HP StorageWorks Data Replication Manager HSG80 ACS Version 8.7P Configuration Guide (AA-RPHZF-TE, March 2004)

Getting Started
53Data Replication Manager HSG80 ACS Version 8.7P Configuration Guide
■ Only one extended long wavelength ISL is allowed per fabric.
■ Cascaded switches are not supported in asynchronous transfer mode (ATM)
configurations.
Cascaded Switch Configurations
Figure 13 shows a DRM configuration that increases the distance between sites by using
cascaded switches and hopping. There are no hops from the initiator host to the initiator
controller and three hops from the initiator host to the target controller. There are four Fibre
Channel cascaded switches with no hops from the host and three hops to controller pair 2.
Hop 1 spans the shortest distance (500 meters), hop 2 spans 10 kilometers, and hop 3 spans the
longest distance, 100 kilometers.
Figure 13: Cascaded switches in a DRM environment
CXO7678A
Hop 1
Hop 2
Hop 3
Initiator site
Host 1
Target site
Host 2
Controller
Pair 1
Controller
Pair 2
10 KM
100 KM
500 meters