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Re: [Bier] Call for adoption: draft-wijnandsxu-bier-non-mpls-bift-encoding-01

IJsbrand Wijnands <ice@cisco.com> Tue, 27 February 2018 17:59 UTC

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From: IJsbrand Wijnands <ice@cisco.com>
In-Reply-To: <d853e377-20a6-2bff-c959-ca16fcc12fad@juniper.net>
Date: Tue, 27 Feb 2018 18:59:47 +0100
Cc: gjshep@gmail.com, BIER WG <bier@ietf.org>
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To: Eric C Rosen <erosen@juniper.net>
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Subject: Re: [Bier] Call for adoption: draft-wijnandsxu-bier-non-mpls-bift-encoding-01
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Eric,

Maybe a configuration example helps:

Consider the below configuration:

router bier
 encapsulation non-mpls bsl 256
  sub-domain 1
   source loopback 0
   bift-id auto
  !
 !
!

I would think that such configuration is the minimum required on every BIER router (unless there are default that don’t need to be required) independent of the vendor.

Based on the above we can generate a BIFT-id following the draft proposal. Two different vendors having BIER configured will be interoperable because they generate the same BIFT-id, without having to configure it.

It is also possible to configure:

router bier
 encapsulation non-mpls bsl 256
  sub-domain 1
   source loopback 0
   bift-id 10000
  !
 !
!

Now the operator needs to manage value ‘10000’ and make sure its configure on every router the same.

Thx,

Ice.


> On 27 Feb 2018, at 18:46, Eric C Rosen <erosen@juniper.net> wrote:
> 
> On 2/27/2018 12:25 PM, IJsbrand Wijnands wrote:
>> If we want to be interoperable among different vendors, I think it is good to have this documented.
> 
> This is the sort of statement that really worries me.  What is the interoperability issue?  As long as a vendor allows the assignment of BIFT-ids, interoperability should be possible without the need for any particular suggested way of constructing the BIFT-ids.
> 
> I'm not sure we can say both that the draft is informational, and that it is needed for multi-vendor interoperability.
>

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