[dhcwg] Re: Last Call: DHCP Domain Search Option to Proposed Standard
Thomas Narten <narten@raleigh.ibm.com> Fri, 28 September 2001 18:39 UTC
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To: Keith Moore <moore@cs.utk.edu>
cc: dhcwg@ietf.org
In-Reply-To: Message of "Thu, 27 Sep 2001 15:32:42 EDT." <200109271932.PAA20346@astro.cs.utk.edu>
Date: Fri, 28 Sep 2001 14:34:51 -0400
From: Thomas Narten <narten@raleigh.ibm.com>
Subject: [dhcwg] Re: Last Call: DHCP Domain Search Option to Proposed Standard
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Keith Moore <moore@cs.utk.edu> writes: (in a message sent to the iesg) > The problem I have with this option is that it invites implementors > and network administrators to presume that a host's domain should be > tied to a host's location in the network - when these are intentionally, > and by design, entirely separate. For instance, a mobile computer user > who wishes DNS lookups to be performed relative to a particular domain > should not have this choice overridden by each POP to which he connects. > (The fact that protocol designers often try to use DNS lookups as a > means to discover topologically close services does not change this. > There is an inherent conflict between using DNS as a way to discover > services relative to a domain and using it as a way to discover > services relative to a network location, but the intent of DNS > clearly favors the former.) > Host DHCP implementations therefore should not blindly accept Domain > Search information from a DHCP server. Local configuration of any > DNS information (including not just search domains, but also DNS servers) > should override anything supplied by DHCP. > Keith I am sympathetic with your general point. I'll also note that this arguably applies to a number of other existing DHCP options. I don't believe right off that this point is explicitely addressed in the other cases either. There is a general issue of when should (and shouldn't) a DHCP-learned option override a manually configured one. My guess is that DHCP-learned options generally do not override manually configured ones. But I suspect that this is all considered implementation specific. Can other DHC WG members comment? What do existing RFCs say about this point? Finally, what do you propose? I.e., "send text" :-) Would it suffice to add some language stating that in the case of this option, it should not override a manually configured search list? Thomas _______________________________________________ dhcwg mailing list dhcwg@ietf.org http://www1.ietf.org/mailman/listinfo/dhcwg
- [dhcwg] Re: Last Call: DHCP Domain Search Option … Thomas Narten
- Re: [dhcwg] Re: Last Call: DHCP Domain Search Opt… John Schnizlein
- [dhcwg] Re: Last Call: DHCP Domain Search Option … Keith Moore
- [dhcwg] Re: Last Call: DHCP Domain Search Option … Thomas Narten
- RE: [dhcwg] Re: Last Call: DHCP Domain Search Opt… Bernie Volz (EUD)