Beginning in ExtremeXOS 15.3, the ExtremeXOS MLAG feature supports Link Aggregation Control Protocol (LACP) over MLAG ports. To do this, all MLAG peer switches use a common MAC in the System Identifier portion of the LACPDU transmitted over the MLAG ports. The following options and requirements are provided:
- The MLAG peer that has the highest IP address for the ISC control VLAN is considered the MLAG LACP master. The switch MAC of the MLAG LACP master is used as the System Identifier by all the MLAG peer switches in the LACPDUs transmitted over the MLAG ports. This is the default option.
- You can configure a common unicast MAC address for use on all the MLAG peer switches. This MAC address is used as the System Identifier by all the MLAG peer switches in the LACPDUs transmitted over the MLAG ports. This configuration is not checkpointed to the MLAG peers, and you must make sure that the same MAC address is configured on all the MLAG switches. Additionally, you must ensure that this address does not conflict with the switch MAC of the server node that teams with the MLAG peer switches.
NoteWhen LACP shared ports are configured as MLAG ports, a LAG ID change after MLAG peer reboot may result in MLAG ports being removed and re-added to the aggregator. To avoid the MLAG port flap, it is recommended to configure a common LACP MAC in both the MLAG peers using the configure mlag peer peer_name lacp-mac lacp_mac_address command.