Users Guide

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
conguration 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 congure the default timeout value to be 30 seconds. Invoking the longer timeout might prevent the LAG from apping
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 eect.
To congure 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
Partner System ID: Priority 32768, Address 0001.e801.45a5
Actor Admin Key 1, Oper Key 1, Partner Oper Key 1
LACP LAG 1 is an aggregatable link
A - Active LACP, B - Passive LACP, C - Short Timeout, D - Long Timeout
E - Aggregatable Link, F - Individual Link, G - IN_SYNC, H - OUT_OF_SYNC
I - Collection enabled, J - Collection disabled, K - Distribution enabled L -
Distribution disabled,
M - Partner Defaulted, N - Partner Non-defaulted, O - Receiver is in expired
state,
P - Receiver is not in expired state
Port Te 10/6 is enabled, LACP is enabled and mode is lacp
Actor Admin: State ADEHJLMP Key 1 Priority 128
To view the PDU exchanges and the timeout value, use the debug lacp command. For more information, refer to Monitoring and
Debugging LACP.
Monitoring and Debugging LACP
The system log (syslog) records faulty LACP actions.
To debug LACP, use the following command.
550
Link Aggregation Control Protocol (LACP)