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Configuration Guide - VPN 01

NE05E and NE08E V300R003C10SPC500

This is NE05E and NE08E V300R003C10SPC500 Configuration Guide - VPN
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Configuring VPNv6 FRR

Configuring VPNv6 FRR

This section describes how to configure VPNv6 FRR to protect PEs.

Usage Scenario

VPNv6 FRR applies to IPv6 services that are sensitive to the packet loss and delay. The requirements for VPNs transmitting IPv6 services are high. If VPNv6 FRR is enabled, IPv6 VPN services can be quickly switched to another link when a fault occurs on the VPN. As a result, IPv6 VPN services are not interrupted.

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

Pre-configuration Tasks

Before configuring VPNv6 FRR, complete the following tasks:

  • Configure a BGP/MPLS IPv6 VPN.

  • Ensure that the PE receives IPv6 VPN routes with the same prefix from different VPNv6 peers.


  1. Run system-view

    The system view is displayed.

  2. Run bgp as-number

    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 completes refreshing forwarding entries.

    The delay-value value is an integer ranging from 0 to 3600, in seconds. The default delay-value 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.


Run the display ipv6 routing-table vpn-instance vpn-instance-name [ ipv6-address ] verbose command on the PE where VPNv6 FRR is enabled to check the backup next hop, backup tunnel, and backup label in the routing table.


Run the display ipv6 routing-table vpn-instance verbose command on the PE where VPNv6 FRR is enabled. The command output shows the backup next hop (a PE), backup tunnel, and backup label of routes. For example, if you set the primary next hop and backup next hop for the route to 200:0:1:2::1 to and respectively on the PE, the information about the backup next hop, backup tunnel, and backup label is as follows:

<HUAWEI> display ipv6 routing-table vpn-instance vpna 200:0:1:2::1 128 verbose

Routing Table :vpna
Summary Count : 1

 Destination  : 200:0:1:2::1                    PrefixLength : 128
 NextHop      : ::FFFF:                  Preference   : 255
 Neighbour    : ::                       ProcessID    : 0
 Label        : 1030                            Protocol     : BGP
 State        : Active Adv Relied               Cost         : 0
 Entry ID     : 12                              EntryFlags   : 0x80024904
 Reference Cnt: 2                               Tag          : 0
 IndirectID   : 0x4                             Age          : 31sec 
 RelayNextHop : ::FFFF:                TunnelID     : 0x0000000001004c4ba2
 Interface    : LDP LSP                        Flags        : RD
 BkNextHop    : ::FFFF:                  BkInterface  :
 BkLabel      : 1026                            BkTunnelID   : 0x0
 BkPETunnelID : 0x800001                        BkIndirectID : 0x6 
Updated: 2019-01-14

Document ID: EDOC1100058925

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