I currently am using a Dell MD3200i iSCSI SAN and 2 host server nodes, running 2008R2. As of right now, the servers are direct attached to the SAN (there's no switch in between)
I wanted to test performance by introducing a switch, to see if things like MPIO boost throughput. I have about 8 ports to spare on my Cisco 3560X so I wanted to use that.
This is the current IP setup
Controller 0, Slot 1 - 172.16.1.101/24
Controller 0, Slot 2 - 172.16.2.101/24
Controller 0, Slot 3 - 172.16.3.101/24
Controller 0, Slot 4 - 172.16.4.101/24
Controller 1, Slot 1 - 172.16.1.102/24
Controller 1, Slot 2 - 172.16.2.102/24
Controller 1, Slot 3 - 172.16.3.102/24
Controller 1, Slot 4 - 172.16.4.102/24
Node 1, iSCSI NIC 1 - 172.16.1.11/24 (connects to port 0/1)
Node 1, iSCSI NIC 2 - 172.16.2.12/24 (connects to port 1/2)
Node 2, ISCSI NIC 1 - 172.16.2.11/24 (connects to port 1/1)
Node 2, iSCSI NIC 2 - 172.16.1.12/24 (connects to port 0/2)
There is no gateway defined as they are direct connected at the moment.
All documentation I've read show how to cable the switch, the SAN and the host nodes, but there has been no mention of how to configure the switch. I'm a little confused as to how we're to isolate iSCSI traffic from production, yet allow the multiple iSCSI subnets to communicate with each other.
Does there need to be one big VLAN, or 4 seperate little VLAN's?
Should there be more than just the 2 paths in the iSCSI initiator that we currently have on each server once everything goes to a switch?
I'm just a little confused as to how the networking will work with a switch, instead of direct connecting. I do know i need to enable jumbo frames/set the MTU on the switch, as well as enabling flowcontrol, and portfasting the iSCSI ports on the switch. I'm just hazy on the proper network settings and getting the iSCSI initiator properly set up once using a switch.