Calculate MTU Size

Posted on 2009-04-20
Last Modified: 2013-06-15
Do I need to consider about the MTU size to build up a VPN tunnel between two office ? Should I need to consider the overhead for TCP header, IP header ? eg  I may need to set MTU to 1450 (or less) to ensure  additional overhead during the transmission. How to estimate the MTU for two location ?


Question by:AXISHK
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    Assisted Solution


    You can try to set MTU size to 1450 and then go down by 100 or 200 and see the difference,  if its better then try decreasing by 50 and then see the differens.

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    Expert Comment

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    Accepted Solution

    Here is another site that gives specific instructions.

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