The Fibre Channel DID number is the physical Fibre Channel address
that the N_Port uses.
3.2 Using the emxmgr Utility to Modify Worldwide
Name-to-Target ID Mapping
You can use the
emxmgr
utility to modify worldwide name-to-target ID
mapping in either of two ways:
•
Use the utility interactively
•
Use the utility with the
-c
file
option
______________________
Note
_______________________
Use the
emxmgr
utility with the
-s
option to obtain input file
syntax information.
You can also obtain input file syntax information with the
interactive form of the utility by selecting the choice to change
target ID mappings, then selecting the help function.
If you are using the
emxmgr
utility to synchronize worldwide name-to-target
ID mapping in a fabric topology and rebuild the kernel, ensure that the
/sys/data/emx_data.c
file is an empty file. If it is not correct (or empty),
the new kernel will have incorrect mapping data. The
/etc/emx.db
,
/etc/emx.db.bak
, and
/etc/emx.info
files will be updated according
to the contents of the
/sys/data/emx_data.c
file and contain mapping
information that is not correct for your configuration. Your configuration will
not operate correctly.
3.2.1 Using the emxmgr Utility Interactively
Use the
emxmgr
utility without any command-line options if you want to
enter the interactive mode to:
•
Display the presence of KGPSA Fibre Channel adapters
•
Display the target ID mappings for a Fibre Channel adapter
•
Display the current Fibre Channel topology for a Fibre Channel adapter
•
Modify the worldwide name-to-target ID mapping
You have already seen how you can perform the first three of the previous
functions from the command line. The same output is available using the
interactive mode by selecting the appropriate option (shown in the following
example).
Using the emx Manager (emxmgr) Utility 3–5
