SOS - How to find out MTU on Windows

Discussion in 'Windows Networking' started by TJ, Apr 18, 2006.

  1. TJ

    TJ Guest


    Could some one please tell me how to find out MTU on Windows 2003?
    'ipconfig /all' doesn't show that information.

    Also, how to find out "path MTU", from one host to the other?

    Thanks a lot!

    TJ, Apr 18, 2006
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  2. TJ

    Bob Eager Guest

    There's not a lot of point cross-posting this to an OS/2 newsgroup, is
    there? OS/2 is a completely different, and arguably superior, system
    that has the great advantage of not coming from Microsoft. Most of us
    don't use Windows at all.
    Bob Eager, Apr 18, 2006
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  3. TJ


    Why not use the help file provided by 2003 windows.

    In <44442588$0$6274$>, on 04/17/2006
    at 06:31 PM, "TJ" <> said:

    , Apr 19, 2006
  4. TJ


    Jan 24, 2011
    Likes Received:
    Since I found this thread first during my quest to find a way to display (as opposed to derive) an IP interface's MTU, I figured I'd feed back the answer I found elsewhere.

    First, make sure the service called "Routing and Remote Access" (aka. "RemoteAccess") is started. It doesn't have to be started automatically; just running before you type the next command.

    In Windows XP, type the following command at the DOS/Command prompt:

    C:\>netsh interface ip show interface

    The output will show you all kinds of cool things, including:

    Index: 3
    User-friendly Name: Local Area Connection
    GUID Name: {89821586-54FD-44ED-8AD3-3E03A8CB9414}
    Type: Ethernet
    MTU: 1500
    Speed: 100000000
    Physical Address: 00-24-7E-DA-36-A1
    Admin Status: Up
    Operational Status: Operational
    Last Change: 1250607780
    In Octets: 165402429
    In Unicast Packets: 158190
    In Non-unicast Packets: 33207
    In Packets Discarded: 0
    In Erroneous Packets: 0
    In Unknown Protocol Packets: 0
    Out Octets: 19486587
    Out Unicast Packets: 115312
    Out Non-unicast Packets: 2197
    Out Packets Discarded: 0
    Out Erroneous Packets: 0
    Output Queue Length: 0
    Description: Intel(R) 82567LM Gigabit Network Connection
    - Packet Scheduler Miniport

    For Vista, I've been told that the command is now 'netsh interface ipv4 show subinterface', but I have no proof of that.

    – Dave
    Last edited: Jan 24, 2011
    ViperGeek, Jan 24, 2011
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