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  • 1.  iSCSI Multipath on ESXi4

    Posted Dec 16, 2009 06:16 AM

    I’m confused with iSCSI multi-path configuration. I have a couple of ESXi4 servers and an IBM DS3300 with dual controllers. I have hosts with 4 NICS, 2 of which I was going to use for vm traffic and two I am going to use for iSCSI traffic.

    1st question. Should the two iSCSI VLANS be on different IP subnets? I know best practice is to have a separate switch, but this is not possible so the traffic will be VLANd. There will be two physical switches though so I have a connection from each server iSCSI port to each switch.

    2nd question. According to the VMware iSCSI config guide,there are two options:

    Port binding using a separate VMKernel port for each NIC to a single vSwitch

    Create a separate vSwitch for each NIC and vmKernel pair

    Is one method better than the other? I actually tried the first method as per the doc, but I get the “add nic failed in IMA” error when I try to bind the ports. I’ve ensured that only one NIC is active and the other is unused. I’ve checked postings here. Others have had similar issues, but I saw no solution.

    3rd question. Is there a definitive guide to setting up iSCSI multipath for ESXi 4? I know I’m asking much. The VMware doc seems a bit light in this area. Many of the other postings/blogs go on about a million other things to the point I’m even scared that the thing will even work!

    Thanks :smileyhappy:

  • 2.  RE: iSCSI Multipath on ESXi4

    Posted Dec 16, 2009 08:41 AM

    Update on the add nic failed in IMA. It was a syntax error. I was using the network label instead of the port name "vmk1".

    So I've solved one issue. The others are still outstanding :smileyhappy:

  • 3.  RE: iSCSI Multipath on ESXi4

    Posted Jan 16, 2010 05:59 PM