Configuration Guide User guide

730 FastIron Configuration Guide
53-1002494-02
Dynamic link aggregation
Brocade(config)#interface ethernet 1/1 to 1/4
Brocade(config-mif-1/1-1/4)#link-aggregate off
Brocade(config-mif-1/1-1/4)#link-aggregate configure key 10000
Brocade(config-mif-1/1-1/4)#link-aggregate active
Brocade(config-mif-1/1-1/4)#interface ethernet 3/5 to 3/8
Brocade(config-mif-3/5-3/8)#link-aggregate off
Brocade(config-mif-3/5-3/8)#link-aggregate configure key 10000
Brocade(config-mif-3/5-3/8)#link-aggregate active
These commands change the key for ports 1/1 through 1/4 and 3/5 through 3/8 to 10000.
Because all ports in an aggregate link must have the same key, the command in this example
enables ports 1/1 through 1/4 and 3/5 through 3/8 to form a multi-slot aggregate link.
Syntax: [no] link-aggregate configure [system-priority <num>] | [port-priority <num>] | [key
<num>]
The system-priority <num> parameter specifies the Brocade device link aggregation priority. A
higher value indicates a lower priority. You can specify a priority from 0 through 65535. The default
is 1.
The port-priority <num> parameter specifies an individual port priority within the port group. A
higher value indicates a lower priority. You can specify a priority from 0 through 65535. The default
is 1.
The key <num> parameter identifies the group of ports that are eligible to be aggregated into a
trunk group. The software automatically assigns a key to each group of ports. The software assigns
the keys in ascending numerical order, beginning with 0. You can change a port group key to a
value from 10000 through 65535.
Configuring port timeout
You can control the time it takes to remove ports from a trunk with link aggregation enabled by
configuring the link aggregated port with a “short” timeout mode. Once a port is configured with a
timeout mode, it will remain in that timeout mode whether it is up or down or whether it is part of a
trunk.
All ports in a trunk should have the same timeout mode, which is checked when link aggregation is
enabled on ports.
To configure a port with a short timeout mode, enter a command such as the following.
Brocade(config)#interface ethernet8/1
Brocade(config-if-e1000-8/1)#link-aggregate configure timeout short
Syntax: [no] link-aggregate configure timeout [short]
If the timeout mode is not configured for a port and link aggregation is enabled, the port starts with
a short timeout mode. Once a trunk is formed, the timeout mode is changed to the long timeout
mode. The value for “long” and “short” is displayed in the output for the show link-aggregate
command.
NOTE
LACP short timeout mode is not supported on FESX combination copper ports. If these ports are
configured with a short timeout mode, the ports will flap and will not be aggregated into a trunk
group.