Cisco nexus 5000 series Cli Configuration Manual page 648

Troubleshooting Fibre Channel
S e n d f e e d b a c k t o n x 5 0 0 0 - d o c f e e d b a c k @ c i s c o . c o m
The trace frame is routed normally through the network until it reaches the far edge of the fabric. When
the frame reaches the edge of the fabric (the F port connected to the end node with the given port WWN
or the FC ID), the frame is looped back (swapping the source ID and the destination ID) to the originator.
If the destination cannot be reached, the path discovery starts, which traces the path up to the point of
failure.
Note The fctrace feature works only on TE ports. Make sure that only TE ports exist in the path to the
destination. If there is an E port in the path, the fctrace frame is dropped by that switch. Also, fctrace
times out in the originator, and path discovery does not start.
To perform the fctrace operation, perform one of these tasks:
Command
switch# fctrace fcid 0xd70000 vsan 1
Route present for :
20:00:00:0b:46:00:02:82(0xfffcd5)
Timestamp Invalid.
20:00:00:05:30:00:18:db(0xfffcd7)
Timestamp Invalid.
20:00:00:05:30:00:18:db(0xfffcd7)
switch# fctrace pwwn 21:00:00:e0:8b:06:d9:1d vsan 1
timeout 5
Route present for : 21:00:00:e0:8b:06:d9:1d
20:00:00:0b:46:00:02:82(0xfffcd5)
Timestamp Invalid.
20:00:00:05:30:00:18:db(0xfffcd7)
Timestamp Invalid.
20:00:00:05:30:00:18:db(0xfffcd7)
switch# fctrace device-alias disk1 v 1
Route present for : 22:00:00:0c:50:02:ce:f8
20:00:00:05:30:00:31:1e(0xfffca9)
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
1-6
0xd70000
Chapter 1
Purpose
Invokes fctrace for the specified FC ID of
the destination N port.
Invokes fctrace using the pWWN of the
destination N port.
By default the period to wait before
timing out is 5 seconds, The range is from
one through 10 seconds.
Invokes fctrace using the device alias of
the destination N port.
Troubleshooting
OL-16597-01