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Exchange 2010 DAG across a WAN connection (VPN)

    Pertanyaan

  • Hello,

    I am running into an issue with our Exchange DAG. We currently have a single Exchange server on-premises hosting about 40 mailboxes. We have a 2nd Exchange server at our datacenter connected via VPN with a 50Mbps comcast connection. Recently, Comcast swapped an old model (motorola surfboard I believe) for a new Docsis 3.0 unit. Ever since, the DAG still replicates correctly, however all other traffic over the Comcast WAN is significantly much slower. Web traffic suffers 5 second delays and loads web pages slowly. Speed tests show about 5Mbps down. As soon as we disable the VPN or take down one of the Exchange servers, web traffic is speedy and speed tests show around 50Mbps.

    I suspect the issue could be with how the Comcast Docsis router is handling replication traffic, but I am not entirely sure at the moment. Is there something I am missing or something I should be trying to prove or disprove this theory? I saw this KB http://support.microsoft.com/kb/951037 mentioned in another thread http://social.technet.microsoft.com/Forums/zh/exchange2010/thread/57fc122f-f6ef-469f-8af0-6985edea7589, and thought about giving it a try. Thoughts? Thanks in advance.

    21 Juni 2012 22:06

Jawaban

  • Hi GIchicago,

    Per your description, that seems the replication flow cost too much bandwidth, and per my know, we could configure the different session to use different bandwidth on the network devices.
    Actually, it is mostly like a network issue.

    Regards! 

    Gavin

    TechNet Community Support

    25 Juni 2012 7:36
    Moderator

Semua Balasan

  • Start with perfmons [http://technet.microsoft.com/en-us/library/ff367871.aspx] and pay special attention to the replication counters.

    Can you also check utilization of the link?


    Casper Pieterse, Principle Consultant - UC, Dimension Data North America, Microsoft Certified Master: Exchange 2007 / 2010

    22 Juni 2012 13:15
  • Hi GIchicago,

    Per your description, that seems the replication flow cost too much bandwidth, and per my know, we could configure the different session to use different bandwidth on the network devices.
    Actually, it is mostly like a network issue.

    Regards! 

    Gavin

    TechNet Community Support

    25 Juni 2012 7:36
    Moderator
  • "we could configure the different session to use different bandwidth on the network devices."

    How would I go about this?

    30 Juli 2012 15:30
  • Hi GJIchicago,

    You could post the issue on the network forum, per my know, some network devices could achieve that.

    Regards!

    Gavin

    TechNet Community Support

    02 Agustus 2012 3:09
    Moderator