Brian, > -----Original Message----- > From: Brian Dickson [mailto:[EMAIL PROTECTED] > Sent: Wednesday, January 02, 2008 5:30 PM > To: Templin, Fred L > Cc: Iljitsch van Beijnum; Routing Research Group list; Dino > Farinacci; Tony Li > Subject: Re: [RRG] MTU/fragmentation AGAIN ... > The real benefit is that, like SIIT, it is feasible to do ICMP > transliteration, thus support PMTUD and similar activities. > That, and not affecting the PMTU itself in the first place. :-)
Among the myriad issues that have us scratching our heads, SIIT doesn't work when a middlebox returns an ICMP PTB that only includes the minimum 8 bytes beyond the IP header of the packet-in-error. FWIW, net/ipv6/sit.c in the Linux kernel distro has the following to say about SIIT: + #ifndef I_WISH_WORLD_WERE_PERFECT + + /* It is not :-( All the routers (except for Linux) return only + 8 bytes of packet payload. It means, that precise relaying of + ICMP in the real Internet is absolutely infeasible. + */ Fred [EMAIL PROTECTED] -- to unsubscribe send a message to [EMAIL PROTECTED] with the word 'unsubscribe' in a single line as the message text body. archive: <http://psg.com/lists/rrg/> & ftp://psg.com/pub/lists/rrg
