Hello,
I'm also bringing this to the w.g. list, as I believe an RA option for
discovering DNS resolvers could be one very viable mechanism.
Generic comments:
1) It's not clear to me whether this option is to be included in periodic
unsolicited router advertisements, or only in explicit request-reply
pairs. Based on the fact that the option includes Code reply/query pair,
this seems likely to fall somewhere between the two of these.
The way spec is written, the routers which would support DNSR option would
not include it in every RA message. (This could be considered both a good
and a bad thing.)
2) perhaps it should be explicitly stated, for clarity, that unrecognized
DNSR options must be ignored by receivers by RFC2461.
3) Security considerations could use some additional considerations
related to adding DNS resolvers in the RS/RA messaging. At least it
should be mentioned -- I don't think there's necessarily all that
dangerous stuff out there, as if you use RA, you already have quite a lot
of trust in the system.
4) On systems which configure manually ie. disable RA-advertisements, I
believe this will also not be used?
Specifics:
The purpose is
also to enhance the efficiency of [DISCOVERY] when DHCPv6 servers can
not be used.
==> s/servers can not be/is not/
4.2.2 Passive mode
On any link a node MUST listen to Router Advertisements (DISCOVERY].
==> MUST is news to me. Did I miss something?
Purely editorial:
This document defines the DNS resolver (DNSR) option used to advertise
IPv6 addresses of DNS resolvers on a link.
==> "on a link" is an ambious reference: it could refer to _DNS resolvers_
on a link, or _advertising_ on a link.
Because of the deployment of IPv6 network, DNS resolution might
become a key issue.
==> please reword the first 7 words, they make no sense :-)
4.2.1 Active mode
If a node wants to learn the IPv6 addresses of available DNS
resolvers, it SHOULD send a "DNS resolver Query". A "DNS resolver
Query" is a Router solicitation with a DNSR option.
==> s/solicitation/Solicitation/
On any link a node MUST listen to Router Advertisements (DISCOVERY].
By that way a node may learn the IPv6 addresses of available DNS
resolvers in the case another node has just query for such an
information, and that a router has just replied by a Routeur
Advertisement including a DNSR option.
==> s/(/[/
==> s/query/queried/
==> s/Routeur/Router/
--
Pekka Savola "Tell me of difficulties surmounted,
Netcore Oy not those you stumble over and fall"
Systems. Networks. Security. -- Robert Jordan: A Crown of Swords
--------------------------------------------------------------------
IETF IPng Working Group Mailing List
IPng Home Page: http://playground.sun.com/ipng
FTP archive: ftp://playground.sun.com/pub/ipng
Direct all administrative requests to [EMAIL PROTECTED]
--------------------------------------------------------------------
