Brocade FICON Administrator’s Guide (Supporting Fabric OS v7.3.0) User Manual
Page 88
connections that make emulation isolation difficult. By using Enhanced TI Zoning to support device
membership in multiple zones, these types of emulation configurations are addressed.
FIGURE 25 Emulation topology using Enhanced TI Zones
The preceding figure shows the following Enhanced TI Zoning definitions for the emulation topology:
•
Green TI Zone includes channel 0, ISL 80, ISL 81, Grid 1, and Grid 4.
•
Blue TI Zone includes channel 1, ISL 82, ISL 83, and Grid 4.
The unique characteristic of these zones is that each channel is defined with two control unit device
ports and one of the control unit device ports, Grid 4, is in both zones. In a traditional TI Zone
definition, these zones would have to be combined to provide the appropriate connectivity, but in the
event of an ISL failure, this configuration would lead to a multi-hop, multi-emulation path that would
severely affect performance. Multi-hop paths are not certified for FICON configurations.
Maintaining and Troubleshooting FICON
86
FICON Administrator's Guide
53-1003144-01