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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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Configuring the Overload Bit for an IS-IS Device

Configuring the Overload Bit for an IS-IS Device

If an IS-IS device needs to be temporarily isolated, configure the IS-IS device to enter the overload state to prevent other devices from forwarding traffic to this IS-IS device and prevent routing black hole.

Pre-configuration Tasks

Before configuring the overload bit for an IS-IS device, complete the following task:


  1. Run system-view

    The system view is displayed.

  2. Run isis [ process-id ]

    The IS-IS view is displayed.

  3. Run set-overload [ on-startup [ timeout1 | start-from-nbr system-id [ timeout1 [ timeout2 ] ] | wait-for-bgp [ timeout1 ] ] [ send-sa-bit [ timeout3 ] ] ][ allow { interlevel | external }* ]

    The overload bit for non-pseudonode LSPs is configured.

Verifying the Configuration

  • Run the display isis lsdb [ [ level-1 | level-2 ] | verbose | [ local | lsp-id | is-name symbolic-name ] ] * [ process-id | vpn-instance vpn-instance-name ] command to check information in the IS-IS LSDB.
Updated: 2019-12-27

Document ID: EDOC1000174069

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