Subject: Re: Stupid ICMP and fragmentation tricks
To: Ignatios Souvatzis <email@example.com>
From: None <firstname.lastname@example.org>
Date: 09/22/1999 17:36:39
>Yes, but is it _correct_?
>That is, is PMTU discovery the one and only application, ever, of using the DF
>(Meaning: are we really allowed to fragment a DF packet anyway?)
We are not allowed to fragment a packet with DF bit.
See RFC791, page 8.
>> An internet datagram can be marked "don't fragment." Any internet
>> datagram so marked is not to be internet fragmented under any
>> circumstances. If internet datagram marked don't fragment cannot be
>> delivered to its destination without fragmenting it, it is to be
>> discarded instead.