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Equallogic PS4100 - multiple subnet iSCSI

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Equallogic PS4100 - multiple subnet iSCSI

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Hi,

We are currently running a hyper-v cluster where each hosts has two NIC's for iSCSI-traffic.

One NIC is on the "10.240.0"-subnet and the other is on the "10.240.1"-subnet.
Our current storage is Fujitsu Eternus and it works fine with the "dual subnet"-setup.

We now want to integrate our old Equa PS4100-box into this setup but from what I can tell it doesn't support a multiple subnet iSCSI-setup.

Can anyone confirm this and if so, is there a way around the problem?

Thanks in advance,
Br, / Johan

All Replies
  • Hello Johan, 

      You are correct, by design the Dell PS Series SAN operates on a single subnet.  If you have full routing between the subnets you could "make" it work.  However, then the router is a failure point, potential bottleneck and if you lose the segment that has the Group IP that also could result in lost connections. 

     Also the network switches need to be trunked or stacked together.  

     Do you have any other NICs to segment the traffic? 

     Regards, 

    Don 

    Social Media and Community Professional
    #IWork4Dell
    Get Support on Twitter - @dellcarespro

  • Thanks for the reply.

    Unfortunately there are no more NIC's available so we're kinda stuck.

    What would happen if we were to multi-home the iSCSI NIC's on the hosts?
    For example: We give both NIC's an additional IP on a new subnet, let's say "10.240.10" and then setup the PS4100 to use that network.

    Regards,

    Johan

  • Hello, 

     Are the switches trunked together?  EQL expects that it can use any NIC to any port on the array. Periodically it may balance a connection to a different port on the array. 

     Don 

    Social Media and Community Professional
    #IWork4Dell
    Get Support on Twitter - @dellcarespro