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Re: [dhcwg] I-D Action: draft-ietf-dhc-rfc3315bis-09.txt - questions about Solicit Prefix Delegation - src LL vs GUA

Roy Marples <roy@marples.name> Wed, 15 November 2017 08:50 UTC

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To: Ted Lemon <mellon@fugue.com>, "Templin, Fred L" <Fred.L.Templin@boeing.com>
Cc: "dhcwg@ietf.org" <dhcwg@ietf.org>, Alexandre Petrescu <alexandre.petrescu@gmail.com>, "Bernie Volz (volz)" <volz@cisco.com>
References: <149869621720.6575.278128190348174876@ietfa.amsl.com> <08e4e953-3a68-d6cb-6066-f60514ef0ac5@gmail.com> <3285281858d043649d507b6bda7b8646@XCH-ALN-003.cisco.com> <1f94b780-59c1-42ce-936d-0c8a71143444@gmail.com> <37917a26062f4e4c9715d324604e4d01@XCH-ALN-003.cisco.com> <d944ac55-d67d-d7d4-8eeb-f60438fdda2d@gmail.com> <35558A79-C176-4D71-9E91-4BDB19DDD006@cisco.com> <67ba54d2-d53f-82bf-93c9-1b92631ef4e8@gmail.com> <86409a9acb7846ddbdff42c58328e7d6@XCH-ALN-003.cisco.com> <eccd5dd2-3542-fdbc-89a2-7d13d563163d@gmail.com> <2fbc8325961c49a1944e3ee216fcb032@XCH-ALN-003.cisco.com> <a3f9cd45-403a-c6f6-6e9a-98a9b651a339@gmail.com> <4c25045f863a4e368f58a5a4a3917bde@XCH-ALN-003.cisco.com> <37918108-c5ed-a82d-2d97-227388ec25d0@gmail.com> <1A785964-1088-4081-B7DC-58E3CD9B0605@cisco.com> <9bad26dc5b2d42ee9cca47adb32eedc0@XCH15-06-08.nw.nos.boeing.com> <DB4FB172-B3CB-4471-9E07-A4CEE34D6A82@fugue.com>
From: Roy Marples <roy@marples.name>
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Date: Wed, 15 Nov 2017 08:50:03 +0000
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Subject: Re: [dhcwg] I-D Action: draft-ietf-dhc-rfc3315bis-09.txt - questions about Solicit Prefix Delegation - src LL vs GUA
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On 20/10/17 20:52, Ted Lemon wrote:
> On Oct 20, 2017, at 4:46 PM, Templin, Fred L <Fred.L.Templin@boeing.com 
> <mailto:Fred.L.Templin@boeing.com>> wrote:
>> Sorry I am late to this discussion, but AERO uses link-local source 
>> address for
>> all DHCPv6 PD messaging. It works in the public domain implementations I
>> have been working with.
> 
> It's actually nonsensical to use some other address.   One of the 
> purposes of DHCP is to get addresses, so if the server assumes you 
> already have one, how's that going to work?

That's not true.
Often you need to use a non link-local source address when the server 
sends OPTION_UNICAST with a non link-local address and you want to renew 
the lease.

Roy

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