Re: [Idr] Regarding draft-vandevelde-idr-flowspec-path-redirect//答复: IDR interim (10/26/2015) 10:00am - 11:30am ET update

["VAN DE VELDE, Gunter (Gunter)" <[e-mail]>]

Hi Robin,

Thanks for your note.

A tunnel is not always going over shortest path. Some tunnels are TE tunnels and are deliberately not going over a shortest path. This is something that draft-rosen-idr-tunnel-encaps-00 will not help to signal because the tunnel-encap attribute indicates tunnel parameters used by the tail-end.

If a redirect tunnel represents a particular redirect/steering service (better delay, less packet loss, non-SRLG, more BW, etc…) then it does become rather complex for BGP as signalling technology because a tunnel relationship is a unique between 'a headend' and ‘a tailed' device. It seems better to leave tunnel-setup to dedicated tunnel-setup mechanisms like PCEP, SR, etc….

The draft redirect-to-PATH_ID is providing the means to signal a flow-based redirect/steering service, and have each recipient router identify using local recursion for the PATH_IDs the corresponding tunnels/redirect-info. This allows for tunnel setup complexity to be taken away from BGP, while at the same time BGP is doing what it is very good at doing: "It signals a policy” in reliable fashion.

Kind Regards,
G/



From:  Idr <[e-mail]<mailto:[e-mail]>> on behalf of Lizhenbin <[e-mail]<mailto:[e-mail]>>
Date: Monday 26 October 2015 at 16:51
To: Susan Hares <[e-mail]<mailto:[e-mail]>>, "[e-mail]<mailto:[e-mail]>" <[e-mail]<mailto:[e-mail]>>
Cc: "[e-mail]<mailto:[e-mail]>" <[e-mail]<mailto:[e-mail]>>
Subject: [Idr] Regarding draft-vandevelde-idr-flowspec-path-redirect//答复: IDR interim (10/26/2015) 10:00am - 11:30am ET update

Hi Gunter,
Regarding your presentation, I have following comments:
Do you mean draft-hao-idr-flowspec-redirect-tunnel is to signal tunnel setup info? draft-hao-idr-flowspec-redirect-tunnel is to steer traffic to the tunnel instead of signal tunnel setup.
I am not sure if the reuse of draft-rosen-idr-tunnel-encaps-00 in the draft make you confused? We just hope to  just reuses the attributes of to specify the tunnel type to help steering
the traffic to tunnel. If this is not a good way, maybe we can define new attributes.


Best Regards,
Robin





发件人: Idr [mailto:[e-mail]] 代表 Susan Hares
发送时间: 2015年10月25日 22:07
收件人: [e-mail]<mailto:[e-mail]>
抄送: [e-mail]<mailto:[e-mail]>
主题: [Idr] IDR interim (10/26/2015) 10:00am - 11:30am ET update

IDR WG members:

Below is an updated agenda for the IDR interim on 10/26/2015.

Sue

------------
IDR interim October 26, 2015
10:00 - 11:30am

1. Chair's slides [10:00-10:05]

1. draft-litkowski-idr-flowspec-interfaceset-01.txt
   speaker: Stephane Litowski
   Time: 10:05-10:15
   https://datatracker.ietf.org/doc/draft-litkowski-idr-flowspec-interfaceset/

2. draft-hao-idr-flowspec-redirect-tunnel-00
   Speaker: Weiguo Hao
   Time: 10:15 - 10:25
   http://datatracker.ietf.org/doc/draft-hao-idr-flowspec-redirect-tunnel/


3. draft-vandevelde-idr-flowspec-path-redirect
   Speaker: Gunter Van De Velde
   Time: 10:25- 10:35
   http://datatracker.ietf.org/doc/draft-vandevelde-idr-flowspec-path-redirect/


4. Draft Name: draft-hao-idr-flowspec-nvo3-02
   Speaker: Weiguo Hao
   Duration: 10:35-10:40
   http://datatracker.ietf.org/doc/draft-hao-idr-flowspec-nvo3/


5. draft-liang-idr-bgp-flowspec-label-01.txt.
   Speaker:
   Duration: 10:40-10:45
  http://datatracker.ietf.org/doc/draft-liang-idr-bgp-flowspec-label/

6. draft-liang-idr-bgp-flowspec-time
   presenter: Jianjie You
   time: 10:45-10:55
   http://datatracker.ietf.org/doc/draft-liang-idr-bgp-flowspec-time/

7. Draft Name: draft-li-idr-mpls-path-programming-02
   Speaker: Zhenbin Li
   Duration: 10:55-11:05
   http://datatracker.ietf.org/doc/draft-li-idr-mpls-path-programming/

7. Draft Name: draft-li-idr-flowspec-rpd-01
   Speaker: Shunwan Zhuang
   Duration: 11:05 - 11:15
   http://datatracker.ietf.org/doc/draft-li-idr-flowspec-rpd/

8.  Discussion of Flowspec drafts
    11:15 - 11:30am

 Meeting Web-ex information
 Monday, October 26, 2015
10:00 am  |  Eastern Daylight Time (New York, GMT-04:00)  |  2 hrs

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Meeting password:         flow.in.nets


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