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VMware: upgrade VMware Tools and Virtual Hardware for Microsoft ISA array

René Jorissen on June 15, 2010 • 2 Comments • Tags: #array #duplicate #hardware #igmp #ip #isa #nlb #tools #upgrade #virtual #vmware

Today I have been troubleshooting problems with a Microsoft ISA array. The array didn’t function anymore after moving the Configuration Storage Server and one array member from a VMware 3.5 environment to a VMware 4.0 environment. After moving the array member the VMware Tools were upgraded and also the Virtual Hardware was upgraded. After rebooting the moved array member the customer received multiple error messages, like duplicate IP addresses and users not able to access resource through the reverse proxy.

A Microsoft ISA array uses Network Load-Balancing and NLB was the cause of all problems. After upgrading the VMware Tools and the Virtual Hardware, NLB needs to be reconfigured. The complete configuration of NLB was lost. I reconfigured NLB (multicast with IGMP support) and the problem was resolved. The array members were functioning properly again.

Moving and upgrading the second array member resulted in the same problems with the same cause. Reconfiguring NLB on the second array member did the trick. So be careful when moving ISA array members with NLB configured from a VMware 3.5 to a VMware 4.0 environment, especially when upgrading VMware Tools and the Virtual Hardware.

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René Jorissen

Co-owner and Solution Architect at QMonkeys
René Jorissen works as Solution Architect for QMonkeys in the Netherlands. Network Infrastructures are the primary focus. René works with equipment of multiple vendors, like HPE Networks, FortiNet, SentinelOne, Phished, Holm Security, Microsoft services and many more. René is Aruba Certified Edge Expert (ACEX #26), Aruba Certified Mobility Expert (ACMX #438), Aruba Certified ClearPass Expert (ACCX #725), Aruba Certified Design Expert (ACDX #760), CCNP R&S, FCNSP and Certified Ethical Hacker (CEF) certified. You can follow René on Twitter and LinkedIn.
  1. Conor says:
    June 21, 2012 at 5:18 pm

    Hi I am having exactly this issue, just wondering did you ever get a reoslution to it and if so maybe you could share the steps taken to get it resolved

    thanks

    C

  2. René Jorissen says:
    June 21, 2012 at 6:25 pm

    Hey Conor,

    As you can read in the post, I resolved the issue by reconfiguring NLB. That did the trick for me. The NLB configuration was lost. In my opinion due to the new virtual hardware.

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