Systems and methods for configuring a network to include redundant upstream connections using an upstream control protocol

• US 20080019265A1
• Filed: 07/18/2006
• Published: 01/24/2008
• Est. Priority Date: 07/18/2006
• Status: Abandoned Application

• Current Assignee: Allied Telesis Holdings KK
• Original Assignee: Allied Telesis Holdings KK
• Inventors: Srikrishna, Mayasandra, Alluisi, Paul, Sannipoli, Matt
• Application Number:
  US11/488,182
• Publication Number:
  US 20080019265A1
• Time in Patent Office: Days
• US Class Current: 370/225
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/22 Alternate routing
• CPC Class Codes: H04L 45/28 using route fault recovery

Abstract

A network includes a primary upstream node associated with a predetermined type of traffic, and a secondary upstream node that is associated with the predetermined type of traffic and is communicatively coupled to the primary upstream node. The network also includes a plurality of traffic nodes communicatively coupled to the primary upstream node and to the secondary upstream node, and each of the plurality of traffic nodes includes a plurality of ports. The primary upstream node is configured to transmit a plurality of periodic indicator messages to each of the plurality of traffic nodes and to the secondary upstream node indicating that the primary upstream node currently is operating as a master upstream node for the network with respect to the predetermined type of traffic. Moreover, for each of the plurality of traffic nodes, a port of the plurality of ports that receives a most recent one of the plurality of periodic indicator messages from the master upstream node is configured to operate as a master upstream port for the traffic node with respect to the predetermined type of traffic.

Claims

1. A network, comprising:

a primary upstream node associated with a predetermined type of traffic;

a secondary upstream node associated with the predetermined type of traffic, wherein the secondary upstream node is communicatively coupled to the primary upstream node; and

a plurality of traffic nodes communicatively coupled to the primary upstream node and to the secondary upstream node, wherein;

each of the plurality of traffic nodes comprises a plurality of ports;

the primary upstream node is configured to transmit a plurality of periodic indicator messages to each of the plurality of traffic nodes and to the secondary upstream node indicating that the primary upstream node currently is operating as a master upstream node for the network with respect to the predetermined type of traffic; and

for each of the plurality of traffic nodes, at least one port of the plurality of ports that receives a most recent one of the plurality of periodic indicator messages from the master upstream node is configured to operate as a master upstream port for the traffic node with respect to the predetermined type of traffic, wherein all packets of information that are associated with the predetermined type of traffic and that are transmitted by the traffic node are transmitted via the master upstream port.

2. The network of claim 1, wherein the master upstream node is configured to receive all packets of information within the network that are associated with the predetermined type of traffic, such that the master upstream node operates as an exit node for the network with respect to the predetermined type of traffic.

3. The network of claim 2, wherein the predetermined type of traffic is selected from the group consisting of voice traffic, video traffic, data traffic, and Internet traffic.

4. The network of claim 2, wherein the secondary upstream node is configured to transmit a plurality of periodic status messages to the primary upstream node, and when the primary upstream node fails to timely respond to a most recent one of the periodic status messages or the primary upstream node transmits a failure message to the secondary upstream node in response to the most recent one of the periodic status messages, the secondary upstream node is configured to transmit the plurality of periodic indicator messages to each of the plurality of traffic nodes indicating that the secondary upstream node currently is operating as the master upstream node for the network with respect to the predetermined type of traffic.

5. The network of claim 4, wherein when a predetermined amount of time expires after the secondary upstream node receives one of the plurality of periodic indicator messages from the primary upstream node without the secondary upstream node receiving a subsequent one of the plurality of periodic indicator messages from the primary upstream node, the secondary upstream node is configured to transmit the plurality of periodic indicator messages to each of the plurality of traffic nodes indicating that the secondary upstream node currently is operating as the master upstream node for the network with respect to the predetermined type of traffic.

