Administrator Guide

Creating a LAG
To create a dynamic port channel (LAG), use the following command. First you define the LAG and then the LAG interfaces.
● Create a dynamic port channel (LAG).
CONFIGURATION mode
interface port-channel
● Create a dynamic port channel (LAG).
CONFIGURATION mode
switchport
The following example shows 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
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
Link Aggregation Control Protocol (LACP)
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