nanog mailing list archives
Re: IPv6 day and tunnels
From: Masataka Ohta <mohta () necom830 hpcl titech ac jp>
Date: Wed, 06 Jun 2012 06:44:22 +0900
Templin, Fred L wrote:
General statement for IPv6-in-IPv4 tunneling, yes. But inner fragmentation applies equally for *-in-* tunneling.Even though you assume tunnel MTU 1500BWhat I am after is a tunnel MTU of infinity. 1500 is the minimum packet size that MUST get through. 1501+ packets are admitted into the tunnel unconditionally in hopes that they MIGHT get through.
Infinity? You can't carry 65516B in an IPv4 packet.
My document also allows for outer fragmentation on the inner fragments. But, like the RFC4213-derived IPv6 transition mechanisms treats outer fragmentation as an anomalous condition to be avoided if possible - not a steady state operational approach. See Section 3.2 of RFC4213.
Instead, see the last two lines in second last slide of: http://meetings.apnic.net/__data/assets/file/0018/38214/pathMTU.pdf It is a common condition. Masataka Ohta
Current thread:
- Re: IPv6 day and tunnels, (continued)
- Re: IPv6 day and tunnels Masataka Ohta (Jun 04)
- RE: IPv6 day and tunnels Templin, Fred L (Jun 04)
- Re: IPv6 day and tunnels Masataka Ohta (Jun 04)
- RE: IPv6 day and tunnels Templin, Fred L (Jun 05)
- Re: IPv6 day and tunnels Masataka Ohta (Jun 05)
- RE: IPv6 day and tunnels Templin, Fred L (Jun 05)
- Re: IPv6 day and tunnels Masataka Ohta (Jun 05)
- RE: IPv6 day and tunnels Templin, Fred L (Jun 05)
- Re: IPv6 day and tunnels Masataka Ohta (Jun 05)
- RE: IPv6 day and tunnels Templin, Fred L (Jun 05)
- Re: IPv6 day and tunnels Masataka Ohta (Jun 05)
- RE: IPv6 day and tunnels Templin, Fred L (Jun 05)
- Re: IPv6 day and tunnels Masataka Ohta (Jun 05)
- RE: IPv6 day and tunnels Templin, Fred L (Jun 05)
- Re: IPv6 day and tunnels Masataka Ohta (Jun 05)
- Re: IPv6 day and tunnels Owen DeLong (Jun 05)
- Re: IPv6 day and tunnels Joe Maimon (Jun 06)
- Re: IPv6 day and tunnels Masataka Ohta (Jun 06)
- RE: IPv6 day and tunnels Templin, Fred L (Jun 07)
- Re: IPv6 day and tunnels Masataka Ohta (Jun 12)
- RE: IPv6 day and tunnels Templin, Fred L (Jun 12)