Technical data

10-8 Fabric OS Administrator’s Guide
Publication Number: 53-0000518-09
Restoring a Segmented Fabric
10
4. Enter the fcpProbeShow command to display the FCP probing information for the devices
attached to the specified F_Port or FL_Port. This information includes the number of successful
logins and SCSI INQUIRY commands sent over this port and a list of the attached devices.
5. Check the port log to determine whether or not the device sent the FLOGI frame to the switch, and
the switch probed the device.
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 10-10 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 10-9).
• Incorrect PID setting (refer to “Configuring the PID Format” on page A-1).
• Incompatible zoning configuration (refer to “To check for zoning problems” on page 10-8).
• Domain ID conflict (refer to “To reconcile a domain ID conflict” on page 10-9).
• 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