Brocade Communications Systems IP250 user manual Cascaded Ficon fabric merge, Enabling DLS

21 Cascaded FICON fabric merge

NOTE

Either exchange based routing, port based routing, or device-based routing is enabled on all switches of the selected fabric. You cannot enable a mixed routing policy.

6.Click OK if you want to proceed.

A warning message displays listing the switches of the selected fabric that are to be disabled and re-enabled in order to enable the desired routing policy and IDID.

7.Click Yes to continue.

If configuration is successful, a confirmation message displays.

If FMS Mode was selected, each switch is checked for a CUP license. Any switches that do not have a CUP license are listed, with a reminder that a CUP license is necessary to communicate with the S/B FICON Management Server.

NOTE

FMS mode cannot be enabled on switches running Fabric OS 7.0 and later unless the switches have an active CUP license.

Enabling DLS

Consider the following when enabling Dynamic Load Sharing (DLS) in step 4:

•DLS requires DLS support on the switch. Lossless DLS requires Lossless DLS support on the switch.

•Enabling DLS will enable IOD without Lossless DLS on all other switches, enable DLS on switches that support DLS, and disable DLS on all other switches.

•DLS is only supported on the 40-port, 8 Gbps FC Switch, 80-port, 8 Gbps FC Switch, 512-port Backbone Chassis, and 4-slot Backbone Chassis.

•Enabling DLS may result in dropped frames when paths fail over. It is recommended that you set the preferred IOD delay time to minimize frame drops.

•To enable DLS, all switches in the fabric must be 8 Gbps or faster and running Fabric OS 6.4 or later.

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 this involves disabling and enabling the switches in both fabrics. The merge process will not make any configuration changes on the primary (production) fabric that are disruptive.

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 fabrics merge wizard performs the following operations:

•Checks the primary and secondary fabrics for any merge issues.

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