Brocade Converged Enhanced Ethernet Administrator's Guide v6.1.2_cee (53-1001258-01, June 2009)

Table Of Contents
76 Converged Enhanced Ethernet Administrator’s Guide
53-1001258-01
LACP troubleshooting tips
5
Displaying LACP information
To display LACP information, perform the following tasks from Privileged EXEC mode:
LACP troubleshooting tips
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:
- 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 either 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 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. This can be
verified by entering the show lacp sys-id command on both switches.
- Make sure that LACPDUs are being received and transmitted on both ends of the link and
that there are no error PDUs. This can be verified by entering the show lacp
port-channel-num counters command and looking at the rx and 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.”
Task Command
Display the LACP counter statistics for the
specified LAG group number.
switch#show lacp counter 1-63
Display the LACP system ID. switch#show lacp sys-id
Display the LACP configuration for the specified
port.
switch#show port port-channel
tengigabitethernet Slot/Port
Display the following LACP information:
detail
load-balance
summary
switch#show port-channel [1-63]
[detail | load-balance | summary]