Brocade Communications Systems 8 Troubleshooting And Diagnostics Manual page 46

3
Marginal links
switch:admin> porterrshow
0:
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
(output truncated)
3. If you suspect a marginal link, isolate the areas by moving the suspected marginal port cable to
4. Run the portLoopbackTest on the marginal port. You will need an adapter to run the loopback
5. Check the results of the loopback test and proceed as follows:
6. Replace the SFP on the marginal port.
7.
32
frames enc crc
tx rx in err g_eof shrt long eof
============================================================================
665k 7.0k 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
78 60 0 0
12 4 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
665k 7.4k 0 0
a different port on the switch. Reseating of SFPs may also cure marginal port problems.
If the problem stops or goes away, the switch port or the SFP is marginal (proceed to
If the problem does not stop or go away, see
test for the SFP. Otherwise, run the test on the marginal port using the loopback mode lb=5.
Use the different modes shown in
Reference for additional information on this command.
•
If the loopback test failed, the port is bad. Replace the port blade or switch.
•
If the loopback test did not fail, the SFP was bad.
Perform the following steps to rule out cabling issues:
a. Insert a new cable in the suspected marginal port.
b. Enter the portErrShow command to determine if a problem still exists.
•
If the portErrShow output displays a normal number of generated errors, the issue is
solved.
•
If the portErrShow output still displays a high number of generated errors, follow the
troubleshooting procedures for the Host or Storage device in the following section,
"Device login issues".
crc too too bad
out c3
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
step 7.
Table 5 to test the port. See the Fabric OS Command
Fabric OS Troubleshooting and Diagnostics Guide
enc disc link loss loss frjt fbsy
fail sync sig
6 0 0 1
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
7 0 0 3
3 0 0 1
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
6 0 0 1
2 0 0
2 0 0
1 0 0
1 0 0
1 0 0
1 0 0
1 0 0
1 0 0
6 0 0
2 0 0
1 0 0
1 0 0
1 0 0
1 0 0
1 0 0
1 0 0
2 0 0
step 6)
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