MLAG-LACP
Beginning in
ExtremeXOS 15.3, the
ExtremeXOS
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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