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Re: [nemo] Re: [Mip6] Consensus call on making ID draft-wakikawa-nemo-v4tunnel a MIP6/NEMO WGs document

Alexandru Petrescu <Alexandru.Petrescu@motorola.com> Fri, 01 April 2005 09:18 UTC

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Date: Fri, 01 Apr 2005 11:14:44 +0200
From: Alexandru Petrescu <Alexandru.Petrescu@motorola.com>
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To: Sri Gundavelli <sgundave@cisco.com>
Subject: Re: [nemo] Re: [Mip6] Consensus call on making ID draft-wakikawa-nemo-v4tunnel a MIP6/NEMO WGs document
References: <456943D540CFC14A8D7138E64843F8535BAD25@daebe101.NOE.Nokia.com> <424C3EF8.5050507@levkowetz.com> <424C5733.103@iprg.nokia.com> <Pine.GSO.4.58.0503311354430.25110@irp-view8.cisco.com>
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Cc: nemo@ietf.org, mip6@ietf.org, Vijay Devarapalli <vijayd@iprg.nokia.com>, Henrik Levkowetz <henrik@levkowetz.com>, Basavaraj.Patil@nokia.com
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Sri Gundavelli wrote:
> We have implementations based on draft-thubert-nemo-ipv4-traversal
> and some good thinking went in to that proposal and it is
> important that we review all these solutions in the context
> of the agreed upon problem space.

We also have an implementation but it is not documented, however, 
experiments were reported on Section 3 of expired draft 
draft-lach-nemo-experiments-overdrive-01.txt http://tinyurl.com/3om6x

It uses IPv6 in UDPv4 for NAT traversal.  The HA and the Gateway are not 
co-located.

That does not use IPv4 CoA for MIP6 simply because when behind NAT it's 
little relevant.

It uses UDP port scanning to find out open ports and 15s icmp "heart 
beats" to maintain port state unchnaged in the NAT devices.

When sending big packets over asymmetric wireless links (like GPRS and 
UMTS) the v4 stack fragments but the v6 stack does not fragment.

Alex

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