Cisco WS-C3560E-48PD-SF Command Reference - Page 320
pagp port-priority
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pagp port-priority Chapter 2 Catalyst 3560 Switch Cisco IOS Commands pagp port-priority Use the pagp port-priority interface configuration command 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. pagp port-priority priority no pagp port-priority Syntax Description priority A priority number ranging from 0 to 255. Defaults The default is 128. Command Modes Interface configuration Command History Release 12.1(19)EA1 Modification This command was introduced. 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. Note The Catalyst 3560 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, such as the Catalyst 1900 switch. When the link partner to the Catalyst 3560 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. 2-288 Catalyst 3560 Switch Command Reference 78-16405-05