Cfs Regions; About Cfs Regions - HP Cisco MDS 9216 - Fabric Switch Configuration Manual

CFS Regions

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
CFS Regions
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About CFS Regions

A CFS region is a user-defined subset of switches for a given feature or application in its physical
distribution scope.When a SAN is spanned across a vast geography, you may need to localize or restrict
the distribution of certain profiles among a set of switches based on their physical proximity. Before
release 3.2.(1) the distribution scope of an application within a SAN was spanned across the entire
physical fabric without the ability to confine or limit the distribution to a required set of switches in the
fabric. CFS regions enables you to overcome this limitation by allowing you to create CFS regions, that
is, multiple islands of distribution within the fabric, for a given CFS feature or application. CFS regions
are designed to restrict the distribution of a feature's configuration to a specific set or grouping of
switches in a fabric.
Note
Example Scenario: The callhome is an application that triggers alerts to Network Administrators when
a situation arises or something abnormal occurs. When the fabric covers many geographies and with
multiple Network Administrators who are each responsible for a subset of switches in the fabric, the
callhome application sends alerts to all Network Administrators regardless of their location. For the
callhome application to send message alerts selectively to Network Administrators, the physical scope
of the application has to be fine tuned or narrowed down, which is achieved by implementing CFS
regions.
CFS regions are identified by numbers ranging from 0 through 200. Region 0 is reserved as the default
region, and contains every switch in the fabric. You can configure regions from 1 through 200. The
default region maintains backward compatibility. If there are switches on the same fabric running
releases of SAN-OS before release 3.2(1), only features in Region 0 are supported when those switches
are synchronized. Features from other regions are ignored when those switches are synchronized.
If the feature is moved, that is, assigned to a new region, its scope is restricted to that region; it ignores
all other regions for distribution or merging purposes. The assignment of the region to a feature has
precedence in distribution over its initial physical scope.
You can configure a CFS region to distribute configurations for multiple features. However, on a given
switch, you can configure only one CFS region at a time to distribute the configuration for a given
feature. Once you assign a feature to a CFS region, its configuration cannot be distributed within another
CFS region.
Cisco MDS 9000 Family CLI Configuration Guide
13-12
About CFS Regions, page 13-12
Managing CFS Regions Using Fabric Manager, page 13-13
Creating CFS Regions, page 13-13
Assigning Features to CFS Regions, page 13-13
Moving a Feature to a Different Region, page 13-14
Removing a Feature from a Region, page 13-15
Deleting CFS Regions, page 13-15
You can only configure a CFS region on physical switches in a SAN. You cannot configure a
CFS region in a VSAN.
Chapter 13 Using the CFS Infrastructure
OL-16184-01, Cisco MDS SAN-OS Release 3.x