IBM DS3500

Single-controller iSCSI connections: The following illustration shows a single
controller storage subsystem that is attached to a single host. This configuration
has no redundancy.
A system with dual iSCSI ports can provide enhanced performance compared to a
system that uses only one iSCSI port.
The following illustration is an example of a host that is using multiple ports that are
attached to a single-controller configuration. This configuration provides some path
redundancy.
The following illustration is an example of multiple single-port host systems that are
connected to a single-controller DS3500 using multiple connections.
Gigabit
Ethernet
switch
Host system
with one iSCSI
connector
DS3500
Figure 57. Single-host, single-controller iSCSI configuration
Gigabit
Ethernet
switch
DS3500
Host system
with two iSCSI
connectors
Figure 58. Multiple-port, single-controller iSCSI configuration
60 System Storage DS3500 and EXP3500: Installation, User’s, and Maintenance Guide