Re: [dhcwg] Mirja Kühlewind's No Objection on draft-ietf-dhc-relay-port-07: (with COMMENT)

Suresh Krishnan <suresh.krishnan@gmail.com> Mon, 13 November 2017 10:18 UTC

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From: Suresh Krishnan <suresh.krishnan@gmail.com>
Date: Mon, 13 Nov 2017 18:18:54 +0800
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To: "Mirja Kuehlewind (IETF)" <ietf@kuehlewind.net>
Cc: "Bernie Volz (volz)" <volz@cisco.com>, "draft-ietf-dhc-relay-port@ietf.org" <draft-ietf-dhc-relay-port@ietf.org>, "dhcwg@ietf.org" <dhcwg@ietf.org>, The IESG <iesg@ietf.org>, "dhc-chairs@ietf.org" <dhc-chairs@ietf.org>
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Subject: Re: [dhcwg] =?utf-8?q?Mirja_K=C3=BChlewind=27s_No_Objection_on_draft?= =?utf-8?q?-ietf-dhc-relay-port-07=3A_=28with_COMMENT=29?=
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Hi Mirja,

On Mon, Nov 13, 2017 at 1:38 PM, Mirja Kuehlewind (IETF)
<ietf@kuehlewind.net>; wrote:
> Hi Bernie,
>
>
>> Am 13.11.2017 um 11:57 schrieb Bernie Volz (volz) <volz@cisco.com>;:
>>
>> Hi:
>>
>> A DHCP Server does not need to listen on other ports. Only the relay that wants to use an alternative port for responses needs to listen on alternate port(s).
>
> Right. And you don’t think that that has any new security implications?
>>
>> Regarding the updates issue, this is always a complex question - does a new DHCP option update these documents? I believe that updates should be used for required changes to a protocol (or corrections), not for extensions. It is too bad there is no “extends” tag to indicate extensions.
>
> I agree the option would not require an update but the text changes do.

The mechanism specified in this document is not generically applicable
to implementers of RFC3315 and RFC2131. Only relay nodes that run the
relay processes on non ports need to implement this spec. I think
making this document update RFC3315/2131 would cause more harm than
good.

Thanks
Suresh