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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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Configuring the SPF Timer

Configuring the SPF Timer

Context

When the OSPFv3 link state database (LSDB) changes, SPF calculation needs to be performed again. A shorter SPF calculation interval can increase the network convergence speed, but also occupies more resources. If the network changes frequently, the bandwidth may be used up. A longer SPF calculation interval occupies less resources, which prevents the bandwidth from being used up due to frequent network changes. However, the network convergence speed becomes slower in this scenario. Set the interval based on the actual network.

Do as follows on the switch that runs OSPFv3.

Procedure

  • Configure an SPF normal timer.
    1. Run system-view

      The system view is displayed.

    2. Run ospfv3 [ process-id ]

      The OSPFv3 view is displayed.

    3. Run spf timers delay-interval hold-interval

      An SPF normal timer is configured.

    4. Run commit

      The configuration is committed.

  • Configure an SPF intelligent timer.
    1. Run system-view

      The system view is displayed.

    2. Run ospfv3 [ process-id ]

      The OSPFv3 view is displayed.

    3. Run spf-schedule-interval { delay-interval hold-interval | intelligent-timer max-interval start-interval hold-interval-1 }

      An SPF intelligent timer is configured.

    4. Run commit

      The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100074760

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