Activating mobile backup link based on wired customer edge-provider edge (CE-PE) link status

Patent metadata

Field	Value
Publication number	US-9992039-B2
Application number	US-201414336826-A
Country	US
Kind code	B2
Filing date	Jul 21, 2014
Priority date	May 7, 2014
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A method is provided in one embodiment and includes establishing a primary wired access link between a first routing device and a second routing device, and establishing a backup wireless access link between the first routing device and the second routing device. The method further includes determining a status of the primary wired access link indicative of whether the primary wired access link between the first routing device and the second routing device has failed. The method still further include activating the backup wireless access link between the first routing device and the second routing device when it is determined that the status of the primary wired access link is indicative that the primary wired access link has failed.

First claim

What is claimed is:

1. A method, comprising:
establishing a primary wired access link between a first routing device and a second routing device, wherein the first routing device is a customer edge mobile routing device in communication with a wired core network and a mobile core network and wherein the primary wired access link uses a first routing protocol;
establishing a backup wireless access link between the first routing device and the second routing device, wherein the backup wireless access link uses a second routing protocol, wherein the second routing protocol is different from the first routing protocol, and wherein the primary wired access link using the first routing protocol and the backup wireless access link using the second routing protocol co-exist within a routing information base of the first routing device, each of the primary wired access link and the backup wireless access link being installable as an active route within the routing information base;
installing the primary wired access link in the routing information base of the first routing device as the active route;
determining, by a routing agent of the first routing device, a status of the primary wired access link indicative of whether the primary wired access link between the first routing device and the second routing device has failed; and
activating, by the first routing device, the backup wireless access link between the first routing device and the second routing device when it is determined that the status of the primary wired access link is indicative that the primary wired access link has failed, wherein activating the backup wireless access link between the first routing device and the second routing device includes the routing agent of the first routing device installing the backup wireless access link in the routing information base as the active route responsive to determining that the status of the primary wired access link is indicative that the primary wired access link has failed, wherein installing the backup wireless access link in the routing information base comprises switching from use of the first routing protocol to use of the second routing protocol.

2. The method of claim 1 , wherein determining the status of the primary wired access link includes determining whether the primary wired access link has failed using a Bidirectional Forwarding Detection (BFD) protocol.

3. The method of claim 1 , wherein the primary wired access link is a Multiprotocol Label Switching (MPLS) link.

4. The method of claim 1 , wherein the primary wired access link is one or more of a TI link or a T3 link.

5. The method of claim 1 , wherein the primary wired access link utilizes a border gateway protocol (BGP).

6. The method of claim 1 , wherein the backup wireless access link utilizes a mobile IP protocol.

7. The method of claim 1 , wherein the backup wireless access link is one or more of a 3G link, a 4G link, or an LTE link.

8. The method of claim 1 , wherein the second routing device is a provider edge routing device.

9. Logic encoded in one or more non-transitory media that includes code for execution and when executed by a processor is operable to perform operations comprising:
establishing a primary wired access link between a first routing device and a second routing device, wherein the first routing device is a customer edge mobile routing device in communication with a wired core network and a mobile core network and wherein the primary wired access link uses a first routing protocol;
establishing a backup wireless access link between the first routing device and the second routing device, wherein the backup wireless access link uses a second routing protocol, wherein the second routing protocol is different from the first routing protocol, and wherein the primary wired access link using the first routing protocol and the backup wireless access link using the second routing protocol co-exist within a routing information base of the first routing device, each of the primary wired access link and the backup wireless access link being installable as an active route within the routing information base;
installing the primary wired access link in the routing information base of the first routing device as the active route;
determining, by a routing agent of the first routing device, a status of the primary wired access link indicative of whether the primary wired access link between the first routing device and the second routing device has failed; and
activating, by the first routing device, the backup wireless access link between the first routing device and the second routing device when it is determined that the status of the primary wired access link is indicative that the primary wired access link has failed, wherein activating the backup wireless access link between the first routing device and the second routing device includes the routing agent of the first routing device installing the backup wireless access link in the routing information base as the active route responsive to determining that the status of the primary wired access link is indicative that the primary wired access link has failed, wherein installing the backup wireless access link in the routing information base comprises switching from use of the first routing protocol to use of the second routing protocol.

10. The logic of claim 9 , wherein determining the status of the primary wired access link includes determining whether the primary wired access link has failed using a Bidirectional Forwarding Detection (BFD) protocol.

11. The logic of claim 9 , wherein the second routing device is a provider edge routing device.

12. A first routing device, comprising:
a memory element configured to store electronic code;
a processor operable to execute instructions associated with the electronic code; and
a module coupled to the memory element and the processor, wherein the first routing device is configured for:
establishing a primary wired access link between the first routing device and a second routing device, wherein the first routing device is a customer edge mobile routing device in communication with a wired core network and a mobile core network and wherein the primary wired access link uses a first routing protocol;
establishing a backup wireless access link between the first routing device and the second routing device, wherein the backup wireless access link uses a second routing protocol, wherein the second routing protocol is different from the first routing protocol, and wherein the primary wired access link using the first routing protocol and the backup wireless access link using the second routing protocol co-exist within a routing information base of the first routing device, each of the primary wired access link and the backup wireless access link being installable as an active route within the routing information base;
installing the primary wired access link in the routing information base of the first routing device as the active route;
determining, by a routing agent of the first routing device, a status of the primary wired access link indicative of whether the primary wired access link between the first routing device and the second routing device has failed; and
activating, by the first routing device, the backup wireless access link between the first routing device and the second routing device when it is determined that the status of the primary wired access link is indicative that the primary wired access link has failed, wherein activating the backup wireless access link between the first routing device and the second routing device includes the routing agent of the first routing device install

Assignees

• Cisco Tech Inc

Inventors

• Anandan Swapna
• Gopinathan Sujay

Classifications

• H04L45/22

  Alternate routing · CPC title

• H04L47/12

  Avoiding congestion; Recovering from congestion · CPC title

• H04L12/4633 Primary

  Interconnection of networks using encapsulation techniques, e.g. tunneling · CPC title