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Configuring MAC Pinning on Access Interfaces for Bridge Domains

A MAC move occurs when a MAC address frequently appears on a different physical interface than the one it was learned on. Frequent MAC moves indicate the presence of loops. To avoid loops across interfaces in bridge domains, you can configure MAC pinning.

This topic describes how to configure MAC pinning on an access interface in a bridge domain. A logical interface configured to accept untagged packets is called an access interface or access port. When an access interface receives a tagged or an untagged packet, the interface’s VLAN ID is added to the packet. The packet is then forwarded within the bridge domain that is configured with the matching VLAN ID.

To configure MAC pinning on access interfaces in bridge domains:

  1. Configure the interface as an access interface and specify the VLAN ID at the [edit interfaces] hierarchy level.
  2. Configure MAC pinning on the interface by including the mac-pinning statement at the [edit bridge-domains] hierarchy level.
  3. In configuration mode, verify the configuration.