Re: [mobile-ip] Re: FW: I-D ACTION:draft-tsirtsis-dsmip-problem-0 0.txt

["EricLKlein" <ericlklein@softhome.net>]

From: "Francis Dupont" >

=> as a cross-version tunnel will never be "optimized" (i.e., MN-CN direct
> communication is not possible), IMHO mobile-ip solutions are clearly
> overkilling in this kind of environments: a smart "road warrior" IPsec
> VPN will be enough. Today two parts are missing:
>  - cross-version IPsec tunnels are not commonly available (note for
>    IPsec implementors: they are specified in RFC 2401, why do you not
>    support them?)


Are you recommending that all mobile phone operators should create IP VPN's
for all phones on their network and to maintain them for visitors and
roamers on other networks?

This sounds like a lot of IP VPNs to create and maintain across multiple
networks for people who roam, and unnecessary for those that don't. We are
not talking dial-up users or even data users, jut straight 3G, GPRS, or WAP
users.