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Configuration Guide - IP Unicast Routing

S7700 and S9700 V200R013C00

This document describes the configurations of IP Unicast Routing, including IP Routing, Static Route, RIP, RIPng, OSPF, OSPFv3, IPv4 IS-IS, IPv6 IS-IS, BGP, Routing Policy, IP Routing Table Management, and PBR.
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Enabling IPv4 IS-IS Auto FRR

Enabling IPv4 IS-IS Auto FRR


Perform the following steps on the switch that needs the protection for the forwarded traffic:


  1. Run system-view

    The system view is displayed.

  2. Run isis [ process-id ]

    The IS-IS process is enabled and the IS-IS view is displayed.

  3. Run frr

    The IS-IS Auto FRR view is displayed.

  4. (Optional) Run frr-policy route route-policy route-policy-name

    Backup routes are filtered using a filtering policy. Only backup routes that have passed the filtering policy are added to the routing table.

  5. Run loop-free-alternate [ level-1 | level-2 | level-1-2 ]

    IS-IS Auto FRR is enabled and the loop-free backup route is created.

    If the IS-IS level is not specified, IS-IS Auto FRR is enabled on Level-1 and Level-2 to create the backup route.


    IS-IS can create the loop-free backup route only if the interface cost is in compliance with the traffic protection inequality of IS-IS Auto FRR.

Updated: 2019-04-08

Document ID: EDOC1100065744

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