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
8-27
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 8 Troubleshooting Ports
Common Problems with Port Interfaces
Troubleshooting ELP Issues Using the CLI
To troubleshoot ELP issues using the CLI, follow these steps:
Step 1
Use the show interface command to verify E port isolation
:
switch#
show interface fc2/4
fc2/4 is down
(Isolation due to ELP failure)
Hardware is Fibre Channel, WWN is 20:44:00:05:30:00:18:a2
vsan is 1
Beacon is turned off
1445517676 packets input, 727667035658 bytes, 0 discards
0 input errors, 0 CRC, 0 invalid transmission words
0 address id, 0 delimiter
Received 0 runts, 0 jabber, 0 too long, 0 too short
0 EOF abort, 0 fragmented, 0 unknown class
100 OLS, 67 LRR, 37 NOS, 0 loop inits
133283352 packets output, 1332969530 bytes
Transmitted 198 OLS, 50 LRR, 0 NOS, 10 loop inits
In this example the interface indicates a link isolation caused by an ELP failure on an E port. The ELP
is a frame sent between two switches to negotiate fabric parameters.
Step 2
Verify that the following parameters match on each switch in the VSAN using the
show fctimer
command:
•
ED_TOV timer
•
RA_TOV timer
•
FS_TOV timer
Note
Because fabric parameters are configured on a per VSAN basis, they are required to be the same
for all switches within a VSAN.
switch#
show fctimer
F_S_TOV : 5000 milliseconds
D_S_TOV : 5000 milliseconds
E_D_TOV : 2000 milliseconds
R_A_TOV : 10000 milliseconds
This sample output shows the default settings for these timeout values.
Step 3
Optionally, use the
fctimer
command in config mode to globally set these timeout values across all
VSANs or use the
fctimer
D_S_TOV
<timeout>
vsan
<vsan-id>
command for example, to set the
D_S_TOV timeout for a particular VSAN to override the global values.
Step 4
Use the
show port internal info interface fc
command to verify that Rx buffer size matches on both
ends of the ISL.
Note
To issue commands with the
internal
keyword, you must have an account that is a member of
the network-admin group.
switch#
show port internal info interface fc2/1
fc2/1 - if_index: 1080000
Admin Config - state(up), mode(Auto), speed(auto), trunk(no trunk)
beacon(off), snmp trap(on), tem(false)