Using Fc-Redirect With Cfs Regions; Guidelines For Designing Cfs Regions For Fc-Redirect - Cisco MDS 9000 series Configuration Manual

Using FC-Redirect with 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
is enabled, all further FC-Redirect Configuration changes will Fail
across the fabric. This could lead to traffic disruption for
applications like SME.
3) If enabled, Version2 mode CANNOT be disabled till all FC-Redirect
configurations are deleted. FC-Redirect configurations can be
deleted ONLY after all the relevant application configurations
are deleted. Please use the command 'show fc-redirect configs'
to see the list of applications that created FC-Redirect
configurations.
4) 'write erase' will NOT disable this command. After 'write erase'
on ANY switch in the fabric, the user needs to do:
'clear fc-redirect decommission-switch'
on that that switch. Without that, if the user moves the switch
to a different fabric it will try to convert all the switches
in the fabric to Version2 mode automatically. This might lead
to Error conditions and hence Traffic disruption.
Do you want to continue? (Yes/No) [No]Yes
Enter yes.
Step 3
Before proceeding further, please check the following:
1) All the switches in the fabric are seen in the output of
'show fc-redirect peer-switches' command and are in 'UP' state.
2) All switches in the fabric are running SanOS version 3.3.x or
higher.
3) Please make sure the Fabric is stable ie.,
No fabric changes/upgrades in progress
Do you want to continue? (Yes/No) [No] Yes

Using FC-Redirect with CFS Regions

The FC-Redirect feature uses Cisco Fabric Services (CFS) regions to distribute the FC-Redirect
configuration. By default, the configuration is propagated to all FC-Redirect-capable switches in the
fabric. CFS regions can be used to restrict the distribution of the FC-Redirect configuration.
Note Using FC Redirect with CFS regions is an optional configuration only if the number of switches in the
SAN exceeds the scalability limit supported by IOA. As of MDS NX-OS Release 4.2(1), the number of
switches supported in a fabric is 34.
To learn more about CFS regions, refer to the Cisco MDS 9000 Family NX-OS System Management
Configuration Guide.

Guidelines for Designing CFS Regions For FC-Redirect

To design CFS regions for FC-Redirect, follow these guidelines:
•
•
Cisco MDS 9000 Family I/O Accelerator Configuration Guide
2-4
Ensure that the CFS region configuration for FC-Redirect can be applied to all FC-Redirect-based
applications. The applications include Cisco SME, Cisco DMM, Cisco IOA, and any future
applications.
Ensure that all FC-Redirect-capable switches, that are connected to the hosts, targets, and the
application switches (switches with MSM-18/4 modules in a cluster), are configured in the same
region.
Chapter 2 Getting Started
OL-20708-01, Cisco MDS NX-OS Release 5.0(1a)