Re: I-D ACTION:draft-ietf-shim6-applicability-01.txt

[Igor Gashinsky <igor@gashinsky.net>]

Shim6 *is* a host multihoming solution, the only difference is that it 
doesn't use multiple NICs and puts the ip addresses all on one interface. 
Other then that, it's 100% host multihoming.

-igor

On Fri, 16 Jun 2006, Joe Abley wrote:

:: Hi Deguang,
:: 
:: On 16-Jun-2006, at 12:18, Deguang Le wrote:
:: 
:: > To my understanding, in Shim6 protocol sepcifications, it specifies that
:: > the host is within a multihomed site, so it is regarded as a site
:: > multihoming solution.
:: > 
:: > However, no matter the host is within a multihomed site or not, if only the
:: > host is multihomed and the given solution for solving the multihoming is a
:: > host-based solution. I think it belongs to a host multihoming solution.
:: > 
:: > Besides, there is no fundamental reason why the shim6 solution could not
:: > support the host multihoming.
:: 
:: "Host multihoming" usually refers to a host which has multiple network
:: interfaces. Since this is an issue of lexical convention and not technology,
:: I did a quick google to try and survey common usage of the phrase. I found
:: many references which support this definition, e.g.
:: 
:: http: //foldoc.org/?multihomed+host
:: http: //www.slac.stanford.edu/comp/net/policy/multi-homed.html
:: http: //docs.sun.com/app/docs/doc/806-0916/6ja853998?a=view
:: RFC 1123 section 6.1.3.4
:: RFC 2205 section 3.9
:: 
:: Clearly this is not an exhaustive review, but I will run with it for now :-)
:: 
:: There are aspects of host multihoming which are not part of the shim6
:: specification (e.g. the choice of egress interface and next-hop router that
:: the host uses for a particular outbound datagram). In this sense, shim6 as it
:: stands provides an inadequate specification for host multihoming.
:: 
:: It seems to me that, for this reason, "site multihoming" is a better phrase
:: than "host multihoming". However, given the host-centric approach that shim6
:: takes to site multihoming, additional text to this effect would quite
:: possibly lend clarity to the document in question.
:: 
:: Thoughts?
:: 
:: 
:: Joe
:: 
:: 
::