
Chapter 3. Connectivity 105
Once the ISLs are operational, any changes to the ISL connections will be checked by
switches within the fabric before they can be used (the connected switches must be in the
switch fabric list). With this checking, if an ISL is incorrectly installed, the fabric is designed to
stop using the links for customer data streams, thereby preventing frames from being
delivered to the wrong end points.
Enhanced Multiple Image Facility
The Enhanced Multiple Image Facility (EMIF) enables FICON channel sharing among PR/SM
logical partitions running on the z900 server. This is discussed in “Enhanced Multiple Image
Facility” on ...