[153259] in North American Network Operators' Group
RE: IPv6 day and tunnels
daemon@ATHENA.MIT.EDU (Matthew Huff)
Mon Jun 4 06:41:43 2012
From: Matthew Huff <mhuff@ox.com>
To: Owen DeLong <owen@delong.com>, Jimmy Hess <mysidia@gmail.com>
Date: Mon, 4 Jun 2012 06:38:55 -0400
In-Reply-To: <D80CB26F-73C1-4B06-89F0-006BB6876C01@delong.com>
Cc: North American Networking and Offtopic Gripes List <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
>> An L2 device should not be fragmenting L3 packets.
Layer 2 fragmentation used (20+ years ago) to be a common thing with bridge=
d topologies like token-ring to Ethernet source-routing. Obviously, no so m=
uch anymore (at least I hope not), but it can and does happen.
I think part of the problem is that ISPs, CDN, hosting companies, etc. have=
assumed IPv6 is just IPv4 with longer addresses and haven't spent the time=
learning the differences like what was pointed out that ICMPv6 is a requir=
ed protocol for IPv6 to work correctly. MTU issues are an annoyance with IP=
v4 but are a brokenness with IPv6. Knowledge with come, but it may take a b=
it of beating over the head for a while.
