set the linux box at the far end of the link to ALWAYS_DEFRAGMENT
David Lang
On Thu, 26 Aug 1999, Stephen R. van den Berg wrote:
> Date: Thu, 26 Aug 1999 00:40:02 +0200
> From: Stephen R. van den Berg <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: Re: Turning 30% packet loss into 0% packet loss
>
> David Lang wrote:
> >the TCP stack already deals with fragments (including duplicates) doesn't
> >this process include source/dest ip/port and a sequence number? wouldn't
> >this (usually) merge both packets back togeather if they get fragmented on
> >the way? if they are small packets this probably won't work, but you would
> >not be as worried about duplicating them anyway.
>
> It does, but only at the very end of the link. In between, the duplicates
> cross the whole Internet on their way to the target. The target receives
> them both and discards whatever comes second.
>
> This will kill performance at the receiving end if the duplicated packets
> are large.
> If one limits it to small packets <64 bytes, it probably won't affect
> the receiving end's bandwidth directly, but it will, indirectly, because
> it increases the amount of traffic otherwise flowing in that direction
> through the Internet at large (which is why it helps if the duplicates
> can be filtered out earlier).
> --
> Sincerely, [EMAIL PROTECTED]
> Stephen R. van den Berg (AKA BuGless).
>
> "Father's Day: Nine months before Mother's Day."
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