Re: [dhcwg] DHCP Options for Network-Assisted Multipath TCP (MPTCP)

"Bernie Volz (volz)" <volz@cisco.com> Tue, 10 November 2015 02:57 UTC

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From: "Bernie Volz (volz)" <volz@cisco.com>
To: Dan Seibel <Dan.Seibel@TELUS.COM>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "dhcwg@ietf.org" <dhcwg@ietf.org>
Thread-Topic: [dhcwg] DHCP Options for Network-Assisted Multipath TCP (MPTCP)
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Date: Tue, 10 Nov 2015 02:57:32 +0000
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Subject: Re: [dhcwg] DHCP Options for Network-Assisted Multipath TCP (MPTCP)
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Dan:

Yes, the client should request this option. That is the normal behavior of clients.

And, yes, servers should only return the option if requested by the client.

Please see RFC 7227 and also my email regarding the ORO handling (Ticket #81 for the RFC3315 bis work).

And, Med ... a quick check of the options seems they are formatted correctly (as per the option guidelines and common practice).

- Bernie

-----Original Message-----
From: dhcwg [mailto:dhcwg-bounces@ietf.org] On Behalf Of Dan Seibel
Sent: Monday, November 09, 2015 10:51 AM
To: mohamed.boucadair@orange.com; dhcwg@ietf.org
Subject: Re: [dhcwg] DHCP Options for Network-Assisted Multipath TCP (MPTCP)

I think your document gives a good overall impression of how this will work (having no experience with MPTCP implementations I found this fairly easy to follow).

A few questions:

- in sections 4.2 you mention a client requests this option, but does it have to?  I.e could a server send this option without the client requesting it, and the client would still accept it? (should there be a MUST or SHOULD statement in there?)

- similarly, in section 5 I don¹t see any mention of if the server needs to see a request for this option to hand it out.





On 2015-11-05, 8:19 AM, "dhcwg on behalf of mohamed.boucadair@orange.com";
<dhcwg-bounces@ietf.org on behalf of mohamed.boucadair@orange.com>; wrote:

>Dear all,
>
>Comments are more than welcome.
>
>Cheers,
>Med
>
>> -----Message d'origine-----
>> De : internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] 
>> Envoyé : jeudi 5 novembre 2015 16:19 À : BOUCADAIR Mohamed IMT/OLN; 
>> Tirumaleswar Reddy; JACQUENET Christian IMT/OLN Objet : New Version 
>> Notification for draft-boucadair-mptcp-dhc-02.txt
>> 
>> 
>> A new version of I-D, draft-boucadair-mptcp-dhc-02.txt has been 
>> successfully submitted by Mohamed Boucadair and posted to the IETF 
>> repository.
>> 
>> Name:		draft-boucadair-mptcp-dhc
>> Revision:	02
>> Title:		DHCP Options for Network-Assisted Multipath TCP (MPTCP)
>> Document date:	2015-11-05
>> Group:		Individual Submission
>> Pages:		11
>> URL:            https://www.ietf.org/internet-drafts/draft-boucadair-
>> mptcp-dhc-02.txt
>> Status:         https://datatracker.ietf.org/doc/draft-boucadair-mptcp-
>> dhc/
>> Htmlized:       https://tools.ietf.org/html/draft-boucadair-mptcp-dhc-02
>> Diff:           https://www.ietf.org/rfcdiff?url2=draft-boucadair-mptcp-
>> dhc-02
>> 
>> Abstract:
>>    One of the promising deployment scenarios for Multipath TCP (MPTCP)
>>    is to enable a Customer Premises Equipment (CPE) that is connected to
>>    multiple networks (e.g., DSL, LTE, WLAN) to optimize the usage of its
>>    network attachments.  Because of the lack of MPTCP support at the
>>    server side, some service providers consider a network-assisted model
>>    that relies upon the activation of a dedicated function called: MPTCP
>>    Concentrator.
>> 
>>    This document focuses on the explicit deployment scheme where the
>>    identity of the MPTCP Concentrator(s) is explicitly configured on
>>    connected hosts.  This document specifies DHCP (IPv4 and IPv6)
>>    options to configure hosts with Multipath TCP (MPTCP) parameters.
>> 
>> 
>> 
>> 
>> 
>> Please note that it may take a couple of minutes from the time of 
>> submission until the htmlized version and diff are available at 
>> tools.ietf.org.
>> 
>> The IETF Secretariat
>
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