Lacp Parameters Configuration Considerations - Avaya 8600 Configuration Manual

Link aggregation fundamentals

LACP parameters configuration considerations

You can configure priorities, keys, modes, and timers for the LACP.
Navigation
• LACP priority
• LACP keys
• LACP timers
• LACP modes
LACP priority
You can configure LACP priority at the system and port level as follows:
• Port priority—determines which ports are aggregated into the LAG that has more than eight
ports configured to it, as in a standby-port configuration.
• System priority—generates the switch ID when communicating with other switches. For
SMLT applications, use a system priority to determine a master–slave relationship between
the SMLT switches. Avaya recommends that you use the default value. If you need to change
it, first disable the LACP and then enable it again after you change the value.
LACP keys
LACP keys are used to determine which ports are eligible for link aggregation. The LACP keys
are defined by the ports when the MultiLink trunk is configured. The ports key which match the
MLT key can be aggregated into that MultiLink trunk.
• Keys do not have to match between two LACP peers.
• Keys do not have to match on SMLT core switches when you use LACP with SMLT.
LACP timers
You can customize failover times by changing the LACP timer attributes (fast periodic time,
slow periodic time, and aggregate wait time). Values are set by default to match the IEEE
802.3ad values. If you change the values, they must match on the ports participating in
aggregation between two devices.
Changes to LACP timer values at the global level are reflected on all ports. However, you can
change the LACP timer values for each port level. When you change an LACP timer globally,
54 Configuration — Link Aggregation, MLT, and SMLT
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January 2012