On Fri, Nov 25, 2005 at 12:53:37AM -0800, Vishwas Manral wrote: > Hi Janos, > > I think that is the minimum Link MTU and not the smallest size non-last > fragment. > > Can you point me to the RFC/ draft which says what you stated?
Yes, I believe that is the minimum link MTU. So, obviously one fragment might be smaller. I haven't seen anything say which fragment (reasonable that it is the last, but haven't seen anything saying it must be), and nothing prohibiting leaving several fragments smaller. Also, there is sadly nothing saying overlapping fragments are not allowed. Stig > > Thanks, > Vishwas > -----Original Message----- > From: Mohacsi Janos [mailto:[EMAIL PROTECTED] > Sent: Friday, November 25, 2005 1:27 PM > To: Vishwas Manral > Cc: ipv6@ietf.org > Subject: Re: IPv6 and Tiny Fragments > > > > > > On Thu, 24 Nov 2005, Vishwas Manral wrote: > > > Hi folks, > > > > > > > > I have been wondering how IPv6 will deal with the tiny fragment > attack, > > RFC1858. > > > > > > > > Is there a minimum non-last fragment size specified for IPv6? With so > > many extension headers a size of around 80bytes IP Header+ payload may > > not necessarily be right. > > > > It is defined to be larger than 1280 octets. > > Janos Mohacsi > Network Engineer, Research Associate > NIIF/HUNGARNET, HUNGARY > Key 00F9AF98: 8645 1312 D249 471B DBAE 21A2 9F52 0D1F 00F9 AF98 > > > > > > > I think, we could specify something closer to 200 bytes, which would > > mean that we would certainly have the TCP header in the first > fragment. > > > > > > > > Thanks, > > > > Vishwas > > > > > > > > > > > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
