Hybrid distributed linear protection

1. A multi-node distributed protection method comprising:

providing, at a first node portal located at the edge of an administrative network domain including one or more clients, dedicated 1:1 protection switching to each of the clients in the administrative network domain; and

performing, at the first node portal, 1:N protection switching for each of the clients on an intraportal link communicatively coupling a first network element and a second network element located within the first node portal.

2. The method of claim 1 , wherein:

providing dedicated 1:1 protection switching to each of the clients in the administrative network domain includes exchanging linear automatic protection switching (“APS”) messages with the clients in the administrative network domain over a path pair to each client, each path pair including:

a working path segment communicatively coupling a respective client and the first network element; and

a network protect path segment communicatively coupling the respective client and the second network element; and

performing 1:N protection switching for each of the clients on the intraportal link includes:

translating the linear APS messages received on the network protect path segment into a shared mesh protection message, the shared mesh protection message configured to activate an intraportal protection path segment on the intraportal link, the intraportal protection path segment configured to protect a plurality of working paths; and

exchanging the shared mesh protection message between the first network element and the second network element over the intraportal link.

3. The method of claim 2 , further comprising:

determining a failed working path segment;

sending the shared mesh protection activation message to the second network element; and

based on the shared mesh protection activation message, connecting an associated network protect path segment to the intraportal protection path segment;

wherein the failed working path segment and the associated network protect path segment are included in a path pair of one of the clients.

4. The method of claim 3 , further comprising:

translating the shared mesh protection activation message into one or more linear APS activation messages; and

sending the linear APS activation message to a respective one or more of the clients over a corresponding respective one or more of the network protect path segments.

5. The method of claim 4 , further comprising, based on the linear APS activation message, activating a network protect path segment associated with the linear APS activation message.

6. The method of claim 2 , further comprising:

determining a failed working path segment;

receiving an activation linear APS message from a client at the second network element; and

based on which of the activation linear APS message, connecting an associated network protect path segment to the intraportal protection path segment;

wherein the client is communicatively coupled to the first network element through the failed working path segment.

7. The method of claim 2 , further comprising:

determining a failed working path segment;

receiving an activation linear APS message from a client at the second network element;

sending the shared mesh protection activation message to the second network element; and,

based on which of the activation linear APS message and the shared mesh protection activation message was received first at the second network element, connecting an associated network protect path segment to the intraportal protection path segment;

wherein the client is communicatively coupled to the first network element through the failed working path segment.

8. The method of claim 2 , further comprising:

determining receipt of a linear APS message indicating a failure of one of the working path segments;

monitoring the intraportal link for a status message from the second network element;

determining that the status message from the second network element has not been received;

monitoring integrity of the intraportal link;

determining that the intraportal link has failed; and

determining that the second network element has failed based upon determining that that the APS message has been received, that the status message from the second network element has not been received, and that the intraportal link has failed.

9. The method of claim 6 , further comprising transmitting data between the client and a node within a second node portal communicatively coupled to the first node portal and located across a second administrative network domain, the transmitted data bypassing the second network element.

10. The method of claim 1 , wherein the first node portal is configured to communicate using G.8031 Ethernet Linear Protection, G.873.1 Optical Transport Network Linear Protection, or Multiprotocol Label Switching Transport Profile Linear Protection G.8131.1 and G.8131.2 standards.

11. The method of claim 1 , wherein the first node portal is configured to provide protection in conjunction with a single-homed or dual-homed user network interface (UNI).

12. The method of claim 1 , wherein the first node portal is configured to provide protection as part of a Network-to-UNI model, Network-to-Ethernet-Network-Interface model, or Network-to-Network model.

13. A non-transitory computer readable medium that stores computer-executable instructions which, when executed by a processor, performs a multi-node distributed protection method, the method comprising:

providing, at a first node portal located at the edge of an administrative network domain including one or more clients, dedicated 1:1 protection switching to each of the clients in the administrative network domain; and

performing, at the first node portal, 1:N protection switching for each of the clients on an intraportal link communicatively coupling a first network element and a second network element located within the first node portal.

14. The article non-transitory computer readable medium of claim 13 , wherein:

providing dedicated 1:1 protection switching to each of the clients in the administrative network domain includes exchanging linear automatic protection switching (“APS”) messages with the clients in the administrative network domain over a path pair to each client, each path pair including:

a working path segment communicatively coupling a respective client and the first network element; and

a network protect path segment communicatively coupling the respective client and the second network element; and

performing 1:N protection switching for each of the clients on the intraportal link includes:

translating the linear APS messages received on the network protect path segment into a shared mesh protection message, the shared mesh protection message configured to activate an intraportal protection path segment on the intraportal link, the intraportal protection path segment configured to protect a plurality of working paths; and

exchanging the shared mesh protection message between the first network element and the second network element over the intraportal link.

15. The non-transitory computer readable medium of claim 14 , further comprising instructions for causing the processor to:

determine a failed working path segment;

send the shared mesh protection activation message to the second network element; and

based on the shared mesh protection activation message, connect an associated network protect path segment to the intraportal protection path segment; wherein

the failed working path segment and the associated network protect path segment are included in a path pair of one of the clients.

16. The non-transitory computer readable medium of claim 15 , further comprising instructions for causing the processor to:

translate the shared mesh protection activation message into one or more linear APS activation messages; and

send the linear APS activation messages to a respective one or more of the clients over a corresponding respective one or more of the network protect path segments.

17. The non-transitory computer readable medium of claim 16 , further comprising instructions for causing the processor to, based on the linear APS activation messages, activate a network protect path segment associated with the linear APS activation message.

