[nanomsg] Re: initial code repo for Go version of SP protocols

  • From: Martin Sustrik <sustrik@xxxxxxxxxx>
  • To: nanomsg@xxxxxxxxxxxxx
  • Date: Mon, 24 Mar 2014 09:10:27 +0100

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On 24/03/14 09:02, Dirkjan Ochtman wrote:
> On Mon, Mar 24, 2014 at 6:08 AM, Martin Sustrik
> <sustrik@xxxxxxxxxx> wrote:
>> That obviously entails that all messages exceeding path MTU will
>> be dropped silently.
> 
> Would it be possible to do that non-silently?

Not really. Without PMTU discovery you don't know what the minimal MTU
is on the path. So you send a packet and expect it will get through.
When a router gets a packet it cannot forward it it will drop it and
send an ICMP notification back to the sender. However, ICMP itself is
unreliable, so the sender may not be notified at all.

Martin

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