Cisco N5K-M1600 - Expansion Module - 6 Ports Troubleshooting Manual page 80

Zoning
S e n d d o c u m e n t c o m m e n t s t o n e x u s 5 k - d o c f e e d b a c k @ c i s c o . c o m .
Step 2 Determine which user has the lock on that switch.
Clear the lock for that user on that switch.
Step 3
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Host cannot communicate with storage
In initial SAN deployments or after topology changes in the SAN, some hosts might not be able to
communicate with storage. The initiator cannot access the LUNs that were allocated for them in the
storage array.
Possible Cause
If the host and storage are connected to two different switches, the ISL link, (the xE port connecting both
switches) might be isolated.
The xE port might be isolated in a specific VSAN for possible reasons:
Cisco Nexus 5000 Series Troubleshooting Guide
5-8
On the same switch, enter the show zone status vsan <vsan-id> command to determine which user
holds the lock.
Example:
switch1# show zone status vsan 200
VSAN: 200 default-zone: deny distribute: active only Interop: default
mode: enhanced merge-control: allow
session: remote [dom: 121][ip: 171.165.98.20] <<==
In this example the remote switch with the IP address of 171.165.98.20 has the lock.
Connect to the remote switch and enter the show zone status vsan command.
Example:
switch2# show zone status vsan 200
VSAN: 200 default-zone: deny distribute: active only Interop: default
mode: enhanced merge-control: allow
session: cli [remi] <<==
In the example, user Remi is holding the enhanced zoning lock.
On the remote switch (N5K2 in the example), release the lock with the no zone commit vsan
<vsan-id> command.
To confirm that the lock had been cleared, enter the show zone status vsan <vsan-id> command.
At this point, the session parameter should appear as none.
If the lock still persists, remove the lock from the switch that holds the lock with the clear zone lock
command.
If the lock continues to persist, use the following commands to collect information to aid further
analysis:
show zone internal vsan <vsan-id>
show zone status vsan <vsan-id>
show fcdomain domain-list vsan <vsan-id>
show users
show tech-support zone
show tech-support device-alias
show logging
Chapter 5 Troubleshooting SAN Switching Issues
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