A ping (deterining MTU) question
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  1. April 4th, 2002, 06:14 PM #1
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    JonathanB
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    A ping (deterining MTU) question

    I want to know my optimum MTU so I connected to the internet, went to MS DOS, and typed >ping -f -l {my trial MTU} www.{my ISP} and clicked enter. From a trial number of 549 and above, I got a message "Packet needs to be fragmented but DF set",so I have to try a lower value. The last number possible which is 548 gave me a message:
    Request timed out
    Hardware error
    Hardware error
    Hardware error
    Packets sent 4 Received 0 Lost 4 (100% loss)
    Approximate round trip time Min 0 Max 0 Ave 0
    Anybody knows why is this?
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  2. April 7th, 2002, 07:35 AM #2
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    JonathanB
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    Well? I also got my answer. Its the firewall that blocked my echo request. Just for those who want to know.
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