S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
8-26
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 8 Troubleshooting Ports
Common Problems with Port Interfaces
The output in
Example 8-4
also displays evidence of corrupt data on the wire if there are a high number
of CRCs and errors. Discards may or may not indicate a problem. For example, a frame can be discarded
because of an ACL violation.
Example 8-4
show interface Command
mds# show interface fc4/2
fc4/2 is up
. . .
5 minutes input rate 0 bits/sec, 0 bytes/sec, 0 frames/sec
5 minutes output rate 0 bits/sec, 0 bytes/sec, 0 frames/sec
322944 frames input, 19378384 bytes
0 discards, 0 errors <........................................ Errors
0 CRC, 0 unknown class
0 too long, 0 too short
20439797 frames output, 41780390808 bytes
0 discards, 0 errors
0 input OLS, 0 LRR, 0 NOS, 0 loop inits
2 output OLS, 2 LRR, 0 NOS, 0 loop inits <.................Link Initialization
12 receive B2B credit remaining
1 transmit B2B credit remaining
Port Bounces Between Initializing and Offline States
Symptom
Port bounces between the initializing and offline states.
An ELP failure may result in a port bouncing between the initializing and offline states.
Table 8-7
lists
possible causes and solutions to this problem.
Table 8-7
Port Bounces Between the Initializing and Offline States
Symptom
Possible Cause
Solution
Port bounces
between the
initializing and
offline states.
An ELP packet was dropped in
one of the two switches.
Use the
show hardware internal fc-mac port
port
statistics
CLI
command and the
show hardware internal error
command. Analyze
the output of the two commands for possible packet drops. See the
“Troubleshooting ELP Issues Using the CLI” section on page 8-27
.
See also the
“E Port Is Isolated in a VSAN” section on page 11-5
.
Note
You must use the
attach module
CLI command to access the
FC-MAC show commands
There is a software bug or
incompatibility in handling the
ELP process.
Analyze the event history provided by the Port Manager after using
the
show port internal event-history
CLI command. See the
“Troubleshooting ELP Issues Using the CLI” section on page 8-27
.
