[Olsr-users] OLSR routing issue with highly connected node

[Teco Boot]

DF=1 and no PMTUD makes no sense.
Having a function that circumvent fragments is great. But set DF and discard PTB messages is wrong.

If both sides of a link have different MTU, there could still be a problem.

Teco

> Op 24 dec. 2014, om 12:48 heeft Henning Rogge <(spam-protected)> het volgende geschreven:
> 
> On Wed, Dec 24, 2014 at 10:46 AM, Jernej Kos <(spam-protected)> wrote:
>> Hello!
>> 
>> The absence of HELLOs led me to investigate the MTUs more closely and it
>> now seems that there is actually some issue with MTU discovery on the
>> broker side -- nodes configure the correct MTU towards the broker, but
>> the broker sometimes fails to configure correct MTU towards the nodes.
>> 
>> So this may be the cause of the problem and not OLSR as HELLOs from the
>> server might then be dropped as being too large when received at the
>> node. Will report back when I determine what is causing this.
> 
> Yes, I could see this becoming a problem.
> 
> olsrd uses the advertised MTU to make the packets as small as
> necessary and mark them as "do not fragment"... if the MTU is wrong,
> the packets might be dropped.
> 
> Henning Rogge
> 
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