Configuration Guide User guide

724 FastIron Configuration Guide
53-1002494-02
Dynamic link aggregation
As shown in Table 136, all or a subset of the ports within a port range will be eligible for formation
into an aggregate link based on port states. Notice that the sets of ports that are eligible for the
aggregate link must be valid static trunk configurations.
Enabling dynamic link aggregation
By default, link aggregation is disabled on all ports. To enable link aggregation on a set of ports,
enter commands such as the following at the Interface configuration level of the CLI.
NOTE
Configuration commands for link aggregation differ depending on whether you are using the default
link aggregation key automatically assigned by the software, or if you are assigning a different,
unique key. For more information about keys, refer to “Key” on page 726.
Using the default key assigned by the software
Brocade(config)#interface ethernet 1/1
Brocade(config-if-e1000-1/1)#link-aggregate active
Brocade(config)#interface ethernet 1/2
Brocade(config-if-e1000-1/2)#link-aggregate active
The commands in this example enable the active mode of link aggregation on ports 1/1 and 1/2.
The ports can send and receive LACPDU messages. Note that these ports will use the default key,
because one has not been explicitly configured.
NOTE
In conformance with the 802.3ad specification, the default key assigned to an aggregate link is
based on the port type (1 Gbps port or 10 Gbps port). The Brocade device assigns different keys to
10 Gbps ports than to 1 Gbps ports so that ports with different physical capabilities will not be able
to form a trunk.
Assigning a unique key
Brocade(config)#interface ethernet 1/1
Brocade(config-if-e1000-1/1)#link-aggregate configure key 10000
Brocade(config-if-e1000-1/1)#link-aggregate active
Brocade(config)#interface ethernet 1/2
Brocade(config-if-e1000-1/2)#link-aggregate configure key 10000
Brocade(config-if-e1000-1/2)#link-aggregate active
The commands in this example assign the key 10000 and enable the active mode of link
aggregation on ports 1/1 and 1/2. The ports can send and receive LACPDU messages.
NOTE
As shown in the example, when configuring a key, you must assign the key prior to enabling link
aggregation.
The following commands enable passive link aggregation on ports 1/5 through 1/8.
Brocade(config)#interface ethernet 1/5 to 1/8
Brocade(config-mif-1/5-1/8)#link-aggregate passive
The commands in this example enable the passive mode of link aggregation on ports 1/5 through
1/8. These ports wait for the other end of the link to contact them. After this occurs, the ports can
send and receive LACPDU messages.