MLAG-LACP
Beginning in EXOS 15.3, the EXOS
MLAG (Multi-switch Link Aggregation Group) 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 (Virtual LAN) 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.
Note
When LACP shared ports are configured as MLAG ports, a
LAG (Link Aggregation Group) 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.
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