18. The non-transitory computer readable medium of claim 14 , further comprising instructions for causing the processor to:

determine a failed working path segment;

receive an activation linear APS message from a client at the second network element; and

based on which of the activation linear APS message, connect an associated network protect path segment to the intraportal protection path segment;

wherein the client is communicatively coupled to the first network element through the failed working path segment.

19. The non-transitory computer readable medium of claim 14 , further comprising instructions for causing the processor to:

determine a failed working path segment;

receive an activation linear APS message from a client at the second network element;

send the shared mesh protection activation message to the second network element; and,

based on which of the activation linear APS message and the shared mesh protection activation message was received first at the second network element, connect an associated network protect path segment to the intraportal protection path segment;

wherein the client is communicatively coupled to the first network element through the failed working path segment.

20. The non-transitory computer readable medium of claim 14 , further comprising instructions for causing the processor to:

determine receipt of a linear APS message indicating a failure of one of the working path segments;

monitor the intraportal link for a status message from the second network element;

determine that the status message from the second network element has not been received;

monitor integrity of the intraportal link;

determine that the intraportal link has failed; and

determine that the second network element has failed based upon determining that that the APS message has been received, that the status message from the second network element has not been received, and that the intraportal link has failed.

21. The non-transitory computer readable medium of claim 20 , further comprising instructions for causing the processor to transmit data between the client and a node within a second node portal communicatively coupled to the first node portal and located across a second administrative network domain, the transmitted data bypassing the second network element.

22. The non-transitory computer readable medium of claim 13 , wherein the first node portal is configured to communicate using G.8031 Ethernet Linear Protection, G.873.1 Optical Transport Network Linear Protection, or Multiprotocol Label Switching Transport Profile Linear Protection G.8131.1 and G.8131.2 standards.

23. The non-transitory computer readable medium of claim 13 , wherein the first node portal is configured to provide protection in conjunction with a single-homed or dual-homed user network interface (UNI).

24. The non-transitory computer readable medium of claim 13 , wherein the first node portal is configured to provide protection as part of a Network-to-UNI model, Network-to-Ethernet-Network-Interface model, or Network-to-Network model.

25. A first node portal located at the edge of an administrative network domain including one or more clients, the first node portal comprising:

a first network element;

a second network element;

a path pair to each client providing dedicated 1:1 protection switching to each of the clients in the administrative network domain by exchanging linear automatic protection switching (“APS”) messages with the clients in the administrative network domain, each path pair including a working path segment communicatively coupling a respective client and the first network element and a network protect path segment communicatively coupling the respective client and the second network element; and

an intraportal link communicatively coupling the first network element and the second network element, the intraportal link performing 1:N protection switching for each of the clients on the intraportal link by transmitting a shared mesh protection message translated from the linear APS messages received on the network protect path, the shared mesh protection message configured to activate an intraportal protection path segment on the intraportal link, the intraportal protection path segment configured to protect a plurality of working paths, and exchanging the shared mesh protection message between the first network element and the second network element over the intraportal link.

26. The first node portal of claim 25 , wherein

the first network element determines a failed working path segment and sends, via the intraportal link, the shared mesh protection activation message to the second network element; and

the second network element connects, based on the shared mesh protection activation message, an associated network protect path segment to the intraportal protection path segment;

wherein the failed working path segment and the associated network protect path segment are included in a path pair of one of the clients.

27. The first node portal of claim 26 , wherein

the second network element translates the shared mesh protection activation message into one or more linear APS activation messages and sends the linear APS activation messages to a respective one or more of the clients over a corresponding respective one or more of the network protect path segments.

28. The first node portal of claim 27 , wherein a particular network protect path segment is associated with a particular linear APS activation message.

29. The first node portal of claim 25 , wherein

the second network element determines a failed working path segment;

the second network element receives an activation linear APS message from a client; and

based on which of the activation linear APS message, connect an associated network protect path segment to the intraportal protection path segment;

wherein the client is communicatively coupled to the first network element through the failed working path segment.

30. The first node portal of claim 25 , wherein

the first network element and the second network element determine a failed working path segment;

the second network element receives an activation linear APS message from a client at the second network element;

the first network element sends the shared mesh protection activation message to the second network element; and,

based on which of the activation linear APS message and the shared mesh protection activation message was received first at the second network element, connect an associated network protect path segment to the intraportal protection path segment;

wherein the client is communicatively coupled to the first network element through the failed working path segment.

31. The first node portal of claim 25 , wherein

the first network element receives a linear APS message indicating a failure of one of the working path segments;

the first network element monitors the intraportal link for a status message from the second network element;

the first network element determines that the status message from the second network element has not been received;

the first network element monitors integrity of the intraportal link;

the first network element determines that the intraportal link has failed; and

the first network element determines that the second network element has failed based upon determining that that the APS message has been received, that the status message from the second network element has not been received, and that the intraportal link has failed.

32. The first node portal of claim 31 , wherein the first node portal transmits data between the client and a second node portal communicatively coupled to the first node portal and located across a second administrative network domain, the transmitted data bypassing the second network element.

33. The first node portal of claim 25 , wherein the first node portal communicates using G.8031 Ethernet Linear Protection, G.873.1 Optical Transport Network Linear Protection, or Multiprotocol Label Switching Transport Profile Linear Protection G.8131.1 and G.8131.2 standards.

34. The first node portal of claim 25 , wherein the first node portal provides protection in conjunction with a single-homed or dual-homed user network interface (UNI).

35. The first node portal of claim 25 , wherein the first node portal provides protection as part of a Network-to-UNI model, Network-to-Ethernet-Network-Interface model, or Network-to-Network model.