US 2015/0312133 A1 · Autonomous System Border Router (ASBR) Advertising Routes with a Same Forwarding Label

Abstract

In one embodiment, an autonomous system border router (ASBR) advertises a same forwarding label for received advertised routes of a merging context that were advertised with a same forwarding label for the ASBR to use when sending corresponding packets. An ASBR receives via a routing protocol from a particular router in the same autonomous system, a plurality of same-labeled received routes advertised with a same first forwarding label within a merging context. In response to each of the plurality of same-labeled received routes having the same first forwarding label to use to forward packets to the particular router and being in the same merging context, the ASBR determines a merged forwarding label and advertises to a peer ASBR in another autonomous system (AS) each of the plurality of same-labeled received routes with the merged forwarding label for the peer ASBR to use to forward packets to the ASBR.

Claims20

Dependent claims

A method, comprising:

receiving, via a routing protocol by an autonomous system border router (ASBR) from a particular router in the same autonomous system, a plurality of same-labeled received routes advertised with a same first forwarding label within a merging context;
and
in response to each of the plurality of same-labeled received routes having the same first forwarding label to use to forward packets to the particular router and being in the same merging context, the ASBR determines a merged forwarding label and advertises to a peer ASBR in another autonomous system (AS) each of the plurality of same-labeled received routes with the merged forwarding label for the peer ASBR to use to forward packets to the ASBR.

An autonomous system border router (ASBR), comprising:

one or more processing elements;
memory;
a plurality of interfaces configured to send and receive packets;
and
one or more packet switching mechanisms configured to packet switch packets among said interfaces;
wherein said ASBR configured to perform operations, including:
receiving, via a routing protocol by an autonomous system border router (ASBR) from a particular router in the same autonomous system, a plurality of same-labeled received routes advertised with a same first forwarding label within a merging context;
and
in response to each of the plurality of same-labeled received routes having the same first forwarding label to use to forward packets to the particular router and being in the same merging context, the ASBR determining a merged forwarding label and advertising to a peer ASBR in another autonomous system (AS) each of the plurality of same-labeled received routes with the merged forwarding label for the peer ASBR to use to forward packets to the ASBR.

6 more elements

Dependencies are inferred from the claim text.

Autonomous System Border Router (ASBR) Advertising Routes with a Same Forwarding Label

Life of this patent

Autonomous System Border Router (ASBR) Advertising Routes with a Same Forwarding Label

Life of this patent

Abstract

Claims20