7914Cabling2-1908.fm Draft Document for Review March 28, 2011 12:24 pm
116 IBM System Storage DS3500: Introduction and Implementation Guide
Figure 4-26 Two hosts with redundant SAS connections to a dual controller DS3500
4.8.2 iSCSI attachment
The DS3500 supports iSCSI SAN, which utilizes the standard Ethernet infrastructure, using
standard Cat 5E and Cat 6 Ethernet cables on the host side. The DS3500 supports a
maximum of 64 hosts connecting through a gigabit ethernet network.
You should always follow these guidelines when connecting iSCSI hosts:
ň° Do not configure any two iSCSI interfaces on the same subnet. Each iSCSI interface must
be on a seperate subnet.
ň° If you are using DHCP on more than one interface, multiple interfaces can end up on the
same subnet. We recommend that you configure fixed IP addresses for the iSCSI
interfaces.
ň° Direct iSCSI connections from the host to the storage subsystem are not supported.
ň° You should always isolate iSCSI network traffic from your business network traffic by using
VLANs or seperate ethernet network hardware.
Attention: You must always connect the DS3500 iSCSI host ports to a gigabit Ethernet
switch. Direct attachment to host servers using iSCSI is not a supported configuration.
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