Catalyst 3750-E and 3560-E Switch Cisco IOS ... - DNIP . NET

pagp port-priorityChapter 2Catalyst 3750-E and 3560-E Switch Cisco IOS Commandspagp port-priorityUse the pagp port-priority interface configuration command on the switch stack or on a standaloneswitch to select a port over which all Port Aggregation Protocol (PAgP) traffic through the EtherChannelis sent. If all unused ports in the EtherChannel are in hot-standby mode, they can be placed into operationif the currently selected port and link fails. Use the no form of this command to return to the defaultsetting.pagp port-priority priorityno pagp port-prioritySyntax Descriptionpriority A priority number ranging from 0 to 255.Defaults The default is 128.Command ModesInterface configurationCommand HistoryRelease12.2(35)SE2ModificationThis command was introduced.Usage GuidelinesThe physical port with the highest priority that is operational and has membership in the sameEtherChannel is the one selected for PAgP transmission.NoteThe switch supports address learning only on aggregate ports even though the physical-port keyword isprovided in the command-line interface (CLI). The pagp learn-method and the pagp port-priorityinterface configuration commands have no effect on the switch hardware, but they are required for PAgPinteroperability with devices that only support address learning by physical ports, such as theCatalyst 1900 switch.When the link partner to the switch is a physical learner, we recommend that you configure the switchas a physical-port learner by using the pagp learn-method physical-port interface configurationcommand and to set the load-distribution method based on the source MAC address by using theport-channel load-balance src-mac global configuration command. Use the pagp learn-methodinterface configuration command only in this situation.Examples This example shows how to set the port priority to 200:Switch(config-if)# pagp port-priority 200You can verify your setting by entering the show running-config privileged EXEC command or theshow pagp channel-group-number internal privileged EXEC command.2-414Catalyst 3750-E and 3560-E Switch Command ReferenceOL-9776-08