No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.

Configuration Guide - IP Unicast Routing
CloudEngine 12800 and 12800E V200R002C50

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, and PBR.

Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Enabling OSPF IP FRR

Enabling OSPF IP FRR


FRR calculation consumes a large number of CPU resources. If the device is running features with higher priorities than FRR calculation, you need to delay FRR calculation.

Perform the following steps on a switch that needs to protect traffic to be forwarded.


  1. Run system-view

    The system view is displayed.

  2. Run ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] *

    An OSPF process is started and the OSPF view is displayed.

  3. Run frr

    The OSPF IP FRR view is displayed.

  4. Run loop-free-alternate

    OSPF IP FRR is enabled to generate a loop-free backup path.


    OSPF can generate a loop-free backup path only when the OSPF IP FRR traffic protection inequality is met.

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

    An OSPF IP FRR filtering policy is configured.

    After an OSPF IP FRR filtering policy is configured, only OSPF backup routes that pass the filtering criteria defined in the policy can be added to the forwarding table.

  6. (Optional) Run tiebreaker { node-protecting | lowest-cost } preference preference

    The solution of selecting a backup path for OSPF IP FRR is set.

    By default, the solution of selecting a backup path for OSPF IP FRR is node-protection path first. In some cases, the solution needs to be changed to smallest-cost path first because of data forwarding capacity or link cost consideration. By default, the higher-cost path is selected as the backup path. To change the solution of selecting a backup path for OSPF IP FRR to smallest-cost path first, run the tiebreaker command. After the command is run, the smallest-cost path is selected as the backup path.

  7. Run commit

    The configuration is committed.

Updated: 2019-03-21

Document ID: EDOC1000166601

Views: 294081

Downloads: 168

Average rating:
This Document Applies to these Products

Related Version

Related Documents

Previous Next