Link Aggregation And Scaling - Avaya 8600 Configuration Manual

this value is set on all ports. The global timer value overwrites the local port value irrespective
of the LACP state. You must configure any port values that differ from the global values.
Avaya Ethernet Routing Switch 8800/8600 software uses the following LACP timers:
• fast-periodic timer—200 to 20000 milliseconds (ms); default 1000 ms
• slow-periodic timer—10000 to 30000 ms; default 30000 ms
• aggregation-wait timer—200 to 2000; default 2000
You cannot aggregate a link if it does not receive an LACPDU for a period of timeout x slow
periodic time = 3 x 30 seconds = 90 seconds. If you use the fast periodic time, the timeout
period is 3 x 1000 ms = 3 seconds. You must make timer changes to all ports participating in
link aggregation and to the ports on the partnering node.
Configuration changes to the LACP timers are not reflected immediately. LACP timers do not
reset until the next time you restart LACP globally or on a port. This ensures consistency with
peer switches.
When you enable LACP on a port, the timer values are set at the port level. You must toggle
the LACP status when timer values change. This does not impact existing ports unless you
toggle the LACP status on the port.
LACP modes
LACP uses two active and passive modes.
• Active mode—ports initiate the aggregation process. Active mode ports aggregate with
other active mode ports or passive mode ports.
• Passive mode—ports participate in LACP but do not initiate the aggregation process.
Passive mode ports must be partnered with active mode ports for aggregation to occur.

Link aggregation and scaling

The following table summarizes the number of aggregation groups supported on Ethernet
Routing Switch 8800/8600 modules. Refer to the release notes included with your switch to
obtain the latest scalability information.
Table 2: Link aggregation scaling for the Avaya Ethernet Routing Switch 8800/8600
Aggregation groups
• 802.3ad aggregation groups (LAG)
• MultiLink trunk groups
Configuration — Link Aggregation, MLT, and SMLT
Feature
Link aggregation configuration considerations
Number
128
January 2012 55