Hi Tony,

You are correct in that a prefix can only be associated with one Flexalgo.

I will add some text about applications in the next version.


Juniper Business Use Only

-----Original Message-----
From: Tony Li <tony1ath...@gmail.com> On Behalf Of tony...@tony.li
Sent: Tuesday, September 29, 2020 10:05 AM
To: Ron Bonica <rbon...@juniper.net>
Cc: lsr@ietf.org
Subject: Re: [Lsr] New Version Notification for 

[External Email. Be cautious of content]


This is nice. It makes it clear that constraint based path computation need not 
have MPLS overhead for those that don’t want it.

One thing that you don’t talk about is how this gets used, tho that may be 
blindingly obvious: you’ll need all nodes placing their prefixes in the 
RIB/FIB, where it will need to be selected over other path computation for the 
same prefixes.  This somewhat precludes the possibility of a given prefix being 
useful in multiple flex-algos.

More text on application would be most welcome, just to ensure that we’re on 
the same page.


> On Sep 29, 2020, at 6:37 AM, Ron Bonica 
> <rbonica=40juniper....@dmarc.ietf.org> wrote:
> Please review and comment
>                                       Ron
> Juniper Business Use Only
>> -----Original Message-----
>> From: internet-dra...@ietf.org <internet-dra...@ietf.org>
>> Sent: Tuesday, September 29, 2020 9:36 AM
>> To: Parag Kaneriya <pkane...@juniper.net>; Shraddha Hegde 
>> <shrad...@juniper.net>; Ron Bonica <rbon...@juniper.net>; Rajesh M 
>> <mraj...@juniper.net>; William Britto A J <bwill...@juniper.net>
>> Subject: New Version Notification for 
>> draft-bonica-lsr-ip-flexalgo-00.txt
>> [External Email. Be cautious of content]
>> A new version of I-D, draft-bonica-lsr-ip-flexalgo-00.txt
>> has been successfully submitted by Ron Bonica and posted to the IETF 
>> repository.
>> Name:           draft-bonica-lsr-ip-flexalgo
>> Revision:       00
>> Title:          IGP Flexible Algorithms (Flexalgo) In IP Networks
>> Document date:  2020-09-29
>> Group:          Individual Submission
>> Pages:          14
>> URL:            
>> https://urldefense.com/v3/__https://www.ietf.org/id/draft-bonica-
>> lsr-ip-flexalgo-00.txt__;!!NEt6yMaO-gk!X7PVDP-
>> FnUA0oCcZMw3Qde6in0C72hu_9hOZ53kPspIarR8fNDyU9Vck80Zbjoij$
>> Status:
>> https://urldefense.com/v3/__https://datatracker.ietf.org/doc/draft-bo
>> nica-lsr-
>> ip-flexalgo/__;!!NEt6yMaO-gk!X7PVDP-
>> FnUA0oCcZMw3Qde6in0C72hu_9hOZ53kPspIarR8fNDyU9Vck8x7e5ZqI$
>> Htmlized:
>> https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/dra
>> ft-
>> bonica-lsr-ip-flexalgo__;!!NEt6yMaO-gk!X7PVDP-
>> FnUA0oCcZMw3Qde6in0C72hu_9hOZ53kPspIarR8fNDyU9Vck82w_6CyU$
>> Htmlized:       
>> https://urldefense.com/v3/__https://tools.ietf.org/html/draft-
>> bonica-lsr-ip-flexalgo-00__;!!NEt6yMaO-gk!X7PVDP-
>> FnUA0oCcZMw3Qde6in0C72hu_9hOZ53kPspIarR8fNDyU9Vck81_QrJ_p$
>> Abstract:
>>   An IGP Flexible Algorithm computes a constraint-based path and maps
>>   that path to an identifier.  As currently defined, Flexalgo can only
>>   map the paths that it computes to Segment Routing (SR) identifiers.
>>   Therefore, Flexalgo cannot be deployed in the absence of SR.
>>   This document extends Flexalgo, so that it can map the paths that it
>>   computes to IP addresses.  This allows Flexalgo to be deployed in any
>>   IP network, even in the absence of SR.
>> Please note that it may take a couple of minutes from the time of 
>> submission until the htmlized version and diff are available at 
>> tools.ietf.org.
>> The IETF Secretariat
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