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S600-E V200R013C00 Configuration Guide - IP Unicast Routing

This document describes the configurations of IP Unicast Routing, including IP Routing, Static Route, RIP, RIPng, OSPF, OSPFv3, Routing Policy, IP Routing Table Management, and PBR.
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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: 2019-04-08

Document ID: EDOC1100066165

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