Troubleshooting - Brocade Communications Systems A7533A - Brocade 4Gb SAN Switch Base Administrator's Manual

Troubleshooting

If you are having problems with iSCSI connectivity, use the following table to troubleshoot before
calling your support provider.
TABLE 4
Troubleshooting iSCSI connectivity
Problem
iSCSI host reports connection
failed.
No DDSet or zoning
configuration enabled and
iSCSI host cannot discover any
targets.
iSCSI host can discover
targets, but cannot log in to
them.
iSCSI host can log in to
targets, but cannot mount any
disks.
Easy create cannot find any
LUNs on the target.
iSCSI Gateway Service Administrator's Guide
53-1000603-01
Cause
Network connectivity is having
problems.
Default zoning is set to no
access.
Virtual targets have not been
created, virtual targets are not
online, or changes have not
been committed.
No LUNs have been assigned to
the virtual targets.
There is an inconsistency in the
iSCSI database.
Zoning is enabled, but iSCSI
virtual initiators are not in the
same zone as the targets.
The target is a RAID device, but
iSCSI virtual initiators have not
been added to the LUN
mapping.
The target is a RAID device, but
the fcLunQuery WWN has not
been added to the LUN
mapping.
Solution
Verify IP address using: portShow ipif <slot>/ge<port>
Verify IP route using: portShow iproute <slot>/ge<port>
Ping the PC using:
portCmd - -ping <slot>/ge<port> -s <source IP> \
-d <destination IP>
Make corrections to the IP information using the portCfg command.
Check default zoning using:
defZone --show
Either create a zoning configuration or set default zoning to All Access
using the defZone command.
Check virtual targets using:
iscsiCfg - -show tgt
Make sure all virtual targets are reported as online and committed.
If the virtual target is offline, either no LUNs have been mapped to that
virtual target or the physical LUN is offline. If the virtual target is not
committed, then use the iscsicfg - -commit all command.
Check LUN mapping using:
iscsiCfg - -show lun
Make sure LUNs have been assigned to the virtual targets. Assign LUNs
using the iscsiCfg command.
Check using:
iscsiCfg - -show fabric
Make sure the aggregated state is in sync.
If it is not in sync, fix the inconsistency and perform a commit using the
iscsiCfg - -commit all command.
Check zoning using cfgShow.
Make sure iSCSI virtual initiators are in the same zone as the targets.
Display the port WWN of the iSCSI virtual initiators using nsShow.
Add all iSCSI virtual initiators to the target and allow all iSCSI virtual
initiators to access all of the target LUNs. To display the WWNs of the
iSCSI virtual initiators, use nsShow.
Add the fcLunQuery WWN to the target's LUN mapping. Display the
WWNs using:
fcLunQuery -s.
Or the target is not compatible with fcLunQuery. Create a virtual target
and add LUNs manually using the iscsiCfg command
Appendix
B
51