Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 582

• Configure the dynamic LAG interfaces. CONFIGURATION mode port-channel-protocol lacp Example of the port-channel-protocol lacp Command Dell(conf)#interface Tengigabitethernet 3/15 Dell(conf-if-te-3/15)#no shutdown Dell(conf-if-te-3/15)#port-channel-protocol lacp Dell(conf-if-te-3/15-lacp)#port-channel 32 mode active ... Dell(conf)#interface Tengigabitethernet 3/16 Dell(conf-if-te-3/16)#no shutdown Dell(conf-if-te-3/16)#port-channel-protocol lacp Dell(conf-if-te-3/16-lacp)#port-channel 32 mode active ... Dell(conf)#interface Tengigabitethernet 4/15 Dell(conf-if-te-4/15)#no shutdown Dell(conf-if-te-4/15)#port-channel-protocol lacp Dell(conf-if-te-4/15-lacp)#port-channel 32 mode active ... Dell(conf)#interface Tengigabitethernet 4/16 Dell(conf-if-te-4/16)#no shutdown Dell(conf-if-te-4/16)#port-channel-protocol lacp Dell(conf-if-te-4/16-lacp)#port-channel 32 mode active The port-channel 32 mode active command shown here may be successfully issued as long as there is no existing static channel-member configuration in LAG 32. Setting the LACP Long Timeout PDUs are exchanged between port channel (LAG) interfaces to maintain LACP sessions. PDUs are transmitted at either a slow or fast transmission rate, depending upon the LACP timeout value. The timeout value is the amount of time that a LAG interface waits for a PDU from the remote system before bringing the LACP session down. The default timeout value is 1 second. You can configure the default timeout value to be 30 seconds. Invoking the longer timeout might prevent the LAG from flapping if the remote system is up but temporarily unable to transmit PDUs due to a system interruption. NOTE: The 30-second timeout is available for dynamic LAG interfaces only. You can enter the lacp long-timeout command for static LAGs, but it has no effect. To configure LACP long timeout, use the following command. • Set the LACP timeout value to 30 seconds. CONFIG-INT-PO mode lacp long-timeout Example of the lacp long-timeout and show lacp Commands Dell(conf)# interface port-channel 32 Dell(conf-if-po-32)#no shutdown Dell(conf-if-po-32)#switchport Dell(conf-if-po-32)#lacp long-timeout Dell(conf-if-po-32)#end Dell# show lacp 32 Port-channel 32 admin up, oper up, mode lacp Actor System ID: Priority 32768, Address 0001.e800.a12b 582 Link Aggregation Control Protocol (LACP)