Setting The Lacp Long Timeout; Monitoring And Debugging Lacp - Dell Force10 Z9000 Configuration Manual

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.
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
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 3/6 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
Debugging LACP.

Monitoring and Debugging LACP

The system log (syslog) records faulty LACP actions.
To debug LACP, use the following command.
• Debug LACP, including configuration and events.
EXEC mode
[no] debug lacp [config | events | pdu [in | out | [interface [in | out]]]]
378
Link Aggregation Control Protocol (LACP)
Monitoring and