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Re: [Detnet-dp-dt] a quick look at the replication/discarding case for detnet flows

Loa Andersson <loa@pi.nu> Wed, 18 January 2017 01:55 UTC

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To: Norman Finn <nfinn@alumni.caltech.edu>
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From: Loa Andersson <loa@pi.nu>
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Date: Wed, 18 Jan 2017 09:55:10 +0800
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Subject: Re: [Detnet-dp-dt] a quick look at the replication/discarding case for detnet flows
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On 2017-01-17 22:41, Norman Finn wrote:
> Thanks for the slides!
>
> Question: You don’t introduce the cross-connect with intermediate packet deletion until slide 9.  Is there any reason you could not add the cross-connect to slide 5,

No other reason than I wanted to take one step at the time.

  You could have PW5 (B to C) and PW6 (C to B).  B would discard 
duplicates between PW1 and PW6, outputting the remaining packets on PW2.

Sure, but I thought that just one case (PW5 B to C) would be enough, 
replication at B and discarding at C, wouldn't that be the same as
(PW6 C to B replication at C and discarding at B?
>
> I assume that you didn’t put this idea in the slides, because you’re assuming that the two streams have to have the same PW label in order for you to discard duplicates.
Well the PW label (d-pw) will be the same everywhere for a detnet PW 
starting at A.
I’m assuming that you can direct two PW labels to a single state 
machine.  Is that necessarily a problem?

Don't get the question? You can direct as many PW labels as you want 
(within reason) th the same machine. I don't see the problem.

/Loa
>
> — Norm
>
>> On Jan 13, 2017, at 23:28, Loa Andersson <loa@pi.nu> wrote:
>>
>> Folks,
>>
>> I took a quick look at the replication / discarding case we talked about at the meeting this week.
>>
>> Please remember that so far this is not a proposal, just a demonstration
>> that there is at least one way of doing it.
>>
>> What is there can bee revised, improved, changed or discarded if we
>> find something better. Take a look a send comments.
>>
>> /loa
>>
>> Warning: I have a grave case of dyslexia, so any odd or inventive
>> spelling is pure accident.
>> --
>>
>>
>> Loa Andersson                        email: loa@mail01.huawei.com
>> Senior MPLS Expert                          loa@pi.nu
>> Huawei Technologies (consultant)     phone: +46 739 81 21 64
>> <detnet-replication.pptx>_______________________________________________
>> Detnet-dp-dt mailing list
>> Detnet-dp-dt@ietf.org
>> https://www.ietf.org/mailman/listinfo/detnet-dp-dt
>

-- 


Loa Andersson                        email: loa@mail01.huawei.com
Senior MPLS Expert                          loa@pi.nu
Huawei Technologies (consultant)     phone: +46 739 81 21 64

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