identifying that there is a problem with the network  906 , the network monitoring device may notify the operator, cycle power to the network access device  902 , or take some other appropriate action. 
     According to one embodiment, in communicating with the primary server(s)  907  and the secondary server(s)  908 , the network monitoring device  905  utilizes an existing connection that was established over the network  906  for a purpose other than determining network status. The existing network connection has multiple servers and fall-back procedures for ensuring that if the network  906  is functioning properly, a connection with at least one server  907 ,  908  will occur. In one embodiment, utilizing the existing connection creates a “zero-configuration” situation in which the connection “self-corrects” based on its own internal procedures. 
     Operation of the system  900  is discussed in greater detail below with regard to  FIG. 10 .  FIG. 10  is a flow chart  1000  illustrating one embodiment of a network connectivity confirmation process implemented by the system  900 . At block  1002 , the network monitoring device  905  attempts to communicate with (i.e., transmits a signal to) one of the primary servers  907  via the network access device  902  and the network  906 . According to one embodiment, the network monitoring device  905  attempts to communicate with the primary server  907  by utilizing the Transmission Control Protocol (TCP) and/or the User Datagram Protocol (UDP); however, in other embodiments, the network monitoring device  905  may utilize some other protocol to communicate with the primary server  907 . 
     At block  1004 , the network monitoring device  905  determines if it is able to communicate with the primary server  907 . In response to a determination that it is able to communicate with the primary server  907  (i.e., its transmission was successfully received by the primary server  907 ), the network monitoring device  905  determines that the network  906  is operating correctly and after a period of time, attempts to communicate with the primary server  907  again (at block  1002 ). In one embodiment, the period of time between connection attempts is configurable by the operator. According to one embodiment the connection established between the network monitoring device  905  and the primary server  907 , via the network  906  and the network access device  902 , is secure. 
     At block  1006 , in response to a determination that it is not able to communicate with the primary server  907  (i.e., its transmission as not successfully received by the primary server  907 ), the network monitoring device  905  increments a primary failure counter value. At block  1008 , the network monitoring device  905  determines if the primary failure counter value is greater than or equal to a primary failure threshold value. In one embodiment, the primary failure threshold value is ten; however, in other embodiments, the primary failure threshold value may be configured to any other value. Also, in some embodiments, the primary failure threshold value is set by the operator. In response to a determination that the primary failure counter value is less than the primary failure threshold, the network monitoring device  905  returns to block  1002  and attempts to communicate with the primary server  907 . 
     At block  1010 , in response to a determination that the primary failure counter value is at least equal to the primary failure threshold, the network monitoring device  905  attempts to communicate with (i.e., transmits a signal to) a secondary server  908  via the network access device  902  and the network  906 . According to one embodiment, the network monitoring device  905  attempts to communicate with the secondary server  908  by utilizing the Transmission Control Protocol (TCP) and/or the User Datagram Protocol (UDP); however, in other embodiments, the network monitoring device  905  may utilize some other protocol to communicate with the secondary server  908 . In one embodiment, the network monitoring device  905  attempts to communicate securely with the secondary server  908 . 
     At block  1012 , the network monitoring device  905  determines if it is able to communicate with the secondary server  908 . In response to a determination that it is able to communicate with the secondary server  908  (i.e., its transmission was successfully received), the network monitoring device  905  determines that the network  906  is operating correctly. According to one embodiment, in response to determining that the network  906  is operating correctly, the network monitoring device  905  sends a message to the network manager  909 , via the network access device  902 , the network  906 , and the secondary server  908  confirming that the secondary server  908  is working appropriate and that there may be a problem with the primary server  907 . 
     Upon receiving the message from the network monitoring device  905 , the network manager  909  may take action to investigate and/or fix the problem with the primary server  907 . For example, according to one embodiment, the message indicating the failure of the primary server  907  may also include a request by the network monitoring device  904  for the assignment of a new primary server  907  to the network access device  902 . In response to receiving such a request, the network manager  909 , at block  1016 , may assign a new primary server  907  to the network access device  902 . Upon the network access device  902  being assigned new primary server  907 , at block  1002 , the network monitoring device  905  may begin the network connection process again and attempt to communicate with the new primary server  907 . In another embodiment, the network manager  909  may automatically assign a new primary server  907  to the network access device  902  upon receiving a message that the original primary server  907  has failed and a specific request from the network monitoring device  904  is not required. According to another embodiment, the network manager  909  may not assign a new primary server  907  to the network access device  902  and, at block  1002 , the network monitoring device  905  may again attempt to communicate with the same primary server  907  that previously failed. 
