HP StorageWorks 8/8 Brocade Converged Enhanced Ethernet Administrator's Guide - Page 98
Clearing LACP counter statistics on a LAG, Displaying LACP information, LACP troubleshooting tips
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6 LACP troubleshooting tips Example switch(conf-if-te-0/1)#lacp timeout short Clearing LACP counter statistics on a LAG To clear LACP counter statistics, perform the following task from Privileged EXEC mode. 1. Enter the clear command to clear the LACP counter statistics for the specified LAG group number. Example of clearing counter statistics on LAG group 42 switch#clear lacp 42 counters Clearing LACP counter statistics on all LAG groups To clear LACP counter statistics, perform the following task from Privileged EXEC mode. 1. Enter the clear command to clear the LACP counter statistics for all LAG groups. switch#clear lacp counters Displaying LACP information Use the show command to display LACP statistics and configuration information. See the Converged Enhanced Ethernet Command Reference for information. 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 counters port-channel-num 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." 78 Converged Enhanced Ethernet Administrator's Guide 53-1001346-01