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:
Do not configure any two iSCSI interfaces on the same subnet. Each iSCSI interface must
be on a seperate subnet.
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.
Direct iSCSI connections from the host to the storage subsystem are not supported.
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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