Re: [Lsr] [draft-ietf-lsr-flex-algo-08] Clarification on ASLA usage for flex-algo

tony.li@tony.li Mon, 10 August 2020 17:21 UTC

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Cc: Peter Psenak <ppsenak=40cisco.com@dmarc.ietf.org>, Sarah Chen <sarahchen=40arista.com@dmarc.ietf.org>, "lsr@ietf.org" <lsr@ietf.org>, "Van De Velde, Gunter (Nokia - BE/Antwerp)" <gunter.van_de_velde@nokia.com>, "draft-ietf-lsr-flex-algo@ietf.org" <draft-ietf-lsr-flex-algo@ietf.org>
To: Peter Psenak <ppsenak@cisco.com>
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Subject: Re: [Lsr] [draft-ietf-lsr-flex-algo-08] Clarification on ASLA usage for flex-algo
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Hi Peter,

>>>> The flex-algo draft mentions "Min Unidirectional Link Delay as defined in [RFC7810 <https://tools.ietf.org/html/rfc7810>]". When reading RFC7810, I found two Sub-TLVs:
>>>> 4.1. Unidirectional Link Delay Sub-TLV 4.2. Min/Max Unidirectional Link Delay Sub-TLV
>>>> Could you please clarify which one should be used? If "Min/Max Unidirectional Link Delay Sub-TLV" is used, will the max delay carried in the subTLV be ignored?
>>> 
>>> flex-algo as defined in the draft uses "Min Unidirectional Link Delay", which is advertised in the "Min/Max Unidirectional Link Delay Sub-TLV".
>>> 
>>> The fact that the "Min/Max Unidirectional Link Delay Sub-TLV" carries some other data (e.g. Max delay) is orthogonal to the flex-algo usage.
>> Could we please clarify this by adding a reference to the specific section?
> 
> which specific section do you have in mind?



In the flex algo draft, in section 5.1, you current have the text:

	1: Min Unidirectional Link Delay as defined in [RFC7810 <https://tools.ietf.org/html/rfc7810>].

Could you please change that to:

	1: Min Unidirectional Link Delay as defined in [RFC7810 <https://tools.ietf.org/html/rfc7810>] Section 4.2.

Thanks,
Tony