Brocade Network OS Administrator’s Guide v4.1.1 - Manual (Page 446)

Clearing LACP counter statistics on a LAG
This topic describes how to clear LACP counter statistics on a single LAG.
Enter clear lacp LAG_group_number counters to clear the LACP counter statistics for the
specified LAG group number.
switch# clear lacp 42 counters
Clearing LACP counter statistics on all LAG groups
This topic describes how to clear the LACP counter statistics for all LAG groups.
Enter clear lacp counter to clear the LACP counter statistics for all LAG groups.
switch# clear lacp counter
Displaying LACP information
You can use the show command in Privileged EXEC mode to display Link Aggregation Control
Protocol (LACP) information.
• Enter show lacp sys-id to display the LACP system ID and priority.
switch# show lacp sys-id
% System 8000,00-05-1e-76-1a-a6
• Enter show lacp counter to display the LACP system ID and priority.
switch# show lacp counter
Traffic Statistics
Port LACPDUs Marker Pckt err
Sent Recv Sent Recv Sent Recv
12 123 0 2 0 0 0
Refer to the Network OS Command Reference for information.
Troubleshooting LACP
To troubleshoot problems with your LACP configuration, use the following troubleshooting tips.
If a standard IEEE 802.3ad-based dynamic trunk is configured on a link and the link is not able to join
the LAG, do the following:
• Make sure that both ends of the link are configured as standard for the trunk type.
• Make sure that both ends of the link are not configured for passive mode. They must be configured
as active /active, active /passive, or passive /active.
• Make sure that the port-channel interface is in the administrative "up" state by ensuring that the no
shutdown command was entered on the interface on both ends of the link.
• Make sure the speed parameter is configured to 1000 if the port-channel is using the gigabit
interface.
• Make sure that the links that are part of the LAG are connected to the same neighboring switch.
• Make sure that the system ID of the switches connected by the link is unique. You can verify this by
entering the show lacp sys-id command on both switches.
• You can verify the system ID of the switches in the Brocade VCS Fabric cluster with the show lacp
sys-id command.
• Make sure that LACPDUs are being received and transmitted on both ends of the link and that there
are no error PDUs. You can verify this by entering the show lacp counters number command and
looking at the receive mode (rx) and transmit mode (tx) statistics. The statistics should be
incrementing and should not be at zero or a fixed value. If the PDU rx count is not incrementing,
check the interface for possible CRC errors by entering the show interface link-name command on
the neighboring switch. If the PDU tx count is not incrementing, check the operational status of the
link by entering the show interface link-name command and verifying that the interface status is
"up."
Clearing LACP counter statistics on a LAG
446 Network OS Administrator’s Guide
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