Re: [spring] 答复: IPv6+??

"UTTARO, JAMES" <> Mon, 06 July 2020 17:05 UTC

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From: "UTTARO, JAMES" <>
To: Lizhenbin <>, Mark Smith <>
CC: SPRING WG <>, Andrew Alston <>
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              The draft calls out the benefits of SRV6 vs SR/MPLS as the authors see it.  That is fine and is a data point for those considering SRV6 instead of SR/MPLS.  So I guess I am confused as to what we are talking about. If IPV6+ is different and new I would suggest crafting a requirements document similar to what we did for EVPN. See attached..

              Jim Uttaro

From: Lizhenbin <>
Sent: Saturday, July 04, 2020 8:09 AM
To: UTTARO, JAMES <>om>; Mark Smith <>
Cc: SPRING WG <>rg>; Andrew Alston <>
Subject: 答复: [spring] 答复: IPv6+??

Hi Jim,

I respect the comment from the chair. I propose the following draft (because it is SRv6 work) for your reference on the requirements.<>


Later there may be more information when update.

Best Regards,

发送时间: 2020年7月4日 18:51
收件人: Mark Smith; Lizhenbin
抄送: SPRING WG; Andrew Alston
主题: RE: [spring] 答复: IPv6+??
Where are the requirements.. I mean actual ones..

              Jim Uttaro

From: spring <<>> On Behalf Of Mark Smith
Sent: Saturday, July 04, 2020 6:40 AM
To: Lizhenbin <<>>
Cc: SPRING WG <<>>; Andrew Alston <<>>
Subject: Re: [spring] 答复: IPv6+??

Where are the IPv6+ Internet Drafts?

On Sat, 4 Jul 2020, 18:08 Lizhenbin, <<>> wrote:

Hi Andrew,

Thanks for your paying attention to the website. Please refer to my clarification.

a. SRv6 is the technology based on IPv6. In the past 20+ years IPv6 has being deployed. One of the most important drives is the address space. The development of 5G and cloud proposes the new chances for the development and deployment of IPv6. Depending on the native IP reacheability and providing rich attributes based on the IPv6 extension headers, IPv6 can provide flexible connectivity to satisfy the requirements of 5G and cloud. SRv6 is the typical representative solutions. This makes this round of IPv6-based innovations and deployments shows the new characteristics of the times to some extent. Then IPv6+ concept is proposed.  It means the solutions is based on IPv6 and used for the scenarios of 5G and cloud.

b. IPv6+  has nothing with the New IP. It is apparent that the solutions proposed in the IPv6+ are based on the IPv6 and all the standardization work is being done in IETF and has nothing with ITU-T.

I am not sure if it is appropriate to discuss this work in the mailing list of SPRING WG.  More questions and comments can be sent to<>.

Best Regards,


发件人: spring [<>] 代表 Andrew Alston [<>]
发送时间: 2020年7月4日 1:31
主题: [spring] IPv6+??
Hi All,

I came across this website:<>

Now, I wish to clarify a few things.

  1.  This website seems to imply – strong – that Srv6 is not infact IPv6 – but rather IPv6+ - is this the position of the member of this working group or is this simply someones bizarre idea?


  1.  This site seems heavily related to the new ip stuff that was presented to the ITU – does anyone here know if there is any actual relation between this and that crowd?



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