This condition is generated by the Ethernet bridging process (eswd) when STP (Spanning Tree Protocol) cannot derive the base MAC (Media Access Control) address of the system.

The ESWD_STP_BASE_MAC_ERROR message is logged each time the Ethernet bridging process STP functionality failed to derive the base MAC address of the system.

When a ESWD_STP_BASE_MAC_ERROR event occurs, a message similar to the following is reported:

The cause may be due to either the eswd process handling of STP or hardware not able to provide the MAC address.

Examine the following output to help determine the cause of this message:

Look for any related events that occurred at or just before the ESWD_STP_BASE_MAC_ERROR message.

Perform these steps:

  1. During a maintenance window, as it will impact transit traffic, try restarting the eswd process. For more information on restarting a process, refer to Restart a Junos Software Process..

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