MAC learning over CEP interfaces is similar to Layer 2 learning where the MAC advertisement route is sent to the cluster peer to synchronize the learned MAC address. MAC learning over CCEP interfaces is a two-step process in which the MAC entry is added into the MDB first. The best MAC entry is chosen and installed into the FDB and the MAC advertisement route is sent to the cluster peer for synchronization of the learned MAC address.
If a static MAC address is configured on the CEP port, it is learned as the Static MAC and the advertisement route message is sent to the peer. In this case, the ESI is set to NULL. On the peer MCT node, the MAC address programmed on the cluster peer is static towards the MCT peer.
If a static MAC address is configured on the CCEP port, a MAC advertisement route is sent to the peer. In this case, the MAC entry is associated with the ESI of the MCT client. The peer MCT node programs the MAC address as static over the local CCEP interface.
Dynamic MAC learning from the CEP is similar to basic Layer 2 MAC learning. A MAC advertisement route is sent to the peer. In this case, the ESI is set to invalid or NULL. On the peer MCT node, the MAC address programmed on the cluster peer is static towards the MCT peer.
Dynamic MAC learning from the CCEP occurs as a CCL MAC. A MAC advertisement route is sent to the peer. In this case, the MAC entry is associated with the ESI of the cluster client. The peer MCT node programs the MAC address as static over the local CCEP interface.