Re: [spring] [EXTERNAL] Re: A technical concern regarding draft-schmutzer-spring-cs-sr-policy-00

[Alexander Vainshtein <[e-mail]>]

Robert,
The default and CS topologies would each advertise their own resource-aware Node and Adj-SIDs, and these SID’s would be resource-aware with strictly separated resources.
Physical links would be shared, but “soft” resources (queues, buffers etc.) would not.


Regards,
Sasha

From: Robert Raszuk <[e-mail]>
Sent: Thursday, June 15, 2023 6:34 PM
To: Alexander Vainshtein <[e-mail]>
Cc: Christian Schmutzer (cschmutz) <[e-mail]>; [e-mail]; Dongjie (Jimmy) <[e-mail]>; Stewart Bryant <[e-mail]>
Subject: Re: [EXTERNAL] Re: [spring] A technical concern regarding draft-schmutzer-spring-cs-sr-policy-00

Hi,

I have probably did not say it explicitly, but the default topology would use its own resources – and experience its own problems, strictly orthogonal to whatever happens in the dedicated CS topology.
IMHO and FWIW this could be treated as a possible approach for implementing the (in)famous “network slicing”.

Isn't the default topo an underlay for any custom topology ? You seems to think that default topology can function "in parallel", but this is not how I understand it.

As for “circuit switching over connectionless paradigm” – well, TDM circuit emulation has been standardized by the IETF years ago, has been quite widely deployed, and, AFAIK, is still growing as more operators try to scrap their SDH networks.

Yeh happened to be for a number of years on a customer side using such an "invention" and my resistance to the subject draft is coming from this (bad) experience.

Sure it is cool for operators ... not so for customers.

I even wrote a draft one time trying to detect the hidden problems by such innovations:

https://www.ietf.org/archive/id/draft-turaga-mpls-test-labels-01.txt<https://clicktime.symantec.com/15siFAWXYQbeXVKrxySKo?h=x62Izj8EA1ochFQn_IOjg5vppMp6uauU1mfZg75quk4=&u=https://www.ietf.org/archive/id/draft-turaga-mpls-test-labels-01.txt>

Thx,
R.

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