Re: [sfc] TR: I-D Action: draft-boucadair-sfc-oam-packet-00.txt

[[e-mail]]

Re-,

This is determined by the entity that issues the OAM packet. This is typically a dedicated OAM controller or an SFC element (classifier for the ioam case, for example).


BTW, I updated the draft to reflect your comments and also those from Jim: https://www.ietf.org/rfcdiff?url2=draft-boucadair-sfc-oam-packet-01

Cheers,
Med

De : Greg Mirsky <[e-mail]>
Envoyé : mercredi 16 février 2022 16:52
À : BOUCADAIR Mohamed INNOV/NET <[e-mail]>
Cc : [e-mail]
Objet : Re: [sfc] TR: I-D Action: draft-boucadair-sfc-oam-packet-00.txt

Hi Med,
thank you for your expedient response. I have a follow-up question:
How does one determine the nature, OAM or not-OAM, of data elements in the NSH Context header?
As I understand it, draft-ietf-sfc-nsh-tlv does not provide that. Do we need to add it? Appreciate your thoughts on that.

Regards,
Greg

On Wed, Feb 16, 2022 at 7:30 AM <[e-mail]<mailto:[e-mail]>> wrote:
Hi Greg,

Please see inline.

Cheers,
Med

De : Greg Mirsky <[e-mail]<mailto:[e-mail]>>
Envoyé : mercredi 16 février 2022 16:13
À : BOUCADAIR Mohamed INNOV/NET <[e-mail]<mailto:[e-mail]>>
Cc : [e-mail]<mailto:[e-mail]>
Objet : Re: [sfc] TR: I-D Action: draft-boucadair-sfc-oam-packet-00.txt

Hi Med,
many thanks for taking the lead and putting the proposal on the table.
I have a question on the proposed new text for the O bit and its possible effect on IOAM:
   O bit:  Setting this bit indicates an SFC OAM packet.  Such a packet
      is any NSH-encapasulated packet that exclusively includes an OAM
      command and/or OAM data.
My understanding of the new definition of the O bit is that the NSH includes and/or encapsulates only OAM command and/or data. IOAM, as I understand its application in NSH, may follow the NSH and have user payload after the IOAM data.

[Med] Packets that include also user data are not considered as “OAM packets” as per the new definition.

And another scenario, if Flow ID TLV is used to influence user data through SFP, OAM will apply the same Flow ID value. Would such packet still be considered as "exclusively includes OAM command and/or data"?

[Med] Yes, they are. Flow id is just a constraint, if you will, that is used to influence how OAM commands will be executed.

Regards,
Greg

On Wed, Feb 16, 2022 at 6:40 AM <[e-mail]<mailto:[e-mail]>> wrote:
Hi all,

A proposal to clarify the intent of SFC OAM packet. Comments are welcome.

Cheers,
Med

-----Message d'origine-----
De : I-D-Announce <[e-mail]<mailto:[e-mail]>> De la part de [e-mail]<mailto:[e-mail]>
Envoyé : mercredi 16 février 2022 15:38
À : [e-mail]<mailto:[e-mail]>
Objet : I-D Action: draft-boucadair-sfc-oam-packet-00.txt


A New Internet-Draft is available from the on-line Internet-Drafts directories.


        Title           : Clarifying Ambiguity related to Network Service Header (NSH) OAM Packet
        Author          : Mohamed Boucadair
        Filename        : draft-boucadair-sfc-oam-packet-00.txt
        Pages           : 5
        Date            : 2022-02-16

Abstract:
   This document clarifies an ambiguity in the Network Service Header
   (NSH) specification related to the handling of O-bit.  In particular,
   this document clarifies the meaning of "OAM packet".

   This document updates RFC8300.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-boucadair-sfc-oam-packet/

There is also an htmlized version available at:
https://datatracker.ietf.org/doc/html/draft-boucadair-sfc-oam-packet-00


Internet-Drafts are also available by rsync at rsync.ietf.org::internet-drafts


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