Re: [tsvwg] Comment on draft-bryant-rtgwg-enhanced-vpn

Stewart Bryant <stewart.bryant@gmail.com> Mon, 26 March 2018 15:00 UTC

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To: Ruediger.Geib@telekom.de
Cc: tsvwg@ietf.org, "Dongjie (Jimmy)" <jie.dong@huawei.com>
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From: Stewart Bryant <stewart.bryant@gmail.com>
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Date: Mon, 26 Mar 2018 16:00:15 +0100
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Subject: Re: [tsvwg] Comment on draft-bryant-rtgwg-enhanced-vpn
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Hi Ruediger

We will look into introducing text on this when we update the draft.

Thanks for the input.

- Stewart

On 22/03/2018 15:16, Ruediger.Geib@telekom.de wrote:
>
> Hi Stewart,
>
> I didn’t read the draft. If I got your presentation at the rtgwg 
> right, draft-bryant-rtgwg-enhanced-vpn or vpn+ suggests to link 
> bandwidth to dedicated network resources. RFC 3270 introduced the 
> concept of L-LSPs.
>
> “1.3 Label-Only-Inferred- PHB Scheduling Class LSPs (L-LSP)
>
>    A separate LSP can be established for a single <FEC, Ordered 
> Aggregate> pair.  With
>
>    such LSPs, the PHB Scheduling Class is explicitly signaled at the 
> time of label
>
>    establishment, so that after label establishment, the LSR can infer
>
>    exclusively from the label value the PHB Scheduling Class to be 
> applied to a labeled
>
>    packet …..”
>
> While vpn+ might not be exactly the same, I still think the concepts 
> are closely related. I’d appreciate the proper vpn+ related draft(s) 
> to include a discussion on the similarities and the differences of 
> vpn+ as compared to the concept of L-LSPs as introduced by RFC3270. 
> And a reference to the latter, of course.
>
> As far as I can tell, the concept of linking dedicated resources 
> linked to SID values isn’t discussed by Spring for the time being. I 
> however may not be aware of all Spring related drafts and I’m happy if 
> you can provide a reference to a draft suggesting this.
>
> Regards,
>
> Ruediger
>