Configuring The Pagp Learn Method And Priority; Displaying Etherchannel And Pagp Status - Cisco Catalyst 2950 Software Manual

Chapter 10 Configuring the Switch Ports
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 switches for
souce-MAC load distribution.
The Catalyst 2950 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 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.

Displaying EtherChannel and PAgP Status

You can use the user EXEC commands described in
information:
Table 10-3 Commands for Displaying EtherChannel and PAgP Status
Command
show etherchannel [channel-group-number] {brief |
detail | load-balance | port | port-channel | summary}
show pagp {channel-group-number} {counters |
1
internal | neighbor}
1. You can clear PAgP channel-group information and traffic filters by using the clear pagp {channel-group-number | counters} privileged EXEC
command.
For detailed information about the fields in the displays, refer to the Catalyst 2950 Desktop Switch
Command Reference for this release.
78-11380-03
Purpose
Verify your entries.
(Optional) Save your entries in the configuration file.
Table 10-3 to display EtherChannel and PAgP status
Description
Displays EtherChannel information in a brief, detailed, and
one-line summary form. Also displays the load-balance or
frame-distribution scheme, port, and port-channel information.
Displays PAgP information such as traffic information, the
internal PAgP configuration, and neighbor information.
Catalyst 2950 Desktop Switch Software Configuration Guide
Displaying EtherChannel and PAgP Status
10-17