Configuring The Lacp Port Priority - Cisco Catalyst 2975 Software Configuration Manual
Ios release 12.2(55)se
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- Hardware installation manual (62 pages) ,
- Brochure (19 pages) ,
- Getting started manual (17 pages)
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Chapter 37
Configuring EtherChannels and Link-State Tracking
Beginning in privileged EXEC mode, follow these steps to configure the LACP system priority. This
procedure is optional.
Command
Step 1
configure terminal
Step 2
lacp system-priority priority
Step 3
end
Step 4
show running-config
or
show lacp sys-id
Step 5
copy running-config startup-config
To return the LACP system priority to the default value, use the no lacp system-priority global
configuration command.
Configuring the LACP Port Priority
By default, all ports use the same port priority. If the local system has a lower value for the system
priority and the system ID than the remote system, you can affect which of the hot-standby links become
active first by changing the port priority of LACP EtherChannel ports to a lower value than the default.
The hot-standby ports that have lower port numbers become active in the channel first. You can use the
show etherchannel summary privileged EXEC command to see which ports are in the hot-standby
mode (denoted with an H port-state flag).
If LACP is not able to aggregate all the ports that are compatible (for example, the remote system might
Note
have more restrictive hardware limitations), all the ports that cannot be actively included in the
EtherChannel are put in the hot-standby state and are used only if one of the channeled ports fails.
Beginning in privileged EXEC mode, follow these steps to configure the LACP port priority. This
procedure is optional.
Command
Step 1
configure terminal
Step 2
interface interface-id
Step 3
lacp port-priority priority
Step 4
end
OL-19720-02
Purpose
Enter global configuration mode.
Configure the LACP system priority.
For priority, the range is 1 to 65535. The default is 32768.
The lower the value, the higher the system priority.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Specify the port to be configured, and enter interface configuration
mode.
Configure the LACP port priority.
For priority, the range is 1 to 65535. The default is 32768. The lower the
value, the more likely that the port will be used for LACP transmission.
Return to privileged EXEC mode.
Catalyst 2975 Switch Software Configuration Guide
Configuring EtherChannels
37-19
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