Re: [dhcwg] [Int-dir] Intdir early review of draft-ietf-dhc-rfc3315bis-10

"Bernie Volz (volz)" <volz@cisco.com> Wed, 01 November 2017 13:27 UTC

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From: "Bernie Volz (volz)" <volz@cisco.com>
To: Zhen Cao <zhencao.ietf@gmail.com>, "int-dir@ietf.org" <int-dir@ietf.org>
CC: "dhcwg@ietf.org" <dhcwg@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "draft-ietf-dhc-rfc3315bis.all@ietf.org" <draft-ietf-dhc-rfc3315bis.all@ietf.org>
Thread-Topic: [Int-dir] Intdir early review of draft-ietf-dhc-rfc3315bis-10
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Date: Wed, 1 Nov 2017 13:27:14 +0000
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Subject: Re: [dhcwg] [Int-dir] Intdir early review of draft-ietf-dhc-rfc3315bis-10
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Hi Zhen:

First, thanks for the Int-Dir review.

Regarding your comment, the cases where both MRC and MRD are zero is for a Solicit and Information-Request. And, for those particular cases, the client should probably retransmit "forever" at a hopefully low rate (SOL_MAX_RT and INF_MAX_RT are 3600 seconds*) to locate a  DHCP server. This of course depends on the RA M & O bits (indicating a DHCP server is available) or the manual configuration of the client (to explicitly run DHCP).

* - RFC 3315 used 120 seconds for these values, but that was updated by RFC 7083.

- Bernie

-----Original Message-----
From: Int-dir [mailto:int-dir-bounces@ietf.org] On Behalf Of Zhen Cao
Sent: Wednesday, November 01, 2017 3:41 AM
To: int-dir@ietf.org
Cc: dhcwg@ietf.org; ietf@ietf.org; draft-ietf-dhc-rfc3315bis.all@ietf.org
Subject: [Int-dir] Intdir early review of draft-ietf-dhc-rfc3315bis-10

Reviewer: Zhen Cao
Review result: Ready with Issues

I am an assigned INT directorate reviewer for this draft. These comments were written primarily for the benefit of the Internet Area Directors. Document editors and shepherds should treat these comments just like they would treat comments from any other IETF contributors and resolve them along with any other Last Call comments that have been received. For more details of the INT directorate, see <http://www.ietf.org/iesg/directorate.html>.

This version is quite ready to go, with a small issue that I would like to
discussion:

In Section. 15 (Reliability of Client Initiated Message Exchanges), I strongly recommend that implementation MUST NOT set both MRC or MRD to ZERO, which attaches a possible risk that the client continues to send this message without
a stop.    So I would like to propose the following change:

s/
" If both MRC and MRD are zero, the client continues to transmit the
   message until it receives a response."
/
"The client must be informed with a limit of its retransmission behavior, and MUST NOT set both MRC and MRD to zero"

-zhen


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