D_Port Support; Limitations And Considerations - HP StoreFabric SN6500B Administrator's Manual

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D_Port support

D_Port support
You can convert a Fibre Channel port into a D_Port on an AG switch and connected fabric switch or
another AG switch (cascaded configuration) to test the link between the ports. When you configure
the ports on each end of the link as D_Ports, diagnostic tests automatically initiate on the link
when the D_Ports go online. Once in D_Port mode, the port does not participate in fabric
operations, login to a remote device, or run data traffic.
supported D_Port configurations.
Results from D_Port testing can be viewed using Fabric OS commands during or after testing.
Either the fabric or AG switch will be the initiator and the other will be the responder. You can view
detailed results from the initiator (AG or fabric switch).
The Diagnostic (D_Port) feature is supported on 16 Gbps ports only in the following configurations:
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The following tests automatically run on the link between configured D_Ports:
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NOTE
For details on configuring D_Ports, using D_Ports, and D_Port limitations and considerations, refer
to the Fabric OS Troubleshooting and Diagnostics Guide. For details on D_Port-related commands
refer to the Fabric OS Command Reference.

Limitations and considerations

Following are specific limitations and considerations for using D_Ports in AG switch configurations.
For a complete list of D_Port limitations and considerations, refer to the Fabric OS Troubleshooting
and Diagnostics Guide.
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AG switch connected AG switch in cascaded configuration.
Brocade fabric switch and AG switch.
Electrical loopback
Optical loopback
Link traffic
Link latency and distance measurement
D_Port configuration is not supported between an HBA and AG switch port.
D-Port must be configured on both the AG and fabric switch or the AG switch and cascaded AG
switch before enabling D-ports on both sides of the link. Otherwise the port will be persistently
disabled.
After configuring D_Port for an AG switch port, mapping between the F-Port and N-Port will be
not be retained. This includes F_Port to N_Port, static, preferred, and device (WWN) mapping.
Therefore all mapping has to be manually removed on the N-Port and F-Port before configuring
the port as a D_Port.
Figure 4 on page 10 illustrates the
Access Gateway Administrator's Guide
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