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Re: [mpls] Comment on draft-gandhi-mpls-ioam-sr-05

Rakesh Gandhi <rgandhi.ietf@gmail.com> Thu, 18 February 2021 23:45 UTC

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From: Rakesh Gandhi <rgandhi.ietf@gmail.com>
Date: Thu, 18 Feb 2021 18:45:23 -0500
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To: xiao.min2@zte.com.cn
Cc: Loa Andersson <loa@pi.nu>, mpls <mpls@ietf.org>
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Subject: Re: [mpls] Comment on draft-gandhi-mpls-ioam-sr-05
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Hi Xiao, Loa,
FYI:
I believe the latest revision (06) addresses this comment.
https://datatracker.ietf.org/doc/html/draft-gandhi-mpls-ioam-sr-06

Thanks for your review.
Regards,
Rakesh


On Mon, Jan 18, 2021 at 9:15 AM Rakesh Gandhi <rgandhi.ietf@gmail.com>
wrote:

> Hi Loa, Xiao,
>
> Please see reply inline with <RG>..
>
> On Mon, Jan 18, 2021 at 3:44 AM <xiao.min2@zte.com.cn> wrote:
>
>> Hi Loa,
>>
>> Please see inline my responses with <XM>.
>>
>> Best Regards,
>> Xiao Min
>> 原始邮件
>> *发件人：*LoaAndersson
>> *收件人：*肖敏10093570;
>> *抄送人：*mpls@ietf.org;
>> *日 期 ：*2021年01月18日 16:01
>> *主 题 ：**Re: [mpls] Comment on draft-gandhi-mpls-ioam-sr-05*
>> Xiao,
>>
>> I have not been active in any OAM work, and not in the iOAM development,
>>
>> so I'm on a learning curve. So one more question.
>> <XM> It's my pleasure if I can help here.
>>
>> Inline please
>>
>>
>> On 18/01/2021 10:00, xiao.min2@zte.com.cn wrote:
>> > If I understand this correctly that is what is done by Hop-by-Hop IOAM.
>> > <XM> Per IOAM itself, the Edge-to-Edge IOAM and Hop-by-Hop IOAM are
>> > independent of each other, they use different IOAM Option-Type. Per MPLS
>>
>> > indicator label, I agree with you that Hop-by-Hop IOAM indicator label
>> > can be reused here, but IMHO the current text in this draft is not clear
>>
>> > on it.
>>
>> Let us assume that a packet arrive to an egress node with (1) with an
>> e-2-e iOAM indicator and another packet (2) arrive with the hop-by-hop
>> indicator.
>>
>> Is there a difference t0 what the egress node do to (1) and what it does
>>
>> to (2)?
>> <XM> As I understand it, there is no difference. Here the only function
>> of iOAM indicator is for the egress node to know there exists IOAM header
>> below the MPLS label stack, and how to process the IOAM data fields within
>> the IOAM header depends on IOAM Option-Type.
>>
>
> <RG> Yes, this is my understanding as well.
>
> Thanks,
> Rakesh
>
>
>
>>
>>
>> /Loa
>>
>> --
>>
>> Loa Andersson                        email: loa@pi.nu
>> Senior MPLS Expert                          loa.pi.nu@gmail.com
>> Bronze Dragon Consulting             phone: +46 739 81 21 64
>>
>>
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>

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