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Configuration Guide - VPN

CloudEngine 12800 and 12800E V200R005C10

This document describes the configurations of VPN, including GRE, BGP/MPLS IP VPN, BGP/MPLS IPv6 VPN, VLL, PWE3, and VPLS.
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Configuring VPNv6 FRR

Configuring VPNv6 FRR

This section describes how to configure VPNv6 FRR for routes on a private network in the CE multi-homing networking. This feature can quickly switch traffic to a link connected to another CE if the primary route from a PE to a CE becomes unreachable.

Pre-configuration Tasks

Before configuring VPNv6 FRR, complete the following tasks:

Applicable Environment

VPNv6 FRR is applicable to IPv6 services that are sensitive to the packet loss and delay. The system has higher requirements on the VPN that transmits IPv6 services. If VPNv6 FRR is enabled, IPv6 VPN services can be quickly switched to another link if a fault occurs on the VPN. In this manner, IPv6 VPN services are not interrupted.

The switch supports VPNv6 auto FRR. This function automatically selects the next hop (a PE device) for VPN routes if there are no fixed backup next hops.


  1. Run system-view

    The system view is displayed.

  2. Run bgp { as-number-plain | as-number-dot }

    The BGP view is displayed.

  3. Run ipv6-family vpn-instance vpn-instance-name

    The BGP-VPN instance IPv6 address family view is displayed.

  4. Run auto-frr

    VPNv6 auto FRR is enabled.

  5. (Optional) Run route-select delay delay-value

    A delay for selecting a route to the intermediate device on the primary path is configured. After the primary path recovers, an appropriate delay ensures that traffic switches back to the primary path after the intermediate device refreshes forwarding entries.

    The default value of delay-value is 0, indicating that the device on which FRR is configured selects a route to the intermediate device on the primary path without a delay.

  6. Run commit

    The configuration is committed.

Verifying the Configuration

Run the display ipv6 routing-table vpn-instance vpn-instance-name [ ipv6-address ] [ verbose ] command to check the backup next hop, backup tunnel, and backup label in the routing table.

Updated: 2019-04-03

Document ID: EDOC1100075353

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