Cisco ME 3600X, Command Reference Manual

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Cisco ME 3800X and ME 3600X Switch Command Reference
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Chapter 2 Cisco ME 3800X and ME 3600X Switch Cisco IOS Commands
pagp port-priority
pagp port-priority
To select a port over which all Port Aggregation Protocol (PAgP) traffic through the EtherChannel is
sent, use the
pagp port-priority command in interface configuration mode. 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. To return to the default setting, use the
no form of this command.
pagp port-priority priority
no pagp port-priority
Syntax Description
Defaults The default is 128.
Command Modes Interface configuration
Command History
Usage Guidelines The physical port with the highest operational priority and that has membership in the same
EtherChannel is the one selected for PAgP transmission.
•
The 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 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.
•
When the link partner to the 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.
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.
Examples
This example shows how to set the port priority to 200:
Switch(config-if)# pagp port-priority 200
priority A priority number ranging from 0 to 255.
Release Modification
12.2(52)EY This command was introduced.