North American Network Operators Group

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Re: PMTU-D: remember, your load balancer is broken

  • From: Andrew Brown
  • Date: Thu Jun 15 00:44:36 2000

>> The 576 value of the MS PPP MTU is merely a default - it can be
>> changed with a registry hack.
>Expecting the tens of millions of novice computer users to set their
>systems for a 1500 byte MTU is irrational.  Those who are knowledgeable
>enough to do so are generally reducing it due to "speed up your modem"
>articles and programs which improve interactive performance at the
>expense of throughput.

i think you have two things confused.  raising the mtu will "speed up
the modem" since you get more data for less overhead, however
*lowering* the mtu will increase interactivity, since each packet is
smaller, the transmit time is shorter, so the next one can get in/out
sooner.  you stand a better chance of getting a "word" in edgewise if
the other guy is using smaller "phrases".

|-----< "CODE WARRIOR" >-----|
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