The following figure shows an extender connection, in which channel extenders and switches are used to connect the devices across large distances. Host Mode Option 51 (Round Trip Set Up) improves host I/O response time for long distance (100 km) switch connections. Make sure that the extender supports remote I/O. For more information contact customer support.
Set the Fabric to ON for the bidirectional port, and then set the topology to Point-to-Point.
CAUTION:
Data traffic might concentrate on one switch when you perform the following actions:
- Use a switch to connect the primary system and the secondary systems with an extender
- Gather several remote copy paths in one location
If you are using a Hitachi switch to make the connection, contact customer support.