HP StorageWorks Fabric OS 5.X Administrator Guide (AA-RVHWB-TE, September 2005)

148 Troubleshooting
Checking for zoning problems
1. Issue the cfgActvShow command to determine whether zoning is enabled.
If zoning is enabled, it is possible that the problem is being caused by zoning enforcement (for
example, two devices in different zones cannot see each other).
2. Confirm that the specific edge devices that need to communicate with each other are in the same
zone.
• If they are in the same zone, perform the following tasks:
a. Issue the portCamShow command on the host port to verify that the target is present.
b. Issue the portCamShow command on the target.
c. Issue the nsZoneMember command on the host and target to determine whether the Name Server
is aware that these devices are zoned together.
• If they are not in the same zone and zoning is enabled, proceed to step 3.
3. Resolve zoning conflicts by putting the devices into the same zoning configuration.
See ”Correcting zoning setup issues” on page 149 for additional information.
Restoring a segmented fabric
Fabric segmentation is generally caused by:
• Incompatible fabric parameters (see ”Reconciling fabric parameters individually” on page 148).
• Incorrect PID setting (see ”Configuring the PID format” on page 213).
• Incompatible zoning configuration (see ”Checking for zoning problems” on page 148).
• Domain ID conflict (see ”Reconciling a domain ID conflict” on page 149).
• A switch in a secure fabric not running Secure Fabric OS. (See the HP StorageWorks Secure Fabric
OS administrator guide for additional information.)
There are a number of settings that control the overall behavior and operation of the fabric. Some of these
values, such as the domain ID, are assigned by the fabric and can differ from one switch to another in the
fabric. Other parameters, such as the BB credit, can be changed for specific applications or operating
environments, but must be the same among all switches to allow the formation of a fabric.
The following fabric parameters must be identical for a fabric to merge:
• R_A_TOV
• E_D_TOV
• Data field size
• Sequence level switching
• Disabled device probing
• Suppressed class F traffic
• Per-frame route priority
• Long-distance fabric (not necessary on Bloom-based fabrics)
• BB credit
• PID format
Reconciling fabric parameters individually
1. Log in to one of the segmented switches as admin (switch A).
2. Issue the configShow command.
3. Log in to another switch (switch B) in the same fabric as admin.
4. Issue the configShow command.
5. Compare the two switch configurations line by line and look for differences. Do this by comparing the
two telnet windows or by printing the configShow output. Verify that the fabric parameter settings
(see ”Restoring a segmented fabric”) are the same for both switches.
6. Connect to the segmented switch after the discrepancy is identified.
7. Disable the switch by issuing the switchDisable command.