HP StorageWorks 4/256 HP StorageWorks Fabric OS 5.3.x administrator guide (569 - Page 300
To check for zoning problems, Restoring a segmented fabric
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To check for zoning problems 1. Enter the cfgActvShow command to determine if 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: • Enter the portCamShow command on the host port to verify that the target is present. • Enter the portCamShow command on the target. • Enter the nsZoneMember command on the host and target to determine whether or not 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. Refer to "Correcting zoning setup issues" on page 313 for additional information. Restoring a segmented fabric Fabric segmentation is generally caused by: • Incompatible fabric parameters (refer to "To reconcile fabric parameters individually" on page 312). • Incorrect PID setting (refer to "Configuring the PID format" on page 423). • Incompatible zoning configuration (refer to "To check for zoning problems" on page 312). • Domain ID conflict (refer to "To reconcile a domain ID conflict" on page 313). • A switch in a secure fabric is not running Secure Fabric OS. Refer to the Secure Fabric OS Administrator's 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 automatically 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 • Disable device probing • Suppress class F traffic • Per-frame route priority • Long distance fabric (not necessary on Bloom-based fabrics) • BB credit • PID format To reconcile fabric parameters individually 1. Log in to one of the segmented switches as admin (switch A). 2. Enter the configShow command. 3. Log in to another switch (switch B) in the same fabric as admin. 4. Enter 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. Also verify that the fabric parameter settings (see "Restoring a segmented fabric" on page 312) are the same for both switches. 6. Connect to the segmented switch after the discrepancy is identified. 7. Disable the switch by entering the switchDisable command. 312 Troubleshooting
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