     At block  1018 , in response to a determination that it is not able to communicate with the secondary server  908  (i.e., its transmission was not successfully received), the network monitoring device  905  increments a secondary failure counter value. At block  1020 , the network monitoring device  905  determines if the secondary failure counter value is greater than or equal to a secondary failure threshold value. In one embodiment, the secondary failure threshold value is ten; however, in other embodiments, the secondary failure threshold value may be configured to any other value. Also, in some embodiments, the secondary failure threshold value is set by the operator. In response to a determination that the secondary failure counter value is less than the secondary failure threshold, the network monitoring device  905  returns to block  1010  and attempts to communicate with the secondary server  908  again. 
     At block  1022 , in response to a determination that the secondary failure counter value is at least equal to the secondary failure threshold, the network monitoring device  905  determines that the network  906  has failed. At block  1024 , the network monitoring device  905  attempts to take corrective action(s) to fix the network  906 . In one embodiment, in response to determining that the network  906  has failed, the network monitoring device  905  attempts to reset the network connection. For example, the network connectivity confirmation process  1000  may be selectively implemented in a network configured outlet of the UPS  101  (shown in  FIG. 1 ) by an operator, as discussed above. Upon determining that the network  906  has failed, the network monitoring device  905  may send a command to the controller  106  to cycle power to the outlet of the UPS  101  to which the network access device  902  is coupled. In other embodiments, the network connectivity confirmation process  1000  may be implemented in a network configured outlet of another type of power device (e.g., a power strip, a smart outlet, etc.). 
     According to other embodiments, upon determining that the network  906  has failed, the network monitoring device  905  may take different corrective measures. For example, in some embodiments the network monitoring device  905  may transmit a message to the network manager  909 , may provide a message to an operator&#39;s display, or may operate some type of indicator (e.g., a light, sound generator etc.) to indicate that there is a network problem. In other embodiments, upon determining that the network  906  has failed, the network monitoring device  905  performs network analytics on the resulting data. 
     As described above, the network connectivity confirmation process  1000  is implemented in a UPS; however, in other embodiments, the network connectivity confirmation process is implemented in some other power device (e.g., a power strip, smart outlet, etc.). 
     As also described above, the network monitoring device is configured to attempt communication with the secondary server only after communication has failed with the primary server a predetermined number of times; however, in other embodiments, the network monitoring device may be configured to attempt communication with the secondary server immediately after a communication failure with the primary server. Similarly, the network monitoring device is configured to identify a network failure only after communication has failed with the secondary server a predetermined number of times; however, in other embodiments, the network monitoring device may identify a network failure immediately after a communication failure with the secondary server. 
     As described above, the network connectivity confirmation process  1000  may be selectively implemented in a network configured outlet of a power device by an operator (e.g., as discussed above with regard to  FIG. 4A ); however, in other embodiments, even though the network connectivity confirmation process  1000  is available as a selectable feature to be implemented in a network configured outlet, the operator may choose not to implement the feature in an outlet and turn the feature off with respect to one or more outlets (e.g., as discussed above with regard to  FIG. 4C ). 
     As described above, network failure is identified after communication attempts to both a dedicated primary server and a dedicated secondary server have failed; however, in at least one embodiment, a network failure may be identified after communication attempts to a single dedicated server fail. As also described above, communication is attempted with a single primary server before communication with a secondary server is attempted; however, in other embodiments, communication is attempted with multiple primary servers before communication is attempted with a secondary server. 
