Quantum FC1202, User Manual

Page: 74 / 108

Chapter 2 FC1202 Bridge Serial/Telnet User Interface
Perform Configuration
56 Quantum FC1202 User’s Guide
•
Auto Sense, Hard AL_PA
: In this mode, the Fibre Channel port
uses a Hard AL_PA value, a unique one-byte valid value
(derived from an Arbitrated Loop Topology as defined in ANSI
specification FC_AL version 4.5). The FC1202 presents a list of
these loop addresses along with the corresponding AL_PA. The
user can then select the desired loop address.
•
Change AL_PA Value
changes the AL_PA value. The AL_PA lookup
table is displayed. Enter a node number from the table.
•
Toggle Discovery Mode
(default: Manual Discovery Only) determines
how the FC1202 will discover new Fibre Channel devices.
Options include:
•
Auto Discovery on Reboot Events
allows the FC1202 to
automatically discover all Fibre Channel devices during reboots,
including both the ports and the devices.
•
Auto Discovery on Link-up Events
allows the FC1202 to
automatically discover all Fibre Channel devices during reboots,
including both the ports and the devices for the first link-up
event. Subsequent link-up events will only discover the ports and
not attached devices.
Caution:
If these configuration settings are incorrectly set,
processing difficulties may occur. Before changing these
settings, evaluate the need for the change and verify the
desired setting. Backing up the FC1202 configuration to an
external file before making changes to these settings is
recommended.
•
Manual Discovery Only
(default) sets discovery of new devices to
occur only after the user selects the Refresh Device Display
option. The Refresh Device Display option is accessed from the
System Utilities Menu.
Note:
SCSI devices attached to a Fibre Channel port must be mapped
as sequential Fibre Channel LUNs starting at LUN number 00.
Skipping LUN numbers is not recommended when mapping
Fibre Channel LUNs because Fibre Channel Discovery stops
the discovery process whenever an empty LUN position is
found.