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Log Reference

AR500, AR510, and AR530 V200R007

This document supports all the logs of device, including the parameters, meaning, possible causes and solution.

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ISIS/4/PEER_DWN_CIRC_SILENT:ISIS [process-id] neighbor [neighbor] was Down because silent is set on interface [interface-name]. The Hello packet was received at [hello-time] last time; the maximum interval for sending Hello packets was [max-interval]; the local router sent [send-number] Hello packets and received [receive-number] Hello packets; the type of the Hello packet was [packet-type].


The IS-IS neighbor went Down because the interface was configured as a silent interface.


Parameter Name Parameter Meaning
[process-id] Indicates the ID of an IS-IS process.
[neighbor] Indicates the system ID of a neighbor.
[interface-name] Indicates the name of an interface.
[hello-time] Indicates the time when a Hello packet was received last time.
[max-interval] Indicates the maximum interval for sending Hello packets.
[send-number] Indicates the number of Hello packets that were sent.
[receive-number] Indicates the number of Hello packets that were received.
[packet-type] Indicates the type of the Hello packet. The type can be
  • P2P: indicates the P2P Hello packet.

  • Lan Level-1: indicates the Hello packet in the Level-1 broadcast network.

  • Lan Level-2: indicates the Hello packet in the Level-2 broadcast network.

Possible Causes

The interface was configured as a silent interface, that is, the interface was suppressed, and thus the IS-IS neighbor went Down.


  1. Judge whether the neighbor relationship needs to be established on the interface. If so, go to Step 2; if not, go to Step 3.
  2. Run the undo isis silent command to restore the interface to the default mode.
  3. End.
Updated: 2019-05-29

Document ID: EDOC1000097294

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