HP StorageWorks 2.128 SAN Director Switch - Manual (Page 137)

Fabric OS 5.x administrator guide 137
Viewing the port log
Fabric OS maintains an internal log of all port activity. The port log stores entries for each port as a
circular buffer. Each port has space to store 8000 log entries. When the log is full, the newest log entries
overwrite the oldest log entries. Port logs are not persistent and are lost over power-cycles and reboots. If
the port log is disabled, an error message is displayed.
NOTE: Port log functionality is completely separate from the system message log. Port logs are typically
used to troubleshoot device connections.
1. Connect to the switch and log in as admin.
2. Issue the
portLogShow
command:
Use the commands summarized in Table 21 to view and manage port logs. See the HP StorageWorks
Fabric OS 5.x diagnostics and system error messages reference guide for additional information about
these commands.
The
portLogDump
command output (trace) is a powerful tool that is used to troubleshoot fabric issues.
The
portLogDump
output provides detailed information about the actions and communications within a
fabric. By understanding the processes that are taking place in the fabric, issues can be identified and
located.
The
portLogDump
command displays the port log, showing a portion of the Fibre Channel payload and
header (FC-PH). The header contains control and addressing information associated with the frame. The
payload contains the information being transported by the frame and is determined by the higher-level
service or FC_4 upper-level protocol. There are many different payload formats based on the protocol.
switch:admin> portlogshow 12
time task event port cmd args
-------------------------------------------------
Thu Apr 14 12:07:09 2005
12:07:09.350 PORT Rx 0 40 02fffffd,00fffffd,0608ffff,14000000
12:07:09.350 PORT Tx 0 0 c0fffffd,00fffffd,060807fc
12:07:10.812 PORT Tx 0 40 02fffffd,00fffffd,07feffff,14000000
12:07:10.813 PORT Rx 0 0 c0fffffd,00fffffd,07fe0627
12:07:19.492 PORT Tx 4 40 02fffffd,00fffffd,0800ffff,14000000
12:07:19.492 PORT Tx 22 40 02fffffd,00fffffd,0802ffff,14000000
12:07:19.493 PORT Rx 4 0 c0fffffd,00fffffd,08009287
12:07:19.493 PORT Tx 24 40 02fffffd,00fffffd,0804ffff,14000000
12:07:19.494 PORT Tx 31 40 02fffffd,00fffffd,0806ffff,14000000
12:07:19.494 PORT Rx 22 0 c0fffffd,00fffffd,0802928d
12:07:19.494 PORT Rx 24 0 c0fffffd,00fffffd,080492a3
12:07:19.495 PORT Rx 31 0 c0fffffd,00fffffd,080692a7
Table 21 Commands for port log management
Command Description
portLogClear
Clear port logs for all or particular ports.
portLogDisable
Disable port logs for all or particular ports.
portLogDump
Display port logs for all or particular ports, without page breaks.
portLogEnable
Enable port logs for all or particular ports.
portLogShow
Display port logs for all or particular ports, with page breaks.