Cisco Systems 3560 사용자 설명서

To return the priority to its default setting, use the no pagp port-priority interface configuration 
command. To return the learning method to its default setting, use the no pagp learn-method interface 
configuration command.

When enabled, LACP tries to configure the maximum number of LACP-compatible ports in a channel, 
up to a maximum of 16 ports. Only eight LACP links can be active at one time. The software places any 
additional links in a hot-standby mode. If one of the active links becomes inactive, a link that is in the 
hot-standby mode becomes active in its place. 

If you configure more than eight links for an EtherChannel group, the software automatically decides 
which of the hot-standby ports to make active based on the LACP priority. To every link between 
systems that operate LACP, the software assigns a unique priority made up of these elements (in priority 
order):

LACP system priority

System ID (the switch MAC address)

LACP port priority

Port number

In priority comparisons, numerically lower values have higher priority. The priority decides which ports 
should be put in standby mode when there is a hardware limitation that prevents all compatible ports 
from aggregating.

Determining which ports are active and which are hot standby is a two-step procedure. First the system 
with a numerically lower system priority and system-id is placed in charge of the decision. Next, that 
system decides which ports are active and which are hot standby, based on its values for port priority 
and port number. The port-priority and port-number values for the other system are not used.

You can change the default values of the LACP system priority and the LACP port priority to affect how 
the software selects active and standby links. For more information, see the 

 and the 

pagp port-priority priority

Assign a priority so that the selected port is chosen for packet 
transmission.

For priority, the range is 0 to 255. The default is 128. The higher 
the priority, the more likely that the port will be used for PAgP 
transmission.

Return to privileged EXEC mode.

or 

show pagp channel-group-number internal

Verify your entries.

(Optional) Save your entries in the configuration file.