Re: routers - (was: Re: "ROUTERS" vs. "routers")

[Fred Templin <[e-mail]>]

Fred Templin wrote:

> The two ways I see to do this are to either specify a new IPv6 ND option
> (call it a "Type II Router Solicitation" for lack of a better name) or 
> to add
> bits to the existing IPv6 Router Soliciation message (e.g., in the 
> "Reserved"
> field) that indicate the type of information being solicited. 


To respond to my own post, it just occurred to me there may be
a  least one other possibility (and probably countless others) to
get the needed message types. Maybe we could hijack an unused
ICMPv6 Type code from the IANA registries?

A quick look at the 'icmpv6-parameters' registry shows:

 138  Router Renumbering                               [Crawford]
 139  ICMP Node Information Query                      [Crawford]
 140  ICMP Node Information Response                   [Crawford]

I see that the Router Renumbering option is used by RFC 2894,
but does anyone know if the other options are used anywhere?

If not, the "Node Information Query" would be a perfect fit
for the "Type II Router Solicitation" I've been asking about,
and the "Node Information Response" could be used to carry
the Route Information Options needed by:

  
http://www.ietf.org/internet-drafts/draft-ietf-ipv6-router-selection-02.txt

instead of hacking the IPv6 Router Advertisment message format.
Sounds like a win-win, doesn't it?

Matt, can you comment as to the availability of the Type codes?

Thanks - Fred
[e-mail]





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