Cascaded Ficon Fabric Merge - Brocade Communications Systems StoreFabric SN6500B User Manual

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. 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:
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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.
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SCC Policy will be created or modified to limit connectivity to switches from both fabrics.
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Configures Fabric Wide Consistency Policy (FWCP) on both fabrics.
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FWCP is configured in tolerant mode for SCC for an 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.
Primary fabric switches will not be enabled for DLS, In-Order Delivery (IOD), insistent domain ID
flag (IDID), and APT.
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In-Order Delivery (IOD) will be enabled on all switches in the secondary fabric.
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Dynamic Load Sharing (DLS) will be enabled on switches in the secondary fabric that are
operating at 8 Gbps or greater and are running Fabric OS 6.3 or later.
NOTE
To enable DLS, all switches in the fabric must be 8 Gbps or faster and running
Fabric OS 6.3 or later.
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Primary fabric switches will not be disturbed for disruptive operations, such as IDID and
APT. Instead, all primary fabric switches will be validated for current routing policies and
the same policies will be enabled on all the secondary fabric switches.

Cascaded FICON fabric merge

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