HP Cisco MDS 9216 - Fabric Switch Configuration Manual page 498

FC IDs
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
To enable contiguous domains in a specific VSAN (or a range of VSANs) using Fabric Manager, follow
these steps:
Expand Fabricxx > VSANxx and then select Domain Manager in the Logical Domains pane for the
Step 1
fabric and VSAN that you want to enable contiguous domains for.
You see the running configuration of the domain in the Information pane.
Select the Configuration tab and check the Contiguous Allocation check box for each switch in the
Step 2
fabric that will have contiguous allocation.
Click the Apply Changes icon to save these changes.
Step 3
FC IDs
When an N or NL port logs into a Cisco MDS 9000 Family switch, it is assigned an FC ID. By default,
the persistent FC ID feature is enabled. If this feature is disabled, the following consequences apply:
•
•
•
•
This section describes configuring FC IDs and includes the following topics:
•
•
•
•
•
•
•
•
Cisco MDS 9000 Family CLI Configuration Guide
25-16
An N or NL port logs into a Cisco MDS 9000 Family switch. The WWN of the requesting N or NL
port and the assigned FC ID are retained and stored in a volatile cache. The contents of this volatile
cache are not saved across reboots.
The switch is designed to preserve the binding FC ID to the WWN on a best-effort basis. For
example, if one N port disconnects from the switch and its FC ID is requested by another device,
this request is granted and the WWN with the initial FC ID association is released.
The volatile cache stores up to 4000 entries of WWN to FC ID binding. If this cache is full, a new
(more recent) entry overwrites the oldest entry in the cache. In this case, the corresponding WWN
to FC ID association for the oldest entry is lost.
The switch connection behavior differs between N ports and NL ports:
– N ports receive the same FC IDs if disconnected and reconnected to any port within the same
switch (as long as it belongs to the same VSAN).
– NL ports receive the same FC IDs only if connected back to the same port on the switch to which
they were originally connected.
About Persistent FC IDs, page 25-17
Enabling the Persistent FC ID Feature, page 25-17
About Persistent FC ID Configuration, page 25-17
Configuring Persistent FC IDs, page 25-18
About Unique Area FC IDs for HBAs, page 25-19
Configuring Unique Area FC IDs for an HBA, page 25-19
About Persistent FC ID Selective Purging, page 25-21
Purging Persistent FC IDs, page 25-21
Chapter 25 Configuring Domain Parameters
OL-16184-01, Cisco MDS SAN-OS Release 3.x