Hi Chetan,
See the link below for detailed instructions, but you need to:
(1)remove broadcast zoning if configured
(2)reload the switch.
http://www.cisco.com/en/US/docs/switches/datacenter/mds9000/hw/9500series/installation/5.2/installmigratefab3.html#wp1437974
Migrating to Cisco MDS 8-Gbps Advanced Fibre Channel Module
To migrate to the Cisco MDS 9000 48-port 8-Gbps Advanced Fibre Channel module (DS-X9248-256K9) or to the Cisco MDS 9000 32-port 8-Gbps Advanced Fibre Channel module (DS-X9232-256K9), follow these steps:
Step 1 - Upgrade to Cisco MDS NX-OS Release 5.2 or a later release. Follow the correct upgrade path for your switch:
–From all 5.0(x) releases, you can upgrade directly to Cisco MDS NX-OS Release 5.2.
–From all 4.2(x) and 4.1(x) releases, upgrade to any 5.0(x), release and then upgrade to NX-OS Release 5.2 or a later release.
–From all SAN-OS 3.3(x) releases, upgrade to the latest NX-OS 4.x release, upgrade to any 5.0(x) release, and then upgrade to NX-OS Release 5.2 or a later release.
–From all SAN-OS 3.2(x), 3.1(x), and 3.0(x) releases, upgrade to any 3.3(x) release, upgrade to the latest NX-OS Release 4.x, and then upgrade to any 5.0(x) release, and then upgrade to NX-OS Release 5.2 or a later release.
–For additional upgrade paths from earlier releases, see the Cisco MDS 9000 Release Notes for MDS NX-OS Release 5.2(1).
Step 2 - Install the Fabric 3 module in the Cisco MDS 9513 Director to use the full bandwidth capability of the 8-Gbps Advanced Fibre Channel modules. To install a Fabric 3 module, refer to the "Upgrading to Fabric 3 Module" section.
Note The 256-Gbps bandwidth capability of the 8-Gbps Advanced Fibre Channel modules require the Fabric 3 module in the Cisco MDS 9513 Director.
Step 3- Perform a switch reload. In certain migration scenarios a switch reload is required for the Cisco MDS 9513 Director to change to the fabric mode that supports the Generation 4 module.
Step 4 - Install the Cisco MDS 9000 48-port 8-Gbps Advanced Fibre Channel module (DS-X9248-256K9) or the Cisco MDS 9000 32-port 8-Gbps Advanced Fibre Channel module (DS-X9232-256K9).
