Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn

Hi WG,

I reviewed the draft, and support the adoption. The proposal may be a
useful improvement of SR architecture, and it will be valuable to consider
it.

The follows are my comments:
- Regarding scalability, it will depend on how to design configurations,
and I think that there is little difference between existing technologies
and the proposal.  The number of virtual networks which can be built will
strongly depend on the spec/ability of the underlay network.  For example,
the number of available QoS classes is limited by the number of queues
which routers have. Or the size of a forwarding table depends on
performance of TCAM. I think a critical point on scalability is underlay
network spec/ability rather than the nature of techniques/protocols.
- Simplifying data plane structure and its management by unifying several
forwarding mechanisms to SID may be one of advantages of the proposal.
- This extension may be a fundamental improvement, and it may not be
necessary to be tied to usage for enhanced VPN solution.

Regards,

Shunsuke

On Wed, Jul 29, 2020 at 12:48 AM Greg Mirsky <gregimirsky@gmail.com> wrote:

> Dear Authors,
> thank you for that well-written document. It was a pleasure to read. I
> have a number of questions and much appreciate it if you can clarify them
> for me:
>
>    - how you envision mapping resources to a topological SID, e.g.
>    adj-SID? Would it be 1:1, i..e., a new SID for each resource that
>    characterizes a link in a virtual network?
>    - how granular association of a resource with a SID could practically
>    be? For example, BW may be de-composed into, per. RFC 6003, CIR, CBS, EIR,
>    and EBS. Do you expect a transient SR node to do policing and/or shaping
>    according to such resource information?
>    - I agree, that FlexE is one of Layer 2 technologies to provide
>    predictable, in regard to performance, transport. What benefits of using
>    resource information you see for FlexE? Would an intermediate node manage
>    the FlexE calendar?
>
> Regards,
> Greg
>
> On Wed, Jul 15, 2020 at 4:17 AM James Guichard <
> james.n.guichard@futurewei.com> wrote:
>
>> Dear WG:
>>
>>
>>
>> This email begins a 2 week WG adoption call for
>> https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/
>> ending Wednesday 29th July 2020.
>>
>>
>>
>> Please speak up if you support or oppose adopting this document into the
>> WG. Please also provide comments/reasons for that support (or lack
>> thereof). Silence will not be considered consent.
>>
>>
>>
>> Thanks!
>>
>>
>>
>> Jim, Joel & Bruno
>>
>>
>>
>>
>>
>>
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>> https://www.ietf.org/mailman/listinfo/spring
>>
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