Re: [Lsr] A question about draft-ietf-lsr-flex-algo

[Huzhibo <[e-mail]>]

Hi Alexander, Peter:

     Thank you very much，After I read the WG alias, I still have a lot of doubts, can we calculate the disjoint path by exclude  SRLG in flexalgo? In fact, unless you previously defined two disjoint planes using SRLG, you cannot guarantee that different FlexAlgo can calculate disjoint paths.

Thanks

Zhibo Hu
From: Alexander Vainshtein [mailto:[e-mail]]
Sent: Wednesday, June 3, 2020 8:19 PM
To: Huzhibo <[e-mail]>; Peter Psenak (ppsenak) <[e-mail]>
Cc: [e-mail]; [e-mail]
Subject: RE: A question about draft-ietf-lsr-flex-algo

Hi Zhibo Hu,
Welcome to the club - I have already asked the same question and got a response from Peter.
You can find the relevant email thread here<https://mailarchive.ietf.org/arch/msg/spring/wvowYz7mOwR9f6je46qPV_pD9pU/>.

My 2c,
Sasha

Office: [phone]
Cell:      [phone]
Email:   [e-mail]<mailto:[e-mail]>

From: Lsr <[e-mail]<mailto:[e-mail]>> On Behalf Of Huzhibo
Sent: Wednesday, June 3, 2020 3:07 PM
To: Peter Psenak (ppsenak) <[e-mail]<mailto:[e-mail]>>
Cc: [e-mail]<mailto:[e-mail]>; [e-mail]<mailto:[e-mail]>
Subject: [Lsr] A question about draft-ietf-lsr-flex-algo

Hi Peter:

I noticed that draft-ietf-lsr-flex-algo-07 adds exclude SRLG TLV. SRLG defines a group of risk-sharing link groups. It is generally used to prevent the primary and standby paths from passing the same risk-sharing link group .I don't know why a group of SRLG links should be excluded from the FlexAlgo calculation. What is its usecase?

Thanks

Zhibo Hu

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