Re: EDNS: OPT and forwarders

["Michael A. Patton" <MAP@pobox.com>]

   Date: Wed, 01 Apr 1998 11:28:44 -0800
   From: Paul A Vixie <paul@vix.com>

   3. require that EDNS not be used with a forwarder unless the client's config
      data indicates that a given forwarder does in fact understand EDNS.

Note that any server a client sends a request to _could_ be a
forwarder, the client doesn't know a priori which of the several
possible classes a server actually is, nor does it presently need to.

I'm not objecting to this approach.  In fact, I'm vaguely in favor of
it.  I just wanted to point out that it's just a generic config (i.e. in
bind's /etc/resolv.conf a flag on each nameserver line tellling
whether you're allowed to send it eDNS queries).  I'm not sure whether
that makes much difference to the usefullness of the approach, but it
should probably be documented...

	-MAP