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[mpls] Re: Poll: IOAM and PSD

Joel Halpern <jmh@joelhalpern.com> Sat, 03 August 2024 18:28 UTC

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Date: Sat, 03 Aug 2024 14:28:24 -0400
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To: Michael Menth <michael.menth@uni-tuebingen.de>, mpls@ietf.org
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Subject: [mpls] Re: Poll: IOAM and PSD
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Michael, did you evaluate direct export as an alternative?  That does 
not requite mutable data in the stack. And has other benefits in terms 
of packet size.

Yours,

Joel

On 8/3/2024 9:08 AM, Michael Menth wrote:
>
> Hi all,
>
> we're not operators but researchers who implemented some IOAM flavors 
> in combination with SR using P4 on Tofino. We've presented some result 
> at an interim meeting before:
> https://datatracker.ietf.org/meeting/interim-2024-mpls-01/session/mpls
>
> IOAM requires mutable data. In combination with multiple labels, e.g., 
> for SR, these mutable data need to be near the bottom of the stack, 
> otherwise they get popped along the way. Moving them to PSD makes 
> encoding more efficient without increasing the effective header length 
> that needs  to be parsed. Therefore, we think PSD is the better option 
> for applications like IOAM.
>
> Regards
>
> Michael
>
> Am 30.07.2024 um 17:25 schrieb Tony Li:
>>
>> [WG chair hat: on]
>>
>> Hi all,
>>
>> We’ve had many discussions about IOAM and PSD over the last few 
>> years. We need to reach consensus on the problems that need to be 
>> addressed in these areas. Therefore, we would like to hear from 
>> everyone, especially independent operators:
>>
>> 1.
>>
>>     There are many flavors of IOAM.  Which ones would you like to
>>     deploy/implement with MNA?
>>
>> 2.
>>
>>     Do you have other applications of MNA that have not been proposed
>>     yet?
>>
>>  This poll will close in two weeks, at 9am PDT, Aug 13.
>>
>> Regards,
>>
>> MPLS chairs
>>
>>
>> _______________________________________________
>> mpls mailing list --mpls@ietf.org
>> To unsubscribe send an email tompls-leave@ietf.org
> -- 
> Prof. Dr. habil. Michael Menth
> University of Tuebingen
> Faculty of Science
> Department of Computer Science
> Chair of Communication Networks
> Sand 13, 72076 Tuebingen, Germany
> phone: (+49)-7071/29-70505
> mailto:menth@uni-tuebingen.de
> http://kn.cs.uni-tuebingen.de
>
> _______________________________________________
> mpls mailing list --mpls@ietf.org
> To unsubscribe send an email tompls-leave@ietf.org

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