6. A method of configuring a network to include redundant upstream connections, wherein the network comprises a plurality of nodes, and each of the nodes comprise a plurality of ports, the method comprising:

selecting a primary upstream node associated with a predetermined type of traffic from the plurality of nodes;

selecting a secondary upstream node associated with the predetermined type of traffic from the plurality of nodes, wherein the secondary upstream node is communicatively coupled to the primary upstream node, and a remainder of the plurality of nodes not selected as the primary upstream node or the secondary upstream node comprise a plurality of traffic nodes communicatively coupled to the primary upstream node and to the secondary upstream node;

transmitting a plurality of periodic indicator messages from the primary upstream node to each of the plurality of traffic nodes and to the secondary upstream node indicating that the primary upstream node currently is operating as a master upstream node for the network with respect to the predetermined type of traffic;

for each of the plurality of traffic nodes, designating at least one port of the plurality of ports that receives a most recent one of the plurality of periodic indicator messages from the master upstream node as a master upstream port for the traffic node with respect to the predetermined type of traffic; and

at each of the plurality of traffic nodes, transmitting all packets of information that are associated with the predetermined type of traffic via the master upstream port.

7. The method of claim 6, further comprising:

at the master upstream node, receiving all packets of information within the network that are associated with the predetermined type of traffic, such that the master upstream node operates as an exit node for the network with respect to the predetermined type of traffic.

8. The method of claim 7, wherein the predetermined type of traffic is selected from the group consisting of voice traffic, video traffic, data traffic, and Internet traffic.

9. The method of claim 7, further comprising:

at the secondary upstream node, transmitting a plurality of periodic status messages to the primary upstream node;

at the secondary upstream node, determining whether the primary upstream node failed to timely respond to a most recent one of the periodic status messages or whether the primary upstream node transmitted a failure message in response to the most recent one of the periodic status messages; and

at the secondary upstream node, transmitting the plurality of periodic indicator messages to each of the plurality of traffic nodes indicating that the secondary upstream node currently is operating as the master upstream node for the network with respect to the predetermined type of traffic when the primary upstream node fails to timely respond to the most recent one of the periodic status messages or when the primary upstream node transmitted the failure message in response to the most recent one of the periodic status messages.

10. The method of claim 9, further comprising:

at the secondary upstream node, determining whether a predetermined amount of time expired after the secondary upstream node received one of the plurality of periodic indicator messages from the primary upstream node without the secondary upstream node receiving a subsequent one of the plurality of periodic indicator messages from the primary upstream node; and

at the secondary upstream node, transmitting the plurality of periodic indicator messages to each of the plurality of traffic nodes indicating that the secondary upstream node currently is operating as the master upstream node for the network with respect to the predetermined type of traffic after the expiration of the predetermined amount of time.

11. A software arrangement, which, when executed by a processing system, is operable to configure a network to include redundant upstream connections, wherein the network comprises a plurality of nodes, and each of the nodes comprise a plurality of ports, wherein the processing system is operable to:

select a primary upstream node associated with a predetermined type of traffic from the plurality of nodes;

select a secondary upstream node associated with the predetermined type of traffic from the plurality of nodes, wherein the secondary upstream node is communicatively coupled to the primary upstream node, and a remainder of the plurality of nodes not selected as the primary upstream node or the secondary upstream node comprise a plurality of traffic nodes communicatively coupled to the primary upstream node and to the secondary upstream node;

transmit a plurality of periodic indicator messages from the primary upstream node to each of the plurality of traffic nodes and to the secondary upstream node indicating that the primary upstream node currently is operating as a master upstream node for the network with respect to the predetermined type of traffic;

for each of the plurality of traffic nodes, designate at least one port of the plurality of ports that receives a most recent one of the plurality of periodic indicator messages from the master upstream node as a master upstream port for the traffic node with respect to the predetermined type of traffic; and

at each of the plurality of traffic nodes, transmit all packets of information that are associated with the predetermined type of traffic via the master upstream port.

12. The software arrangement of claim 11, wherein the master upstream node is configured to receive all packets of information within the network that are associated with the predetermined type of traffic, such that the master upstream node operates as an exit node for the network with respect to the predetermined type of traffic.

13. The software arrangement of claim 12, wherein the predetermined type of traffic is selected from the group consisting of voice traffic, video traffic, data traffic, and Internet traffic.

