Users Guide

Example of Configuring a LAG Interface
Dell(conf)#interface port-channel 32
Dell(conf-if-po-32)#no shutdown
Dell(conf-if-po-32)#switchport
The LAG is in the default VLAN. To place the LAG into a non-default VLAN, use the tagged command on the
LAG.
Dell(conf)#interface vlan 10
Dell(conf-if-vl-10)#tagged port-channel 32
Configuring the LAG Interfaces as Dynamic
After creating a LAG, configure the dynamic LAG interfaces.
To configure the dynamic LAG interfaces, use the following command.
• Configure the dynamic LAG interfaces.
CONFIGURATION mode
port-channel-protocol lacp
Example of the port-channel-protocol lacp Command
Dell(conf)#interface Gigabitethernet 3/15
Dell(conf-if-gi-3/15)#no shutdown
Dell(conf-if-gi-3/15)#port-channel-protocol lacp
Dell(conf-if-gi-3/15-lacp)#port-channel 32 mode active
...
Dell(conf)#interface Gigabitethernet 3/16
Dell(conf-if-gi-3/16)#no shutdown
Dell(conf-if-gi-3/16)#port-channel-protocol lacp
Dell(conf-if-gi-3/16-lacp)#port-channel 32 mode active
...
Dell(conf)#interface Gigabitethernet 4/15
Dell(conf-if-gi-4/15)#no shutdown
Dell(conf-if-gi-4/15)#port-channel-protocol lacp
Dell(conf-if-gi-4/15-lacp)#port-channel 32 mode active
...
Dell(conf)#interface Gigabitethernet 4/16
Dell(conf-if-gi-4/16)#no shutdown
Dell(conf-if-gi-4/16)#port-channel-protocol lacp
Dell(conf-if-gi-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.
Link Aggregation Control Protocol (LACP) 504