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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 the Maximum Number of Equal-Cost Routes

Setting the Maximum Number of Equal-Cost Routes

Context

Do as follows on the switch that runs OSPFv3:

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run ospfv3 [ process-id ]

    The OSPFv3 view is displayed.

  3. Run maximum load-balancing number

    By default, load balancing is supported and a maximum of 32 equal-cost routes on the CE5800 series switches excluding CE5880EI, 128 equal-cost routes on the other modules can participate in load balancing.

    If the number of equal-cost routes is greater than number specified in the maximum load-balancing number command, routes are selected for load balancing based on the following criteria:

    1. Route priority: Routes with smaller priority values are selected for load balancing.
    2. Interface index: If routes have the same priority, those with greater interface index values are selected for load balancing.
    3. Next hop IP address: If routes have the same priority and interface index, those with larger IP addresses are selected for load balancing.

  4. (Optional) Run nexthop router-id interface-type interface-number weight value

    The preference for equal-cost routes is set.

    OSPFv3 selects a next hop from these equal-cost routes according to the weight. The smaller the weight is, the higher the route preference is.

    By default, the preference is not set for equal-cost routes. That is, equal-cost routes forward packets at the same time for load balancing.

  5. Run commit

    The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100074760

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