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:-)
About implicit mode: Implicit mode, means that MIP signaling is NOT used to indicate the IPv6
addresses/prefixes for a given MN. How these address/prefixes are known
by the MN and the HA is simply outside the scope of this specification.
The MN can use DHCP prefix delegation, or HA and MN could be
preconfigured with IPv6 prefixes, or some other mechanism that I do not
know about may be used. There is nothing we need to say about any of
this here.
About encapsulation methods: When IPv6 is tunneled to the MN's IPv4 HoA, you get IPv6-in-IPv4 i.e.,
the HA encapsulates packets with destAddr==MN's IPv6 HoA, to an IPv4 tunnel with destAddr==MN's IPv4 HoA. Then, the IPv4 packets (with destAddr==MN's IPv4 HoA) are tunneled to the MN's CoA with whatever mechanism is negotiated in MIPv4 messages (IPinIP, Minimal Encapsulation etc). I think this is clear and the DS support does not interfere with the different MIPv4 tunnel types. If IPv6 is tunneled to the MN's CoA, however, then only IPv6-in-IPv4 is used i.e., the HA encapsulates packets with destAddr==MN's IPv6 HoA, in an IPv4 tunnel with destAddr==MN's IPv4 CoA. In that case the different MIP4 tunnel types are not used for this. I could add such clarification in the specification. Would that be acceptable to you?
Ok if one refers to rfc2529 (or another you may have thought), thanks.
Alex
-----Original Message-----
From: Alexandru Petrescu [mailto:alexandru.petrescu at gmail.com] Sent: Wednesday, June 27, 2007 4:29 PM
To: Tsirtsis, George
Cc: mip4 at ietf.org
Subject: Re: [Mip4] Working Group Last call for
draft-ietf-mip4-dsmipv4-02.txt
Tsirtsis, George wrote:Hi Alex,
Thanks for the review. I think this is the 2nd or 3rd one you provide
for this draft :-) I think most of the comments this time can be resolved easily.
I get your point, but I don't quite understand how you solve the issue of GRE, Minimal Encapsulation and IP-in-IP not supporting IPv6. Or how you assume HA to learn the IPv6 HoA in implicit mode by means outside this document.
Alex
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