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Configuration Guide - IP Unicast Routing

S1720, S2700, S5700, and S6720 V200R011C10

This document describes IP Unicast Routing configurations supported by the switch, including the principle and configuration procedures of IP Routing Overview, Static Route, RIP, RIPng, OSPF, OSPFv3, IS-IS(IPv4), IS-IS(IPv6), BGP, Routing Policy ,and PBR, and provides configuration examples.
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(Optional) Preventing Static Routes from Being Iterated to a Blackhole Route

(Optional) Preventing Static Routes from Being Iterated to a Blackhole Route

Context

If a link failure occurs on a network with IGP (OSPF for example), static, and blackhole routes, static routes may be iterated to a blackhole route to remain active. Static routes are preferentially selected over OSPF routes because they have a higher priority. Although active, the static routes are unreachable because they have been iterated to a blackhole route, resulting in service interruptions.

To address this problem, prevent static routes from being iterated to a blackhole route so that OSPF routes will be preferentially selected.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run ip route recursive-lookup blackhole protocol static disable

    Static routes are prevented from being iterated to a blackhole route.

    By default, static routes can be iterated to a blackhole route.

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Updated: 2019-10-21

Document ID: EDOC1000178171

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