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Configuring IPv4 FRR

Latest reply: Sep 8, 2018 07:01:30 370 1 1 0 0

Configuring IPv4 FRR

IPv4 FRR applies to the services that are very sensitive to delay and packet loss on IPv4 networks.

Applicable Environment

If a link failure occurs after FRR is enabled, the fault detection module reports the failure to the upper-layer routing system. The FRR module immediately uses a backup link to forward packets, minimizing the impact of the link failure on services.

icon-notice.gif NOTICE:

IPv4 FRR implements route backup among routes of different routing protocols and may cause routing loops. Therefore, exercise caution when using IPv4 FRR.

Pre-configuration Tasks

Before configuring IPv4 FRR, complete the following task:

  • Configuring link layer protocol parameters and assigning IPv4 addresses to interfaces to ensure that the link layer protocol of the interfaces is Up

  • Configuring IPv4 routes destined for the same destination address but discovered by different routing protocols


  1. Run:

    The system view is displayed.

  2. Run:

    IPv4 FRR is enabled.

    By default, IPv4 FRR is disabled.

    icon-note.gif NOTE:

    When FRR is configured in both the system view and the routing protocol view, FRR configured in the routing protocol view is used for route backup.

  3. Run:

    The configuration is committed.

Checking the Configuration

After IPv4 FRR is configured, run the following command to check the configuration.

Run the display ip routing-table verbose command to check detailed information about the backup outbound interfaces and backup next hops of routes in the routing table.

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Created Sep 8, 2018 07:01:30

Thanks, this is helpful.
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