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CLI-based Configuration Guide - VPN

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

This document describes VPN features on the device and provides configuration procedures and configuration examples.
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Configuring IP FRR for VPN Routes

Configuring IP FRR for VPN Routes

When multiple CE devices in a VPN site connect to the same PE, you can configure IP FRR for VPN routes. IP FRR enables VPN traffic to be fast switched to another PE-CE link when the next hop of the primary route is unreachable.

Pre-configuration Tasks

Before configuring IP FRR for VPN routes, complete the following tasks:

Context

IP FRR for VPN routes is used in scenarios where multiple CE devices connect to one PE device. As shown in Figure 7-40, the PE device forwards data to the site of vpn1 through Link_A, and Link_B is a backup link. When the PE device detects that the route to CE1 is unreachable, it immediately switches traffic to Link_B and then performs other operations to trigger VPN route convergence. This minimizes impact of the link failure on VPN services.

Figure 7-40  IP FRR for VPN routes

Configuration Procedure

The router supports IP FRR for VPN routes.

Perform the following steps on a PE device.

Procedure

  • configuring IP FRR
    1. Run system-view

      The system view is displayed.

    2. Run route-policy route-policy-name { permit | deny } node node

      A node is configured for a route-policy, and the route-policy view is displayed.

    3. Run apply backup-interface interface-type interface-number

      A backup outbound interface is specified.

    4. (Optional) Run apply backup-nexthop ip-address

      A backup next hop is specified.

      The backup next hop is optional for a P2P link and mandatory for a non-P2P link.

    5. Run quit

      Return to the system view.

    6. Run ip vpn-instance vpn-instance-name

      The VPN instance view is displayed.

    7. Run ipv4-family

      The VPN instance IPv4 address family view is displayed.

    8. Run ip frr route-policy route-policy-name

      IP FRR is enabled for the VPN instance IPv4 address family.

Verifying the Configuration

Run the display ip routing-table vpn-instance vpn-instance-name [ ipv4-address ] verbose command to check the backup next hops and backup outbound interfaces of VPN-IPv4 routes in the routing table.

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Updated: 2019-08-07

Document ID: EDOC1100033725

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