14. The software arrangement of claim 12, wherein the processing arrangement is further operable to:

at the secondary upstream node, transmit a plurality of periodic status messages to the primary upstream node;

at the secondary upstream node, determine whether the primary upstream node failed to timely respond to a most recent one of the periodic status messages or whether the primary upstream node transmitted a failure message in response to the most recent one of the periodic status messages; and

at the secondary upstream node, transmit the plurality of periodic indicator messages to each of the plurality of traffic nodes indicating that the secondary upstream node currently is operating as the master upstream node for the network with respect to the predetermined type of traffic when the primary upstream node fails to timely respond to the most recent one of the periodic status messages or when the primary upstream node transmitted the failure message in response to the most recent one of the periodic status messages.

15. The software arrangement of claim 14, wherein the processing arrangement is further operable to:

at the secondary upstream node, determine whether a predetermined amount of time expired after the secondary upstream node received one of the plurality of periodic indicator messages from the primary upstream node without the secondary upstream node receiving a subsequent one of the plurality of periodic indicator messages from the primary upstream node; and

at the secondary upstream node, transmit the plurality of periodic indicator messages to each of the plurality of traffic nodes indicating that the secondary upstream node currently is operating as the master upstream node for the network with respect to the predetermined type of traffic after the expiration of the predetermined amount of time.

16. A network, comprising:

a first upstream node;

a second upstream node communicatively coupled to the first upstream node; and

a traffic node communicatively coupled to the first upstream node and to the second upstream node, wherein;

the traffic node comprises a plurality of ports;

the first upstream node is configured to transmit a plurality of periodic indicator messages to the traffic node and to the second upstream node indicating that the first upstream node currently is operating as a master upstream node for the network; and

a port of the plurality of ports that receives a most recent one of the plurality of periodic indicator messages from the master upstream node is configured to operate as a master upstream port for the traffic node.

17. The network of claim 16, wherein the master upstream node is configured to receive all packets of information within the network that are associated with a predetermined type of traffic, such that the master upstream node operates as an exit node for the network with respect to the predetermined type of traffic, and wherein all packets of information that are associated with the predetermined type of traffic and that are transmitted by the traffic node are transmitted via the master upstream port.

18. The network of claim 17, wherein the predetermined type of traffic is selected from the group consisting of voice traffic, video traffic, data traffic, and Internet traffic.

19. The network of claim 17, wherein the second upstream node is configured to transmit a plurality of periodic status messages to the first upstream node, and when the first upstream node fails to timely respond to a most recent one of the periodic status messages or the first upstream node transmits a failure message to the second upstream node in response to the most recent one of the periodic status messages, the second upstream node is configured to transmit the plurality of periodic indicator messages to the traffic node indicating that the second upstream node currently is operating as the master upstream node for the network.

20. The network of claim 19, wherein when a predetermined amount of time expires after the second upstream node receives one of the plurality of periodic indicator messages from the first upstream node without the second upstream node receiving a subsequent one of the plurality of periodic indicator messages from the first upstream node, the second upstream node is configured to transmit the plurality of periodic indicator messages to the traffic node indicating that the second upstream node currently is operating as the master upstream node for the network.

21. A network, comprising:

a master upstream node; and

a traffic node communicatively coupled to the master upstream node, wherein the traffic node comprises a plurality of ports, the master upstream node is configured to transmit a plurality of periodic messages to the traffic node, and a port of the plurality of ports that receives a most recent one of the plurality of periodic messages from the master upstream node is configured to operate as a master upstream port for the traffic node.

22. The network of claim 21, wherein the master upstream node is configured to receive all packets of information within the network that are associated with a predetermined type of traffic, such that the master upstream node operates as an exit node for the network with respect to the predetermined type of traffic, and wherein all packets of information that are associated with the predetermined type of traffic and that are transmitted by the traffic node are transmitted via the master upstream port.

23. The network of claim 22, wherein the predetermined type of traffic is selected from the group consisting of voice traffic, video traffic, data traffic, and Internet traffic.