Configuring BGP VPWS FRR

BGP VPWS FRR allows VPWS traffic to switch to the secondary PW when the primary PW fails.

Usage Scenario

VPN FRR sets in advance on a remote PE forwarding entries pointing to the master and backup PEs, respectively. In collaboration with fast PE fault detection, VPN FRR can reduce the end-to-end service convergence time to less than 1s when a PE fault occurs on an MPLS VPN where a CE is dual-homed to two PEs and decouple the PE recovery time from the number of VPN routes on that PE.

VPN FRR is also simple, reliable, and easy to deploy. VPN FRR is dependent only on the fast fault detection mechanism of a PE and does not require collaboration from other devices.

VPWS FRR, a type of VPN FRR, allows VPWS traffic to rapidly switch to the secondary PW when the primary PW fails.

Typical BGP VPWS FRR scenarios include:
  • Symmetric access of CEs to PEs: The two CEs communicate over two paths, one as the primary path and the other the secondary path.
  • Asymmetric access of CEs to PEs: One CE connects to a PE over a high-reliability link, and the other CE is dual-homed to two PEs over two low-reliability links. The two CEs communicate over two paths. The high-reliability path serves as the primary path, and the low-reliability path serves as the secondary path.

Pre-configuration Tasks

Before configuring VPWS FRR, complete the following tasks:

  • Configure static routes or an IGP on the PEs and Ps of the MPLS backbone network to ensure IP connectivity.

  • Configure basic MPLS functions on the PEs and Ps of the MPLS backbone network.

  • Establish LDP/BGP sessions among PEs. If PEs are indirectly connected, establish remote LDP sessions between them.

  • Establish tunnels between PEs based on the tunnel policy.

Parent Topic: VPWS Configuration
Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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