Jumbo frames and Veritas?

Discussion in 'Windows Networking' started by 5tac3, Dec 20, 2005.

  1. 5tac3

    5tac3 Guest

    I have two W2K3 SP1 Std. Ed. servers both with Intel Pro/1000 MT server
    adapters. One has E2K3 SP1 Std Ed. with Backup Exec 9.1 SP4a and a DDS4 tape
    backup unit. The other is a DC and a file server with the Remote Agent.
    Before I upped the frame size of both NICS to 9014 bytes on the two servers,
    Backup Exec downloaded and backed up the data from the file server/DC with
    the Remote Agent on it just fine. However, after I upped the frame size from
    the usual default size (1518 bytes) to 9014 bytes Backup Exec hasn't been
    able to see the file server/DC with the Remote Agent. Both servers can ping
    each other successfully and swap files using UNC and IP successfully. The
    topology is a flat single subnet network. Both servers are plugged into an
    SMC 8505T switch which supports said frame size. I tried to reinstall the
    Remote Agent by pushing it up from the server that has Backup Exec on it but
    it can't find the file server/DC. Any ideas?
    Stacey
     
    5tac3, Dec 20, 2005
    #1
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  2. Probably an unsupported frame size in the Backup Exec application. I would
    make sure BE can actually use this config before I go any further...

    Oliver
     
    Oliver O'Boyle, Dec 21, 2005
    #2
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  3. 5tac3

    5tac3 Guest

    Thank you for the response Oliver. I, reluctantly, changed the Jumbo Frame
    size from 9048 to 4088 on both servers and Backup Exec now works normally.
    Strange that BE would be sensitive at the physical layer. It's as if Veritas
    didn't take advantage of a networking API or something during development.
    Stacey
     
    5tac3, Dec 21, 2005
    #3
  4. Thank you for the response Oliver. I, reluctantly, changed the Jumbo
    could be. You should contact them though, and identify the issue. It could
    be a bug, or they may not have considered using the application in this
    environment. They may wish to create a hotfix for you.

    Good luck!
    Oliver
     
    Oliver O'Boyle, Dec 21, 2005
    #4
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