Re: [Detnet] Transport sub-layer name change (Was Re: Tsvart last call review of draft-ietf-detnet-architecture-08)

[János Farkas <[e-mail]>]

Hi,

I have a similar concern with the change. It of course depends on the 
definition of Traffic Engineering, but the term "DetNet TE sub-layer" 
may imply to the reader that Traffic Engineering is a must even for 
DetNet transit nodes. As far as I recall, the intention is to make 
possible that DetNet transit nodes can be kept simple. Depending on the 
actual DetNet service provided, DetNet transit nodes can be actually simple.

The idea behind the introduction of the two DetNet sub-layers was to 
make it easier to tackle the problem. The lower layer provides simpler 
packet forwarding related functions, the higher DetNet Service sub-layer 
provides more complex DetNet service related functions.

In order to have another alternative on the table I propose renaming 
"DetNet Transport sub-layer" to "DetNet Forwarding sub-layer"

Best regards,
Janos


On 11/20/2018 10:10 PM, Lou Berger wrote:
>
> On 11/20/2018 3:11 PM, Andrew G. Malis wrote:
>> This terminology is certainly appropriate for TEAS. For DetNet, this 
>> seems to make the assertion that the DetNet underlay is always 
>> traffic-engineered, even if IPv4 or IPv6 (which is certainly possible 
>> using TE extensions for the IGPs).
>
> This is certainly a fair point and one that does lead me to have a 
> slight reservation about the change, that said, it seems the benefit 
> out ways the downsides.
>
>>
>> As long as people are OK with this assertion, then I'm OK with it as 
>> well. That should be made clear in the architecture spec where the 
>> term "DetNet TE sub-layer" is introduced/defined.
>
> agreed.
>
> Lou
>
>>
>> Cheers,
>> Andy
>>
>> On Tue, Nov 20, 2018 at 1:29 PM Grossman, Ethan A. <[e-mail] 
>> <mailto:[e-mail]>> wrote:
>>
>>     I like it.
>>     Ethan.
>>
>>     -----Original Message-----
>>     From: Pascal Thubert (pthubert) <[e-mail]
>>     <mailto:[e-mail]>>
>>     Sent: Tuesday, November 20, 2018 10:27 AM
>>     To: Lou Berger <[e-mail] <mailto:[e-mail]>>;
>>     Scharf, Michael <[e-mail]
>>     <mailto:[e-mail]>>
>>     Cc: [e-mail] <mailto:[e-mail]>;
>>     [e-mail]
>>     <mailto:[e-mail]>
>>     Subject: RE: Transport sub-layer name change (Was Re: [Detnet]
>>     Tsvart last call review of draft-ietf-detnet-architecture-08)
>>
>>     I support this change;
>>
>>     Pascal
>>
>>     > -----Original Message-----
>>     > From: Lou Berger <[e-mail] <mailto:[e-mail]>>
>>     > Sent: mardi 20 novembre 2018 19:19
>>     > To: Pascal Thubert (pthubert) <[e-mail]
>>     <mailto:[e-mail]>>; Scharf, Michael
>>     > <[e-mail]
>>     <mailto:[e-mail]>>
>>     > Cc: [e-mail] <mailto:[e-mail]>;
>>     [e-mail]
>>     <mailto:[e-mail]>
>>     > Subject: Transport sub-layer name change (Was Re: [Detnet]
>>     Tsvart last
>>     > call review of draft-ietf-detnet-architecture-08)
>>     >
>>     > ALL,
>>     >
>>     > There is a desire to replace the word "Transport" from the DetNet
>>     > Transport sub-layer to avoid confusion with L$ Transport 
>> protocols.
>>     >
>>     > In the TEAS WG we had a similar discussion and we replaced
>>     "Transport"
>>     > with "Traffic Engineered (TE) ".
>>     >
>>     > While a bit more verbose, what do people think about this change?
>>     >
>>     > To be clear, the suggestion is:
>>     >
>>     > OLD
>>     >
>>     >                     .
>>     >                     .
>>     >       +----------------------------+
>>     >       |  DetNet Service sub-layer  | PW, UDP, GRE
>>     >       +----------------------------+
>>     >       | DetNet Transport sub-layer | IPv6, IPv4, MPLS TE LSPs,
>>     MPLS SR
>>     >       +----------------------------+
>>     >                     .
>>     >                     .
>>     >
>>     >                   Figure 4: DetNet adaptation to data plane
>>     >
>>     > NEW
>>     >
>>     >                     .
>>     >                     .
>>     >       +----------------------------+
>>     >       |  DetNet Service sub-layer  | PW, UDP, GRE
>>     >       +----------------------------+
>>     >       |      DetNet TE sub-layer   | IPv6, IPv4, MPLS TE LSPs,
>>     MPLS SR
>>     >       +----------------------------+
>>     >                     .
>>     >                     .
>>     >
>>     >                   Figure 4: DetNet adaptation to data plane
>>     >
>>     > Lou
>>
>
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