SELECTIVE ROUTING TRAFFIC CONTROLS AND AUTOMATED RECOVERY AMONG PARALLEL MULTI-ACCESS INTERFACES

• US 20100097925A1
• Filed: 10/16/2008
• Published: 04/22/2010
• Est. Priority Date: 10/16/2008
• Status: Abandoned Application

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: BELL, JON A.
• Application Number:
  US12/252,686
• Publication Number:
  US 20100097925A1
• Time in Patent Office: Days
• US Class Current: 370/219
• 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
• CPC Class Codes: H04L 49/30 Peripheral units, e.g. input or output ports
• CPC Class Codes: H04L 49/557 Error correction, e.g. fault recovery or fault tolerance

Abstract

The present invention discloses a solution for automated interface switching among routing interfaces. In the solution, a routing daemon can be responsive to operator commands. Routing can be performed in a restricted parallel multi-access interface configuration comprised of a primary and backup interface for conveying routing protocol traffic. The backup interface can be utilized only when the associated primary interface is unavailable. The commands can include a suspend and an activate interface command able to modify the operation of one or more interfaces at the application layer. The suspend interface command can suppress network routing protocol traffic over a specified primary interface and route the traffic over the backup interface. The backup interface can then be designated as the primary interface for which the routing traffic can be conveyed. The activate interface command can activate a suspended interface and can be designated as a backup interface when a primary interface is available. When a primary interface is not available, the activate command can activate a suspended interface and designate the interface as the primary interface.

Claims

1. A method for routing network traffic comprising:

identifying at least one of a plurality of routers within an operating environment, wherein the operating environment is a multi-path multi-protocol routing environment, wherein each router in the environment is associated with at least one of plurality of interfaces;

receiving a command to suspend traffic for one of a plurality of protocols associated with the router interface, wherein at least one protocol is suppressed on the interface;

suspending traffic for the suppressed protocol on the associated router interface, wherein the suspended routing interface is designated as a primary interface, wherein different protocols associated with the routing interface are unaffected;

responding to the suppressed protocol traffic, wherein the response is the changing of the routing interface to a backup routing interface, wherein the change is designating the backup interface as a primary interface for routing traffic of the suppressed protocol.

2. The method of claim 1, wherein the suspension of routing traffic occurs at the application layer within a routing daemon.

3. The method of claim 1, wherein the responding results in the activation of a suspended interface.

4. The method of claim 1, wherein the operating environment enforces a model comprising of at least one a primary interface and a backup interface.

5. The method of claim 1, wherein the suppressed protocol is a routing protocol.

6. The method of claim 1, wherein the suppressed protocol is at least one of Open Shortest Path First (OSPF) and Routing Information Protocol (RIP).

7. A system for routing network traffic comprising:

a routing daemon configured to identify a primary interface and a backup interface, wherein the backup interface is used to route traffic when a primary interface is unavailable.

8. The system of claim 7, wherein the primary interface and the backup interface is a multi-access interface.

9. The system of claim 7, wherein the routing daemon is OMPROUTE.

10. The system of claim 7, wherein the routing daemon operates in an environment corresponding to an OSI layered model of network communications, wherein an application layer is different from a physical layer and there exists a one-to-one correspondence between an application layer interface and a physical layer interface.

11. A system responsive to routing traffic commands comprising:

a routing daemon responsive to at least one of a plurality of commands able to modify the operation of an interface at the application layer, wherein the command is a suspend command and an activate command;

a primary interface able to convey at least one of a plurality of routing protocol traffic; and

a backup interface configured to convey at least one of a plurality routing protocol traffic when a primary interface is unavailable.

12. The system of claim 11, wherein the routing daemon response results in the corresponding interface at the physical interface layer in the Internet Protocol (IP) stack remaining active.

13. The system of claim 11, wherein the suspend command suspends an active interface at the application layer within the routing daemon resulting in routing protocol traffic suppression on the suspended interface.

14. The system of claim 11, wherein the suspend command results in routing traffic communicated over the backup interface.

15. The system of claim 11, wherein the activate command restores a suspended interface at the application layer within the routing daemon resulting in routing protocol traffic routed over the restored interface.

16. The system of claim 11, wherein the activate command results in the backup interface not routing traffic when the primary interface is available.

17. The system of claim 11, wherein a deactivated physical interface remains deactivated.