On Tue, Aug 8, 2017 at 4:50 PM, Fabrice Bacchella <
fabrice.bacche...@orange.fr> wrote:

>
> Le 8 août 2017 à 14:53, Moacir Ferreira <moacirferre...@hotmail.com> a
> écrit :
>
> But if you receive a 9000 MTU frame on an "input" interface that results
> sending it out on an interface of a 1500 MTU, then if you set DF bit the
> frame will just be dropped by the router.
>
>
> The frame will be dropped and the router will send an ICMP message "packet
> to big" to the sender, it's network stack will received that, learn that
> the PMTU is lower and try with smaller fragment, see
> https://en.wikipedia.org/wiki/Path_MTU_Discovery.
>

If they are allowed to cross and are not dropped by a firewall in the
middle... But I believe we are a bit far from the original discussion.
Y.


>
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