Source: https://patents.google.com/patent/US8593987B2/en
Timestamp: 2019-01-16 13:00:49
Document Index: 363757109

Matched Legal Cases: ['§ 17200', '§ 17200', 'art 3', 'art 3', 'art 3', 'art 3']

US8593987B2 - System and method for providing network route redundancy across layer 2 devices - Google Patents
US8593987B2
US8593987B2 US13185885 US201113185885A US8593987B2 US 8593987 B2 US8593987 B2 US 8593987B2 US 13185885 US13185885 US 13185885 US 201113185885 A US201113185885 A US 201113185885A US 8593987 B2 US8593987 B2 US 8593987B2
US13185885
US20120008635A1 (en )
The present application claims priority from and is a continuation of U.S. Non-Provisional application Ser. No. 12/477,069, filed Jun. 2, 2009, now U.S. Pat. No. 8,014,301, issued Sep. 6, 2011, entitled SYSTEM AND METHOD FOR PROVIDING NETWORK ROUTE REDUNDANCY ACROSS LAYER 2 DEVICES, which is incorporated herein by reference in its entirety for all purposes.
U.S. Non-Provisional application Ser. No. 12/477,069 is a continuation of U.S. Non-Provisional application Ser. No. 11/695,458, filed Apr. 2, 2007, now U.S. Pat. No. 7,558,195, issued Jul. 7, 2009, entitled SYSTEM AND METHOD FOR PROVIDING NETWORK ROUTE REDUNDANCY ACROSS LAYER 2 DEVICES, which is incorporated herein by reference in its entirety for all purposes. U.S. Non-Provisional application Ser. No. 11/695,458 is a continuation of U.S. Non-Provisional application Ser. No. 10/124,449, filed Apr. 16, 2002, now U.S. Pat. No. 7,209,435, issued Apr. 24, 2007, entitled SYSTEM AND METHOD FOR PROVIDING NETWORK ROUTE REDUNDANCY ACROSS LAYER 2 DEVICES, which is incorporated herein by reference in its entirety for all purposes.
a plurality of ports for transmitting and receiving data packets; and
a non-transitory computer usable medium storing program code which, when executed, causes the network switch to:
act in concert with one or more other network switches as a virtual switch, the virtual switch providing route redundancy for a Layer 2 network, and
transmit, via a port in the plurality of ports, a control packet including a time-to-live value, the time-to-live value being decremented solely when the control packet is transferred through one of the network switches in the virtual switch.
2. The network switch of claim 1 wherein the control packet further includes an identifier identifying the virtual switch.
3. The network switch of claim 1 wherein the control packet further includes a priority value, the priority value being based on a number of live connections between the network switch and devices in the Layer 2 network.
4. The network switch of claim 1 wherein the control packet further includes a timer configured to enable synchronization between the network switch and the one or more other network switches in the virtual switch.
5. The network switch of claim 1 wherein the control packet is transmitted to the one or more other network switches in the virtual switch.
6. The network switch of claim 5 wherein the control packet is transmitted by being flooded throughout the Layer 2 network.
7. The network switch of claim 5 wherein the control packet further includes a credential that is authenticated when the control packet is received by a network switch in the virtual switch.
one or more first ports for communicatively coupling the network switch with a first network;
one or more second ports for communicatively coupling the network switch with a second network; and
act in concert with one or more other network switches as a virtual switch, the virtual switch providing route redundancy for the first network,
when operating in a first mode, forward all network data traffic received at the one or more first ports and the one or more second ports, and
when operating in a second mode, block network data traffic received at the one or more first ports and forward network data traffic received at the one or more second ports.
9. The network switch of claim 8 wherein the first network is configured to have an arbitrary topology.
10. The network switch of claim 9 wherein the second network is configured to have a ring topology.
11. The network switch of claim 10 wherein the second network is configured to use Metro Ring Protocol (MRP).
12. The network switch of claim 8 wherein the one or more second ports include a port for directly coupling the network switch with one or more other network switches in the virtual switch.
13. The network switch of claim 8 wherein the program code further causes the network switch to, when operating in the first mode, transmit one or more redundancy control packets via the one or more first ports.
14. The network switch of claim 13 wherein the program code further causes the network switch to communicate its status to the one or more other network switches via the one or more redundancy control packets.
15. The network switch of claim 14 wherein the one or more redundancy control packets are flooded throughout the first network.
16. The network switch of claim 14 wherein the program code further causes the network switch to, when operating in the second mode, allow receipt of redundancy control packets via the one or more second ports.
a memory for storing a priority value; and
transition from a first mode to a second mode upon receiving a control packet including a priority value less than the stored priority value; and
transition from the second mode to the first mode upon receiving a control packet including a priority value greater than the stored priority value.
18. The network switch of claim 17 wherein the program code further causes the network switch to, when operating in the first mode, block all network traffic received at the network switch except for control packets.
19. The network switch of claim 17 wherein the program code further causes the network switch to, when operating in the second mode, block all network traffic received at the network switch except for control packets, and to transmit one or more control packets.
20. The network switch of claim 17 wherein the program code further causes the network switch to transition from the second mode to a third mode if no control packet including a priority value greater than the stored priority value is received within a predetermined amount of time.
21. The network switch of claim 20 wherein the program code further causes the network switch to, when operating in the third mode, forward all network traffic received at the network switch, and to transmit one or more control packets.
US13185885 2002-04-16 2011-07-19 System and method for providing network route redundancy across layer 2 devices Active 2022-09-29 US8593987B2 (en)
US10124449 US7209435B1 (en) 2002-04-16 2002-04-16 System and method for providing network route redundancy across Layer 2 devices
US11695458 US7558195B1 (en) 2002-04-16 2007-04-02 System and method for providing network route redundancy across layer 2 devices
US12477069 US8014301B2 (en) 2002-04-16 2009-06-02 System and method for providing network route redundancy across layer 2 devices
US13185885 US8593987B2 (en) 2002-04-16 2011-07-19 System and method for providing network route redundancy across layer 2 devices
US14060841 US9450893B2 (en) 2002-04-16 2013-10-23 System and method for providing network route redundancy across layer 2 devices
US12477069 Continuation US8014301B2 (en) 2002-04-16 2009-06-02 System and method for providing network route redundancy across layer 2 devices
US14060841 Continuation US9450893B2 (en) 2002-04-16 2013-10-23 System and method for providing network route redundancy across layer 2 devices
US8593987B2 true US8593987B2 (en) 2013-11-26
US10124449 Active 2025-01-13 US7209435B1 (en) 2002-04-16 2002-04-16 System and method for providing network route redundancy across Layer 2 devices
US11695458 Active 2022-07-31 US7558195B1 (en) 2002-04-16 2007-04-02 System and method for providing network route redundancy across layer 2 devices
US12477069 Active 2022-09-16 US8014301B2 (en) 2002-04-16 2009-06-02 System and method for providing network route redundancy across layer 2 devices
US13185885 Active 2022-09-29 US8593987B2 (en) 2002-04-16 2011-07-19 System and method for providing network route redundancy across layer 2 devices
US14060841 Active 2023-07-16 US9450893B2 (en) 2002-04-16 2013-10-23 System and method for providing network route redundancy across layer 2 devices
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US7209435B1 (en) 2007-04-24 grant
US20090296565A1 (en) 2009-12-03 application
US20140050225A1 (en) 2014-02-20 application
US8014301B2 (en) 2011-09-06 grant
US9450893B2 (en) 2016-09-20 grant
US20120008635A1 (en) 2012-01-12 application
US7558195B1 (en) 2009-07-07 grant