Cisco MDS-9124 Troubleshooting Guide - Page 182

Overview of the FC-MAC Driver and the Port Manager Chapter 8 Troubleshooting Ports Send documentation comments to [email protected] Step 4 Step 5 If both ports are online, select the FLOGI tab to verify that the Fibre Channel ports for the host and storage have performed a fabric login (FLOGI) and are communicating with their respective switches. Choose FC > Name Server to verify that the assigned FC ID during FLOGI exists in the name server database. At this point the HBA and subsystem ports have successfully established link level connectivity and each one can communicate with its locally attached switch in the fabric. The next step is to verify zone membership. For a more detailed discussion and description of VSANs and zones see Chapter 14, "Troubleshooting Zones and Zone Sets." Troubleshooting Port States from the CLI To display complete information for an interface, use the show interface command. In addition to the state of the port, this command displays: • Port WWN • Speed • Trunk VSAN status • Transmit and receive buffer-to-buffer credits configured and remaining • Maximum receive buffer size • Number of frames sent and received • Transmission errors, including discards, errors, CRCs, and invalid frames Example 8-1 displays the show interface command output. Example 8-1 show interface Command Output switch# show interface fc1/3 fc1/3 is trunking Hardware is Fibre Channel, SFP is short wave laser Port WWN is 20:03:00:0b:fd:8c:f8:80 Peer port WWN is 20:10:00:0b:fd:2c:8c:00 Admin port mode is auto, trunk mode is on Port mode is TE Port vsan is 161 Speed is 2 Gbps Transmit B2B Credit is 255 Receive B2B Credit is 255 Receive data field Size is 2112 Using Port Debug Commands Use the show hardware internal debug-info interface fc CLI command to debug ports. Note To issue commands with the internal keyword, you must have an account that is a member of the network-admin group. 8-10 Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x OL-9285-05