[96009] in North American Network Operators' Group
RE: Thoughts on increasing MTUs on the internet
daemon@ATHENA.MIT.EDU (Mikael Abrahamsson)
Fri Apr 13 11:28:03 2007
Date: Fri, 13 Apr 2007 17:27:03 +0200 (CEST)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: NANOG list <nanog@merit.edu>
In-Reply-To: <B925B320C2655641ADBBFC00B1F0B820109CD4@ukbb3.ukbroadband.com>
Errors-To: owner-nanog@merit.edu
On Fri, 13 Apr 2007, Leigh Porter wrote:
> What would be good is if when a jumbogram capable path on the Internet
> exists, jumbograms can be used.
Yes, and it would be good if PMTUD worked, and ECN, oh and large
UDP-packets for DNS, and BCP38, and... and... and.
The internet is a very diverse and complicated beast and if end systems
can properly detect PMTU by doing discovery of this, it might work.
Requiring the core and distribution to change isn't going to happen
overnight, so end systems first. Make sure they can properly detect PMTU
by use of nothing more than "is this packet size getting thru" (ie no
ICMP-NEED-TO-FRAG) or alike, then we might see partial adoption of larger
MTU in some parts and if this becomes a major customer requirement then it
might spread.
--
Mikael Abrahamsson email: swmike@swm.pp.se
