Chapter 1. IBM Flex System FC3171 8 Gb SAN Switch - QLogic

Domain ID and domain ID lock
The domain ID is a unique Fibre Channel identifier for the switch. The Fibre
Channel address consists of the domain ID, port ID, and the Arbitrated Loop
Physical Address (ALPA). The maximum number of switches within a fabric is 239
with each switch having a unique domain ID.
The IBM Flex System FC3171 8 Gb SAN Switch comes from the factory with the
domain ID unlocked. This state means that if there is a domain ID conflict in the
fabric, the switch with the highest principal priority, or the principal switch, will
reassign any domain ID conflicts and establish the fabric. If you lock the domain ID
on a switch and a domain ID conflict occurs, one of the switches will isolate as a
separate fabric and the Logged-In LEDs on both switches will flash to show the
affected ports. Refer to the IBM Flex System FC3171 8 Gb SAN Switch Command Line
Interface User’s Guide for information about the Set Config Switch command and the
DomainIDLock and PrincipalPriority parameters.
If you connect a new switch to an existing fabric with its domain ID unlocked, and a
domain conflict occurs, the new switch will isolate as a separate fabric. However,
you can remedy this by resetting the new switch or taking it offline then back
online. The principal switch will reassign the domain ID and the switch will join the
fabric.
Notes:
Domain ID reassignment is not reflected in zoning that is defined by domain ID and
port number pair. You must reconfigure zones that are affected by domain ID
reassignment.
Syslog
The Syslog (Remote Logging) feature enables saving log information to a remote
host that supports the syslog protocol. When enabled, the log entries are sent to the
syslog host at the IP address that you specify in the Logging Host IP Address field.
Log entries are saved in the internal switch log whether this feature is enabled or
disabled.
To save log information to a remote host, you must edit the syslog.conf file (located
on the remote host) and then restart the syslog daemon. Consult your operating
system documentation for information on how to configure Remote Logging. The
syslog.conf file on the remote host must contain an entry that specifies the name of
the log file in which to save error messages. Add the following line to the
syslog.conf file. A separates the selector field (local0.info) and action field
that contains the log file path name (/var/adm/messages/messages.name).
local0.info /var/adm/messages.name
Symbolic name
The symbolic name is a user-defined name of up to 32 characters that identifies the
switch. The symbolic name is used in the displays and data windows to help
identify switches. The illegal characters are the pound sign (#), semi-colon (;), and
comma (,).
56 IBM Flex System FC3171 8 Gb SAN Switch QuickTools User’s Guide