Suspend Duplicate System ID Detection When Replacing a Switch

When a switch is replaced and the original system ID and nickname is used, you must wait up to 20 minutes for the LSPs with the original system to age out. This is due to duplicate system ID and nickname detection. However, you can suspend duplicate detection on the replacement switch so that you can bring the switch into the network immediately.

About this task

To temporarily disable duplicate detection on the replacement switch, perform the following steps:

Procedure

  1. Copy the configuration file of the original switch to the replacement switch.
  2. Power up the replacement switch while it is not connected to the SPB network, that is, NNI ports are not connected.
  3. Disable IS-IS on the original switch, or remove the switch from the network.
  4. On the replacement switch, enter the following Global Configuration command to suspend duplicate detection for up to 21 minutes:

    isis dup-detection-temp-disable

  5. To check the remaining time, use the show isis dup-detection-temp-disable remaining time command.
  6. Remove the original switch from the network.
  7. Connect the replacement switch to the network.