3–Managing Switches
Configuring a Switch
3-18
59264-02 B
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.
Switches come from the factory with the domain IDs unlocked. This 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 LED
s on
both switches will flash to show the affected ports. Refer to the
QLogic 5800V
Series Stackable Fibre Channel Switch Command Line Interface Guide
for
information about the Switch keyword and the Domain ID Lock and Principal
Priority 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.
Syslog
The Syslog (Remote Logging) feature enables saving of the 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 text box. Log entries are saved in the internal switch log whether this
feature is enabled or not.
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 <tab> separates the selector field
(local0.info) and action field which contains the log file path name
(/var/adm/messages/messages.name).
local0.info <tab> /var/adm/messages.name
NOTE:
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.
