Troubleshooting Elp Issues Using The Cli - Cisco 9134 - MDS Multilayer Fabric Switch Troubleshooting Manual

Chapter 8 Troubleshooting Ports
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

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)
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.
Verify that the following parameters match on each switch in the VSAN using the show fctimer
Step 2
command:
•
•
•
Note
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.
Use the show port internal info interface fc command to verify that Rx buffer size matches on both
Step 4
ends of the ISL.
Note
switch# show port internal info interface fc2/1
fc2/1 - if_index:
Admin Config - state(up), mode(Auto), speed(auto), trunk(no trunk)
OL-9285-05
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
ED_TOV timer
RA_TOV timer
FS_TOV timer
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.
To issue commands with the internal keyword, you must have an account that is a member of
the network-admin group.
1080000
beacon(off), snmp trap(on), tem(false)
Common Problems with Port Interfaces
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
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