Configuring The Pagp Learn Method And Priority; Configuring The Lacp Port Priority - Cisco Catalyst 2950 Software Configuration Manual

Configuring EtherChannels
Command
Step 4 show etherchannel load-balance
Step 5
copy running-config startup-config
To return EtherChannel load balancing to the default configuration, use the no port-channel
load-balance global configuration command.

Configuring the PAgP Learn Method and Priority

Network devices are classified as PAgP physical learners or aggregate-port learners. A device is a
physical learner if it learns addresses by physical ports and directs transmissions based on that
knowledge. A device is an aggregate-port learner if it learns addresses by aggregate ports.
For compatibility with Catalyst 1900 series switches, configure the Catalyst 2950 and Catalyst 2955
switch for source-MAC load distribution.
The Catalyst 2950 or Catalyst 2955 switch supports address learning only on aggregate ports even
though the physical-port keyword is provided in the command-line interface (CLI). The pagp
learn-method and the pagp port-priority interface configuration command have no effect on the switch
hardware.
You should not set the learn method to physical-port because the switch is an aggregate-learning device.
Note
If the link partner to the switch is a physical learner that has the channel-group interface configuration
command set to auto or desirable, the switch automatically uses the load-distribution method based on
the source-MAC address, regardless of the configured load distribution method.
If the link partner to the Catalyst 2950 or Catalyst 2955 switch is a physical learner that has the
channel-group interface configuration command set to on, set the load-distribution method based on the
source-MAC address by using the port-channel load-balance src-mac global configuration command.

Configuring the LACP Port Priority

You can set the priority for each port in an EtherChannel that is configured for LACP by using the
lacp port-priority privileged EXEC command. The range is from 1 to 65535. Beginning in privileged
EXEC mode, follow these steps to configure the LACP port priority:
Command
Step 1
configure terminal
Step 2 interface interface-id
Step 3 lacp port-priority priority-value
Step 4 end
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
30-12
Purpose
Verify your entries.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Specify the interface for transmission, and enter interface configuration
mode.
Select the LACP port priority value.
For priority-value, the range is 1 to 65535. By default, the priority value is
32768. The lower the range, the more likely that the interface will be used
for LACP transmission.
Return to privileged EXEC mode.
Chapter 30 Configuring EtherChannels
78-11380-12