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14 Link Aggregation
14.4 Configuration of the link aggregation extended functionality
14.4.1 List of configuration commands
The following table describes the commands used to configure the link aggregation
extended functionality.
Table 14-6 List of configuration commands
Command name
channel-group lacp
system-priority
channel-group max-active-port
lacp port-priority
lacp system-priority
14.4.2 Configuration of the standby link functionality
Points to note
The standby link functionality is used to enable a channel group, and to set the
maximum number of active ports in the channel group. In addition, either link-down
mode or link-not-down mode can be set. The standby link functionality is available
only when static link aggregation is used.
Standby ports are set on a port priority basis, whereby a port with a lower priority
level is selected for a standby link earlier. Note that the smaller the port priority value,
the higher its priority.
Command examples
1.
(config)# interface port-channel 3
Changes the mode to port channel interface configuration mode for channel group 3.
2.
(config-if)# channel-group max-active-port 3
Enables the standby link functionality for channel group 3, and sets the maximum
number of active ports in channel group to
mode.
3.
(config-if)# exit
Changes the mode to global configuration mode.
4.
(config)# interface port-channel 5
(config-if)# channel-group max-active-port 1 no-link-down
(config-if)# exit
Changes the mode to port channel interface configuration mode for channel group 5,
enables the standby link functionality for the channel group, sets the maximum
number of active ports to
5.
(config)# interface fastethernet 0/1
(config-if)# channel-group 5 mode on
(config-if)# lacp port-priority 300
(config-if)# exit
228
Description
Sets the system priority for a channel group.
Enables the standby link functionality, and sets how many ports in the
channel group can be used for link aggregation.
Sets the port priority. The port priority is used to select standby links.
Sets the default value for the system priority.
1
, and sets link-not-down mode.
3
. Channel group 3 operates in link-down
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