Brocade Fabric OS Troubleshooting and Diagnostics Guide v6.2.0 (53-1001187-01, April 2009)

72 Fabric OS Troubleshooting and Diagnostics Guide

53-1001187-01

Zone conflicts

Reordering the zone member list

1. Obtain the output from the cfgShow command for both switches.

2. Compare the order in which the zone members are listed. Members must be listed in the same

order.

3. Rearrange zone members so the configuration for both switches is the same. Arrange zone

members in alphabetical order, if possible.

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:

• Generates an ELS (Extended Link Service 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.

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:

• Send an ELS Accept to the ELS request.

• Send an ELS Reject to the ELS request.

• Ignore the ELS request.

There are some devices that do not support the ELS ECHO request. In these cases, the device

will either 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:

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

5 frames sent, 0 frames received, 5 frames rejected, 0 frames timeout

Round-trip min/avg/max = 0/0/0 usec

switch:admin>