[DMM] 6.6. T.M.GTP4.D description (Re: I-D Action: draft-ietf-dmm-srv6-mobile-uplane-05.txt

"Kentaro Ebisawa" <ebiken.g@gmail.com> Mon, 08 July 2019 13:36 UTC

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From: "Kentaro Ebisawa" <ebiken.g@gmail.com>
To: dmm@ietf.org
Date: Mon, 08 Jul 2019 13:36:35 +0000
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Subject: [DMM] 6.6. T.M.GTP4.D description (Re: I-D Action: draft-ietf-dmm-srv6-mobile-uplane-05.txt
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Hi,

Thank you for updating the draft. Nice to see T.M.Tmap was renamed to 
T.M.GTP4.D corresponding to End.M.GTP4.E. :)

Some feedback about the updated description.

 > 6.6. T.M.GTP4.D
 > ...
 > The prefix of B’ SHOULD be an End.M.GTP4.E SID with its format
 > instantiated at an SR gateway with the IPv4 SA of the receiving
 > packet.

"The B’" is IPv6 SA so I think this should correspond to S' in 
End.M.GTP4.E rather than to SID.
So it might be more clear to depict the packet format (diagram) again 
and mention B' has the following format with the IPv4 SA of the 
receiving packet.

0                                                         127
+----------------------+--------+--------------------------+
| Source UPF Prefix    |IPv4 SA | any bit pattern(ignored) |
+----------------------+--------+--------------------------+
        128-a-b             a                 b

--
Kentaro Ebisawa <ebiken.g@gmail.com>

------ Original Message ------
From: internet-drafts@ietf.org
To: i-d-announce@ietf.org
Cc: dmm@ietf.org
Sent: 2019/07/08 21:16:07
Subject: [DMM] I-D Action: draft-ietf-dmm-srv6-mobile-uplane-05.txt

>
>A New Internet-Draft is available from the on-line Internet-Drafts 
>directories.
>This draft is a work item of the Distributed Mobility Management WG of 
>the IETF.
>
>        Title           : Segment Routing IPv6 for Mobile User Plane
>        Authors         : Satoru Matsushima
>                          Clarence Filsfils
>                          Miya Kohno
>                          Pablo Camarillo
>                          Daniel Voyer
>                          Charles E. Perkins
>	Filename        : draft-ietf-dmm-srv6-mobile-uplane-05.txt
>	Pages           : 28
>	Date            : 2019-07-08
>
>Abstract:
>   This document shows the applicability of SRv6 (Segment Routing IPv6)
>   to the user-plane of mobile networks.  The network programming nature
>   of SRv6 accomplish mobile user-plane functions in a simple manner.
>   The statelessness of SRv6 and its ability to control both service
>   layer path and underlying transport can be beneficial to the mobile
>   user-plane, providing flexibility, end-to-end network slicing and SLA
>   control for various applications.  This document describes the SRv6
>   mobile user plane behavior and defines the SID functions for that.
>
>
>The IETF datatracker status page for this draft is:
>https://datatracker.ietf.org/doc/draft-ietf-dmm-srv6-mobile-uplane/
>
>There are also htmlized versions available at:
>https://tools.ietf.org/html/draft-ietf-dmm-srv6-mobile-uplane-05
>https://datatracker.ietf.org/doc/html/draft-ietf-dmm-srv6-mobile-uplane-05
>
>A diff from the previous version is available at:
>https://www.ietf.org/rfcdiff?url2=draft-ietf-dmm-srv6-mobile-uplane-05
>
>
>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.
>
>Internet-Drafts are also available by anonymous FTP at:
>ftp://ftp.ietf.org/internet-drafts/
>
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