Cisco Systems 3560 Manual De Usuario

You can configure the system priority for all the EtherChannels that are enabled for LACP by using the 
lacp system-priority global configuration command. You cannot configure a system priority for each 
LACP-configured channel. By changing this value from the default, you can affect how the software 
selects active and standby links.

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).

Beginning in privileged EXEC mode, follow these steps to configure the LACP system priority. This 
procedure is optional.

To return the LACP system priority to the default value, use the no lacp system-priority global 
configuration command.

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 
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.

Enter global configuration mode.

lacp system-priority priority

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.

or 

Verify your entries.

(Optional) Save your entries in the configuration file.