     Embodiments described herein provide a network connectivity confirmation system that utilizes multiple servers to confirm network connectivity. By using multiple servers, rather than a single server (as discussed above), the system provides enhanced network resilience. In addition, by utilizing at least one dedicated server having a predefined relationship with a power device such that the dedicated server won&#39;t be reconfigured without notice to the power device, potential uncontrollable errors due to server configuration changes can be minimized. Also, by utilizing multiple dedicated secure servers, the network connectivity confirmation system is less likely to be subject to a successful Distributed Denial of Service (DDoS) attack. 
       FIG. 11  illustrates an example block diagram of computing components forming a system  1100  which may be configured to implement one or more aspects disclosed herein. For example, the system  1100  may be communicatively coupled to a controller or included within a controller, and/or configured to provide a management interface to an operator or check the connectivity status of a network as discussed above. 
     The system  1100  may include for example a computing platform such as those based on Intel PENTIUM-type processor, Motorola PowerPC, Sun UltraSPARC, Texas Instruments-DSP, Hewlett-Packard PA-RISC processors, or any other type of processor. System  1100  may include specially-programmed, special-purpose hardware, for example, an application-specific integrated circuit (ASIC). Various aspects of the present disclosure may be implemented as specialized software executing on the system  1100  such as that shown in  FIG. 11 . 
     The system  1100  may include a processor/ASIC  1106  connected to one or more memory devices  1110 , such as a disk drive, memory, flash memory or other device for storing data. Memory  1110  may be used for storing programs and data during operation of the system  1100 . Components of the computer system  1100  may be coupled by an interconnection mechanism  1108 , which may include one or more buses (e.g., between components that are integrated within a same machine) and/or a network (e.g., between components that reside on separate machines). The interconnection mechanism  1108  enables communications (e.g., data, instructions) to be exchanged between components of the system  1100 . The system  1100  also includes one or more input devices  1104 , which may include for example, a keyboard or a touch screen. The system  1100  includes one or more output devices  1102 , which may include for example a display. In addition, the computer system  1100  may contain one or more interfaces (not shown) that may connect the computer system  1100  to a communication network, in addition or as an alternative to the interconnection mechanism  1108 . 
     The system  1100  may include a storage system  1112 , which may include a computer readable and/or writeable nonvolatile medium in which signals may be stored to provide a program to be executed by the processor or to provide information stored on or in the medium to be processed by the program. The medium may, for example, be a disk or flash memory and in some examples may include RAM or other non-volatile memory such as EEPROM. In some embodiments, the processor may cause data to be read from the nonvolatile medium into another memory  1110  that allows for faster access to the information by the processor/ASIC than does the medium. This memory  1110  may be a volatile, random access memory such as a dynamic random access memory (DRAM) or static memory (SRAM). It may be located in storage system  1112  or in memory system  1110 . The processor  1106  may manipulate the data within the integrated circuit memory  1110  and then copy the data to the storage  1112  after processing is completed. A variety of mechanisms are known for managing data movement between storage  1112  and the integrated circuit memory element  1110 , and the disclosure is not limited thereto. The disclosure is not limited to a particular memory system  1110  or a storage system  1112 . 
     The system  1100  may include a computer platform that is programmable using a high-level computer programming language. The system  1100  may be also implemented using specially programmed, special purpose hardware, e.g. an ASIC. The system  1100  may include a processor  1106 , which may be a commercially available processor such as the well-known Pentium class processor available from the Intel Corporation. Many other processors are available. The processor  1106  may execute an operating system which may be, for example, a Windows operating system available from the Microsoft Corporation, MAC OS System X available from Apple Computer, the Solaris Operating System available from Sun Microsystems, or UNIX and/or LINUX available from various sources. Many other operating systems may be used. 
     The processor and operating system together may form a computer platform for which application programs in high-level programming languages may be written. It should be understood that the disclosure is not limited to a particular computer system platform, processor, operating system, or network. Also, it should be apparent to those skilled in the art that the present disclosure is not limited to a specific programming language or computer system. Further, it should be appreciated that other appropriate programming languages and other appropriate computer systems could also be used. 
     Having thus described several aspects of at least one embodiment of this invention, it is to be appreciated various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be part of this disclosure, and are intended to be within the spirit and scope of the invention. Accordingly, the foregoing description and drawings are by way of example only.