Re: [Idr] Mail regarding draft-ietf-idr-segment-routing-te-policy

"Susan Hares" <> Tue, 30 April 2019 17:00 UTC

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From: Susan Hares <>
To: 'Chaitanya Varma' <>,
Cc: 'Gurusiddesh Nidasesi' <>
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Date: Tue, 30 Apr 2019 13:00:17 -0400
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Subject: Re: [Idr] Mail regarding draft-ietf-idr-segment-routing-te-policy
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Stefano, Clarence, Dhanendra, Paul Eric, and Steve: 


I would appreciate if you would take time to answer this query. 


Thank you – Sue 


From: Idr [] On Behalf Of Chaitanya Varma
Sent: Tuesday, April 30, 2019 4:04 AM
Cc: Gurusiddesh Nidasesi
Subject: [Idr] Mail regarding draft-ietf-idr-segment-routing-te-policy




I have couple of queries from the below draft.


  “ Typically, a controller defines the set of policies and advertise

   them to policy head-end routers (typically ingress routers).” 


How do we communicate SR policies from controller? Is it through BGP-SR session or PCEP session.

a. If it is through PCEP session what happens if the PCC is non-headend? 

b. If it is through BGP-SR what is the role for PCEP between PCE and PCC?

  “ Moreover, one or more route-target SHOULD be attached to the


How Route-target should be attached to a SR-NLRI update? 

Is it done through local configuration or picked up based on some dynamic parameter?


Appreciate if you can help here.