Dual-controller iSCSI configurations: The following illustration is an example of
a multiple port, single-host configuration. A system that uses multiple iSCSI ports
can provide enhanced performance compared to a single-port iSCSI connection.
For cluster configurations, the following illustration is an example of a multiple-host,
multiple-port, and redundant path and controller configuration.
You can replace the two gigabit Ethernet switches that are shown in Figure 63 on
page 63 with one large gigabit Ethernet switch that has the required number of
ports. Virtual local area network (VLAN) can also be used to isolate the two iSCSI
networks, instead of a single switch.
Gigabit
Ethernet
switch
Gigabit
Ethernet
switch
DS3500
Host system
with two iSCSI
connectors
Host system
with two iSCSI
connectors
DS3500
Figure 61. Multiple-host, multiple-port, multiple-storage-subsystem iSCSI configuration
Gigabit
Ethernet
switch
Host system
with two iSCSI
connectors
DS3500
Figure 62. Single-host, multiple-port, dual-controller iSCSI configuration
62 System Storage DS3500 and EXP3500: Installation, User’s, and Maintenance Guide
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