Virtual TapeServer SCSI-to-FC Adapter User Manual

6-17
Chapter 6: Using Visual Manager
Main Menu → Ports → FC Port 0
This menu allows viewing or changing current settings for the Fibre Channel port.
Figure 6-15. FC Port 0 screen
To make any changes, modify the entries as described below and then select the Submit button.
• Link Status indicates whether the port link status is currently up, down, or pending.
• Port Mode can be set to either Auto Sense (default setting) or N_Port Mode.
In Auto Sense mode, the VT5900-SA FC port tries to come up as a loop and if not successful
then tries to come up as a fabric. If the port comes up as a loop, it then determines whether it’s
on a private or public loop.
In N_Port mode, the VT5900-SA’s FC port skips trying to come up as a loop and instead tries
coming up as a fabric only. If the VT5900-SA is on a loop and N_Port mode is selected, an
error in communication may occur.
• Use Hard ALPA sets the Hard AL_PA usage, which can be Enabled or Disabled. If set to
Enabled, a unique one-byte valid value (derived from an Arbitrated Loop Topology as
defined in ANSI specification FC_AL ver 4.5) is used for the Fibre Channel configuration.
When configuring the FC AL_PA, the VT5900-SA presents a list of loop addresses along with
the corresponding AL_PA. From here, the user can select the loop address desired.
• When Hard AL_PA usage is set to Enabled, you can set the Hard AL_PA value by selecting
the SET ALPA button and entering a node number from the AL_PA lookup table that
appears. For more information, see
“Table C-5. Arbitrated Loop Node number to AL_PA