Brocade FICON Administrator’s Guide (Supporting Fabric OS v7.3.0) - Manual (Page 25)

the 7800 switches. The 7800 switches at either site may be replaced with the FX8-24 blades installed in
directors.
FIGURE 11 Cascaded configuration using FCIP and 7800 edge switches
Access control in FICON
Zoning is used to control access in a FICON environment. A zone consists of a group of ports or
WWNs. Connectivity is permitted only between connections to the switch that are in the same zone.
There are three types of zoning: WWN, port, and domain index zoning. A zone configuration includes at
least one zone. In open systems environments and in more complex FICON deployments, the zone
configuration contains multiple zones. Although domain index zoning is supported, WWN zoning for
Quality of Service (QoS) is recommended in environments where N_Port ID Virtualization (NPIV) is
deployed. For more information on how to implement QoS domain index zoning in your fabric, refer to
the "QoS zones" section of the Fabric OS Administrator's Guide for details.
When zoning changes occur, Registered State Change Notification (RSCN) messages are sent out
throughout the zone. RSCNs are part of the low-level Fibre Channel Protocol that alerts channels and
Access control in FICON
FICON Administrator's Guide 23
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