Brocade Network Advisor SAN + IP User Manual v12.1.0 - Manual (Page 1248)

Brocade Network Advisor SAN + IP User Manual 1197
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Cascaded FICON fabric merge
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• 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.
• Configures High Integrity Fabric Configuration (HIFC) on the seed switch of the primary and
secondary fabric.
- SCC policy will be created or modified to limit connectivity to switches from both fabrics.
- Configures Fabric-Wide Consistency Policy (FWCP) on both fabrics.
- FWCP is configured in tolerant mode for SCC for an Fibre Channel Routing (FCR) fabric.
• Enables Port-Based Routing (PBR) on all switches in the secondary fabric if all the switches in
the primary fabric are found to be enabled for PBR. Note that a mixed policy of
Exchanged-Based Routing (EBR), Device-Based Routing (DBR) and PBR cannot be enabled on
a fabric.
• Enables Exchange-Based Routing (EBR) on all switches in the secondary fabric if all switches in
the primary fabric are enabled for EBR. Note that EBR requires that switches operate at 8 Gbps
or greater with Fabric OS 6.4 or later. If all the EBR-enabled switches in the primary fabric are
found to meet these requirements and a switch in the secondary fabric does not meet these
requirements, an error message displays. Note that a mixed policy of EBR and PBR cannot be
enabled on a fabric.
• Enables Device-Based Routing (DBR) on all switches in the secondary fabric if all switches in
the primary fabric are enabled for DBR. Note that DBR requires that switches operate at 8
Gbps or greater with Fabric OS 7.1 or later. If all the DBR-enabled switches in the primary fabric
are found to meet these requirements and a switch in the secondary fabric does not meet
these requirements, an error message displays. Note that a mixed policy of PBR, EBR, and DBR
cannot be enabled on a fabric.
• (Optional) Turns on FICON Management Server (FMS) mode on all switches. If some switches
already have FMS mode enabled, it is re-enabled.