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Configuration Guide - IP Unicast Routing

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

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.
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Setting a Period Within Which OSPF Keeps the Maximum Cost in Local LSAs

Setting a Period Within Which OSPF Keeps the Maximum Cost in Local LSAs

Context

When an OSPF interface changes from Down to Up, the OSPF neighbor relationship is re-established. When IGP route convergence ends, traffic is switched back. IGP routes converge fast. Many services that depend on IGP routes may require a delayed switchback. In this case, you can run the ospf peer hold-max-cost command so that OSPF keeps the maximum cost in local LSAs for a specified period after the OSPF neighbor relationship reaches Full state. During this period, the traffic forwarding path remains unchanged. After this period elapses, the original cost is restored, and traffic is switched back.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The interface view is displayed.

  3. Run ospf peer hold-max-cost timer

    A period within which OSPF keeps the maximum cost in local LSAs is set.

  4. Run commit

    The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100074760

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