DCFM Enterprise User Manual (53-1001775-01, June 2010)

DCFM Enterprise User Manual 479
53-1001775-01
Cascaded FICON fabric merge
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Cascaded FICON fabric merge
The Management application provides a wizard to help you merge two fabrics for cascaded FICON.
Note that merging two cascaded FICON fabrics may be disruptive to current I/O operations in both
fabrics, as it needs to disable and enable the switches in both fabrics.
NOTE
It is recommended that you run a configuration backup on all switches before performing the fabric
merge. This helps you to revert back the switch configurations later.
The cascaded FICON merge wizard performs the following operations on the selected fabrics:
• Checks the fabrics for any merge issues.
• Turns on the insistent domain ID (IDID) flag on all of the switches in both fabrics.
• Clears Admin Domain, Access Control Lists (ACLs), and zone databases, if they exist, from one
of the fabrics (you select which fabric from within the wizard).
NOTE
Clearing the ACL database in a large fabric might take a long time; for example, in a 50-switch
fabric, this operation might take from 30 minutes to 1 hour.
• Configures High Integrity Fabric Configuration (HIFC) on the seed switch of the primary fabric.
- Fabric-wide consistency policy is configured to include SCC in strict mode.
- SCC policy is created or modified to limit connectivity to only the switches in both fabrics.
• Enables port-based or exchange-based routing on switches.
- If you select Port-Based Routing, enables port-based routing on 4 Gbit/sec platform
switches.
- If you select Exchange-Based Routing, enables exchange-based routing on 8 Gbit/sec
platform switches running Fabric OS 6.4 or later. Enables port-based routing on all other
switches in the fabric.
• Enables or disables Dynamic Load Sharing (DLS) on all switches.
- If you select Enable DLS, performs the following actions:
 Enables In-Order Delivery (IOD) with lossless DLS on switches that support lossless
DLS and enables IOD without lossless DLS on all other switches.
 Enables DLS on switches that support lossless DLS and disables DLS on all other
switches.
- If you do not select Enable DLS, performs the following actions:
 Enables IOD on all switches.
 Disables DLS on all switches.
• (Optional) Turns on FICON Management Server (FMS) mode on all switches. If some switches
already have FMS mode enabled, it is re-enabled.
If you select FMS mode to be enabled on all switches and if some of the switches do not have
a CUP license, then after successful configuration, you can access the Port Connectivity
(PDCM) matrix, but the host system cannot communicate with the FICON Management Server
unless you install a CUP license. If a CUP license is later installed on these switches, then FMS
mode must be re-enabled on these switches.
• (Optional) Configures long distance settings on selected ports (requires Extended Fabric
license).