Cisco Nexus 5000 Series Switch CLI Software Configuration Guide, NX-OS 4.0(1a)N1 (OL-16597-01, January 2009)

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Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
OL-16597-01
Chapter 50 Troubleshooting
Troubleshooting Fibre Channel
fcping
The fcping feature verifies reachability of a node by checking its end-to-end connectivity. You can
invoke the fcping feature by providing the FC ID, the destination port WWN, or the device alias
information.
To perform a fcping operation, perform this task:
Verifying Switch Connectivity
You can verify connectivity to a destination switch.
Command Purpose
Step 1
switch# fcping fcid 0xd70000 vsan 1
28 bytes from 0xd70000 time = 730 usec
28 bytes from 0xd70000 time = 165 usec
28 bytes from 0xd70000 time = 262 usec
28 bytes from 0xd70000 time = 219 usec
28 bytes from 0xd70000 time = 228 usec
5 frames sent, 5 frames received, 0 timeouts
Round-trip min/avg/max = 165/270/730 usec
Invokes fcping for the specified
pWWN or the FC ID of the
destination. By default, five frames are
sent.
switch# fcping fcid 0xd70000 vsan 1 count 10
28 bytes from 0xd70000 time = 730 usec
28 bytes from 0xd70000 time = 165 usec
28 bytes from 0xd70000 time = 262 usec
28 bytes from 0xd70000 time = 219 usec
28 bytes from 0xd70000 time = 228 usec
28 bytes from 0xd70000 time = 230 usec
28 bytes from 0xd70000 time = 230 usec
28 bytes from 0xd70000 time = 225 usec
28 bytes from 0xd70000 time = 229 usec
28 bytes from 0xd70000 time = 183 usec
10 frames sent, 10 frames received, 0 timeouts
Round-trip min/avg/max = 165/270/730 usec
Sets the number of frames to be sent
using the count option. The range is
from 0 through 2147483647. A value
of 0 causes the command to send
frames forever.
switch# fcping fcid 0xd500b4 vsan 1 timeout 10
28 bytes from 0xd500b4 time = 1345 usec
...
5 frames sent, 5 frames received, 0 timeouts
Round-trip min/avg/max = 340/581/1345 usec
Sets the timeout value. The default
period to wait is 5 seconds. The range
is from 1 through 10 seconds.
switch# fcping device-alias disk1 vsan 1
28 bytes from 22:00:00:0c:50:02:ce:f8 time = 1883 usec
28 bytes from 22:00:00:0c:50:02:ce:f8 time = 493 usec
28 bytes from 22:00:00:0c:50:02:ce:f8 time = 277 usec
28 bytes from 22:00:00:0c:50:02:ce:f8 time = 391 usec
28 bytes from 22:00:00:0c:50:02:ce:f8 time = 319 usec
5 frames sent, 5 frames received, 0 timeouts
Round-trip min/avg/max = 277/672/1883 usec
Invokes fcping for the specified device
alias of the destination.
Step 2
switch# fcping fcid 0x010203 vsan 1
No response from the N port.
switch# fcping pwwn 21:00:00:20:37:6f:db:dd vsan 1
28 bytes from 21:00:00:20:37:6f:db:dd time = 1454 usec
...
5 frames sent, 5 frames received, 0 timeouts
Round-trip min/avg/max = 364/784/1454 usec
Returns a “No response from the N
port” message even when the N port is
active. This is due to resource
exhaustion at the N port.
Retry the command a few seconds
later.