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Re: [spring] Query : draft-filsfils-spring-net-pgm-extension-srv6-usid-12

"Pablo Camarillo (pcamaril)" <pcamaril@cisco.com> Tue, 12 April 2022 17:11 UTC

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From: "Pablo Camarillo (pcamaril)" <pcamaril@cisco.com>
To: Salih K A <salih@juniper.net>, SPRING WG <spring@ietf.org>
CC: "Darren Dukes (ddukes)" <ddukes=40cisco.com@dmarc.ietf.org>
Thread-Topic: Query : draft-filsfils-spring-net-pgm-extension-srv6-usid-12
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Date: Tue, 12 Apr 2022 17:10:38 +0000
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Subject: Re: [spring] Query : draft-filsfils-spring-net-pgm-extension-srv6-usid-12
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Salih,

Inline with PC.

Cheers,
Pablo.


From: Salih K A <salih@juniper.net>
Sent: jueves, 7 de abril de 2022 9:21
To: SPRING WG <spring@ietf.org>
Cc: Darren Dukes (ddukes) <ddukes=40cisco.com@dmarc.ietf.org>; Pablo Camarillo (pcamaril) <pcamaril@cisco.com>
Subject: Query : draft-filsfils-spring-net-pgm-extension-srv6-usid-12

Can you please clarify whether Function Length (FL) will be 0 or 16 for the below uN use-case ?
[PC] FL=0 as explained later

>> Assume we have a uN advertised from Node N
   *  Value = 2001:db8:0:0N00::

   *  Behavior = uN

   *  Structure =

      -  LBL = 48

      -  LNL = 16

      -  FL = 0

      -  AL = 64

Now say we need 2 flavors for that uN; one with just USD flavor and another with just USP flavor.

Will that be 2001:db8:0:0N00:0000::/80 for USD and 2001:db8:0:0N00:0001::/80 for USP? In these 2 SID advertisements the FL will be 16?
or do we need separate uN from same node for different flavors (all with implicit :0000::) with FL 0?
[PC] The latter, separate uN with FL=0. Although in practice you will only have a single uN per algo supported by the node, with the combination of flavors that is supported on that device.




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