HP StorageWorks 1510i Modular Smart Array iSCSI concepts and deployment guide (431338-002, July 2008)

NOTE:
HP strongly recommends enabling Spanning Tree on the switch ports as a means to identify and
dynamicallyblockcertainswitchportsthatcouldcreatenetworkloops.
The following illustration shows using VLANs in a network with multiple servers to control access to an
MSA1510i.
A VLAN ID set to “0” or “none” (default) implies that untagged packets are generated by the MSA1510i,
and, depending on how the switch is configured, untagged packets may be associated with a VLAN.
Switches allow a physical port to be associated with only one VLAN containing untagged packets;
otherwise, tagged packets are required. Because the MSA1510i management and storage logical
ports share a physical port, when setting up VLANs, the management port, the storage port, or both
require tagged settings.
Initiators can participate on the various VLANs. The exception, if the server can provide sufficient port
counts, is that the switch can segregate the untagged ports among the VLANs. In the previous illustration,
if the server only needs to participate on VLAN 2 and VLAN 3 and there were two NIC ports from
the server connected, one could simply leave all of the packets from the server untagged and assign
those untagged packets to each of the VLANs.
Physical MSA1510i Ethernet iSCSI port
Physical switch port
SA0 MA0
Valid configuration
1
Untagged to VLAN 2 Untagged to VLAN 3
No
1
Tagged to VLAN 2 Tagged to VLAN 3
Yes
1
Tagged to VLAN 2 Untagged to VLAN 3
Yes
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M SA 1510 i ov e r v iew