2000•Unpublished venueRequires access
Segment Routing PCE Delegation in BGP
Yuanxiang Qiu, Yang Wang, Mengxiao Chen, Liping Yang, Hao Li
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Abstract
Segment Routing is a source routing paradigm that explicitly indicates
the forwarding path for packets at the ingress node. An SR policy is a
set of candidate SR paths consisting of one or more segment lists with
necessary path attributes. The headend of an SR Policy may learn
multiple candidate paths for an SR Policy. Candidate paths may be
learned via a number of different mechanisms, e.g., CLI, NetConf,
PCEP, or BGP. The Path Computation Element (PCE) provides path
computation functions in support of traffic engineering in Multi
Protocol Label Switching (MPLS) and Generalized MPLS (GMPLS) networks.
Currently, when a controller uses BGP to deploy an SR Policy, there is
no way to encode PCE delegation related options. The only way to
import a PCE delegation is through local configuration management,
e.g., Netconf, CLI or gRPC. This document defines extensions to BGP
to distribute PCE delegation information within an SR policy.