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CLI-based Configuration Guide - IP Unicast Routing

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R009

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(Optional) Preventing Static Routes from Being Iterated to a Black-Hole Route

(Optional) Preventing Static Routes from Being Iterated to a Black-Hole Route

Context

If a link failure occurs on a network with IGP (OSPF for example), static, and black-hole routes, the static routes may be iterated to the black-hole route to remain active. Therefore, the static routes are preferentially selected over the OSPF routes because of a higher priority. Although active, the static routes are unreachable because they have been iterated to the black-hole route. As a result, services are interrupted. To address this problem, prevent the static routes from being iterated to the black-hole route so that the OSPF routes can 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 have been prevented from being iterated to the black-hole route.

    By default, static routes can be iterated to a black-hole route.

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Updated: 2019-05-17

Document ID: EDOC1000174069

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