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Re: [Idr] Early allocation request for draft-ietf-idr-segment-routing-te-policy

"John G. Scudder" <jgs@juniper.net> Fri, 06 October 2017 20:31 UTC

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From: "John G. Scudder" <jgs@juniper.net>
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Date: Fri, 06 Oct 2017 16:31:02 -0400
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Cc: "idr@ietf.org" <idr@ietf.org>, "shares@ndzh.com" <shares@ndzh.com>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, "Jose Liste (jliste)" <jliste@cisco.com>, "Arjun Sreekantiah (asreekan)" <asreekan@cisco.com>, "Dhanendra Jain (dhjain)" <dhjain@cisco.com>
To: "Gaurav Dawra (gdawra)" <gdawra@cisco.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/XbWL1mLJimQDmQh6qPQA8-y696o>
Subject: Re: [Idr] Early allocation request for draft-ietf-idr-segment-routing-te-policy
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Hi Gaurav,

This thread is exactly to discuss the proposed early allocation for those sub-TLVs. However I'm a little confused (or perhaps concerned) by your note, since you list explicit values that aren't available. As you can see if you consult the IANA registry (https://www.iana.org/assignments/bgp-parameters/bgp-parameters.xhtml#tunnel-sub-tlvs) both 6 and 7 have already been allocated. 128 is currently unallocated and I see no reason that preference couldn't be satisfied, but I don't think the requests for 6 and 7 can be.

I would anticipate IANA would allocate the first two unused values for Preference and Binding SID.

As for when it will be done, the discussion period will close this coming Tuesday, October 10. Assuming no blocking objections are raised, I'll forward the request to the AD and IANA. They've usually been able to process such requests within a few days, so it's possible the values will be allocated before end of next week. Of course I'll keep the list posted about progress.

--John

> On Oct 6, 2017, at 4:17 PM, Gaurav Dawra (gdawra) <gdawra@cisco.com> wrote:
> 
> John,
>  
> +1
>  
> We would like to request for allocation for following Sub-TLV to be. Pls let us know when the allocation is done.
>  
> Preference sub-TLV
> 6
> Binding SID sub-TLV
> 7
> Segment List sub-TLV
> 128
>  
>  
> Cheers,
>  
> Gaurav
>  
> From: Idr <idr-bounces@ietf.org> on behalf of "John G. Scudder" <jgs@juniper.net>
> Date: Friday, October 6, 2017 at 5:50 AM
> To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
> Cc: "idr@ietf.org" <idr@ietf.org>, "shares@ndzh.com" <shares@ndzh.com>
> Subject: Re: [Idr] Early allocation request for draft-ietf-idr-segment-routing-te-policy
>  
> On Oct 6, 2017, at 1:53 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.com <mailto:ginsberg@cisco.com>> wrote:
>> [Les:] It is quite useful I think to point out this fact - but I fail to see how it is relevant to the early allocation decision.  Given that we know that these early codepoints are not available, I do not see that delaying early allocation helps in any way. If there are implementations that used these unassigned codepoints, the sooner we assign values the sooner these implementations can be updated to use values which will be interoperable - so if anything the facts argue that we should accelerate early allocation - not delay it.
> 
>  
> That is a fine position to take and consistent with what I tried to express (whether it came through clearly or not).
>  
> Thanks,
>  
> --John

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