20 percent growth year-on-year over 4 years which will account for 100 percent growth on current employment figures, except in the case of the China office where employee numbers are expected to grow 500% over 3 years. All staff will use RDP for remote access, with limited terminal access to real time embedded prototypes and simulation applications housed in the R&D labs. It is assumed that the AdvanNets technical staff prefer Cisco networking equipment and as such, each router in the network is a Cisco 2811 Integrated Services Router with Ethernet and serial connectivity. All switches are Cisco Catalyst 2960 series 24-port switches. Due to the move from circuit switched telephones, VoIP phones will be provisioned for each current employee, with space allocated for future growth. AdvanNets’ ISP has allocated the public IP 203.33.45.0/24 for external use within the company where required. AdvanNets has a maximum of 4 routers, 3 within Australia and 1 within China in keeping with their agreement with the corresponding telecom agreements. Reference Architecture Reference Architecture is combining component architectures, which are a set of network functions consisting of a set of mechanisms and relationships between them. Initial Topology Sydney First Floor Consists of a number offices and cubicles for software developers, management and administrative staff. Function Description Example of mechanisms used to achieve capability Addressing/Routing A moderate amount of allocated size needed to accommodate for the equipment needed to run the developers, management and administrative staff. Addressing: allocated size of 126 Routing: Routers, routing protocols, manipulate flows
Routing: Routers, routing protocols, manipulate flows Network Management Monitoring, configuration, troubleshooting Protocols, devices Performance Of upmost importance as this is the data centre and the backbone to the company QoS, SLA, Policies Security Also of upmost importance as this would hold the whole companies backups and projects Firewalls, Security policies, ACLs Brisbane Office First Floor Is used by the technical staff. Function Description Example of mechanisms used to achieve capability Addressing/Routing Providing connectivity for technical staff Addressing: allocated size of 30 Routing: Routers, routing protocols, manipulate flows Network Management Monitoring, configuration, troubleshooting Protocols, devices Performance Must be adequate enough to meet the technical staff’s needs QoS, SLA, Policies Security Reasonable security to ensure no information is leaked Firewalls, Security policies, ACLs Second Floor Is used for administration and management staff. Function Description Example of mechanisms used
30th Floor Consists of a number of software developers and a management team. Function Description Example of mechanisms used to achieve capability Addressing/Routing Providing connectivity for software developers and the management team Addressing: allocated size of 62 Routing: Routers, routing protocols, manipulate flows Network Management Monitoring, configuration, troubleshooting Protocols, devices Performance Must be adequate enough to meet staff’s needs QoS, SLA, Policies Security Security would also be key as their projects could be confidential Firewalls, Security policies, ACLs 31st Floor Consists of a meeting room, a training/seminar room and a server room. Function Description Example of mechanisms used to achieve capability Addressing/Routing Providing connectivity for a meeting room, a training/seminar room and a server room Addressing: allocated size of 34 (14 training, 14 servers & 6 networking) Routing: Routers, routing protocols, manipulate flows Network Management Monitoring, configuration, troubleshooting Protocols, devices Performance Must be adequate enough to meet staff’s needs and enough to provide quick access to the servers QoS, SLA, Policies Security Security would also be key as their projects/training could be Firewalls, Security policies, ACLs
need to be put into place, such as a dedicated management system which will store this data at each office. This process of locally storing data ties in with the second recommendation. Migrate data between offices back into the Sydney data stores when network traffic is low such as on weekends. This will ensure that the flow of management data within AdvanNets network will not impede on the business operations and user flows. Recommendation It is recommended that AdvanNets implements a combination of in-band and out-of-band management systems to cater for their network management needs. This approach allows AdvanNets to have a high performance in-band management system; which is typically the high capacity component of network management whilst still allowing the use of out-of-band management in the even of network failures. Whilst this combination creates a redundant system which will be able to manage the data even when critical components fail, it comes with increased costs and complexity in implementation. These issues will need to be considered by AdvanNets administrators when making their decision. In addition to this, the adoption of the recommendation mentioned above in regards to controlling the flow of management data, will ensure that AdvanNets network can be continually monitored without impeding on the flow of user data and activities. References McCabe, James D., 2007, Network Analysis, Architecture and Design, 3rd edition Oppenheimer, Priscilla, 2004, Top-Down Network Design, 2nd edition, Cisco Press Appendix Assignment 1 – Andre