IBM System Storage Subsystem DS5020 - Manual (Page 117)

Figure 60 shows an example of a two-cluster configuration.
iSCSI configurations
The DS5020 storage subsystem supports 1 Gbps iSCSI connectivity. You must
determine how the host systems will connect to the storage subsystem. The
illustrations in the following sections show common iSCSI host system
configurations.
The iSCSI ports support IPv4 and IPv6 TCP/IP addresses, CHAP, and iSNS. Use
either Cat5E or Cat6 Ethernet cable types for iSCSI port connections. A Cat6
Ethernet cable provides optimal performance.
Host system
with two host
adapters
Host system
with two host
adapters
Switch Switch
DS5020 DS5020
Figure 59. Example of two storage subsystems in a dual SAN environment
DS5020
Host system
with two host
adapters
Host system
with two host
adapters
Switch Switch
Host system
with two host
adapters
Host system
with two host
adapters
Switch
Switch
Cluster 1 Cluster 2
Figure 60. Example of a two-cluster configuration
Chapter 3. Cabling the storage subsystem 87