IBM DS3950, Installation, User'S, And Maintenance Manual, Page: 116 / 252

iSCSI configurations
The DS3950 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.
Note: The minimum DS3950 configuration is two partitions. The maximum is 128
partitions. Configuration upgrades are available as upgrade options. Contact
your IBM reseller or marketing representative for more information.
DS3950 host iSCSI configurations
This section provides the following examples of DS3950 host iSCSI configurations:
v
Single-host, multiple-port configuration, as shown in Figure 60 on page 89
v
Multiple-host, multiple-port configuration, as shown in Figure 61 on page 89
v iSCSI and Fibre Channel hosts, multiple-port configuration, as shown in
Figure 62 on page 90
v
Example of an incorrect configuration: Single-host, iSCSI and Fibre Channel, as
shown in Figure 63 on page 91
v
Multiple-host, multiple-port, multiple-switch configuration, as shown in
Figure 64 on page 92
Notes:
1. The DS3950 does not support direct connections from the host systems to the
iSCSI ports on the storage subsystem.
2. The DS3950 does not support connections to both iSCSI and Fibre Channel
ports from the same host system.
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
Storage
subsystem
Figure 59. Example of a two-cluster configuration
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IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide