Pagp Port-Priority - Cisco Catalyst 3750 Command Reference Manual

Chapter 2 Catalyst 3750 Switch Cisco IOS Commands

pagp port-priority

Use the pagp port-priority interface configuration command on the switch stack or on a standalone
switch to select a port over which all Port Aggregation Protocol (PAgP) traffic through the EtherChannel
is sent. If all unused ports in the EtherChannel are in hot-standby mode, they can be placed into operation
if the currently selected port and link fails. Use the no form of this command to return to the default
setting.
Syntax Description priority
Defaults
The default is 128.
Command Modes Interface configuration
Command History Release
12.1(11)AX
Usage Guidelines The physical port with the highest priority that is operational and has membership in the same
EtherChannel is the one selected for PAgP transmission.
The Catalyst 3750 switch supports address learning only on aggregate ports even though the
Note
physical-port keyword is provided in the command-line interface (CLI). The pagp learn-method and
the pagp port-priority interface configuration commands have no effect on the switch hardware, but
they are required for PAgP interoperability with devices that only support address learning by physical
ports, such as the Catalyst 1900 switch.
When the link partner to the Catalyst 3750 switch is a physical learner, we recommend that you configure
the switch as a physical-port learner by using the pagp learn-method physical-port interface
configuration command and to set the load-distribution method based on the source MAC address by
using the port-channel load-balance src-mac global configuration command. Use the pagp
learn-method interface configuration command only in this situation.
Examples
This example shows how to set the port priority to 200:
Switch(config-if)# pagp port-priority 200
You can verify your setting by entering the show running-config privileged EXEC command or the
show pagp channel-group-number internal privileged EXEC command.
78-16181-03
pagp port-priority priority
no pagp port-priority
A priority number ranging from 0 to 255.
Modification
This command was introduced.
Catalyst 3750 Switch Command Reference
pagp port-priority
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