Checking For Fibre Channel Connectivity Problems - Brocade Communications Systems StoreFabric SN6500B Troubleshooting Manual

9

Checking for Fibre Channel connectivity problems

Enter the fcPing command (refer to the Fabric OS Command Reference for more information on
this command), which checks the zoning configuration for the two ports specified by:
•
•
Regardless of the device's zoning, the fcPing command sends the ELS frame to the destination
port. A device can take any of the following actions:
•
•
•
There are some devices that do not support the ELS ECHO request. In these cases, the device
either does not respond to the request or send an ELS reject. When a device does not respond to
the ELS request, further debugging is required; however, do not assume that the device is not
connected to the Fibre Channel.
Following is sample output from the fcPing command in which one device accepts the request and
another device rejects the request:
Following is sample output from the fcPing command in which one device accepts the request and
another device does not respond to the request:
78
Zone conflicts
Generates an Extended Link Service (ELS) frame ECHO request to the source port specified
and validates the response.
Generates an ELS ECHO request to the destination port specified and validates the response.
Send an ELS Accept to the ELS request.
Send an ELS Reject to the ELS request.
Ignore the ELS request.
switch:admin> fcping 10:00:00:00:c9:29:0e:c4 21:00:00:20:37:25:ad:05
Source: 10:00:00:00:c9:29:0e:c4
Destination: 21:00:00:20:37:25:ad:05
Zone Check: Not Zoned
Pinging 10:00:00:00:c9:29:0e:c4 [0x20800] with 12 bytes of date:
received reply from 10:00:00:00:c9:29:0e:c4: 12 bytes time:1162 usec
received reply from 10:00:00:00:c9:29:0e:c4: 12 bytes time:1013 usec
received reply from 10:00:00:00:c9:29:0e:c4: 12 bytes time:1442 usec
received reply from 10:00:00:00:c9:29:0e:c4: 12 bytes time:1052 usec
received reply from 10:00:00:00:c9:29:0e:c4: 12 bytes time:1012 usec
5 frames sent, 5 frames received, 0 frames rejected, 0 frames timeout
Round-trip min/avg/max = 1012/1136/1442 usec
Pinging 21:00:00:20:37:25:ad:05 [0x211e8] with 12 bytes of data:
Request rejected
Request rejected
Request rejected
Request rejected
Request rejected
5 frames sent, 0 frames received, 5 frames rejected, 0 frames timeout
Round-trip min/avg/max = 0/0/0 usec
switch:admin>
switch:admin> fcping 0x020800 22:00:00:04:cf:75:63:85
Source: 0x20800
Destination: 22:00:00:04:cf:75:63:85
Zone Check: Zoned
Pinging 0x020800 with 12 bytes of data:
received reply from 0x020800: 12 bytes time:1159 usec
Fabric OS Troubleshooting and Diagnostics Guide
53-1002751-01