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Re: [Idr] New Version Notification for draft-ietf-idr-large-community-11.txt

"Jakob Heitz (jheitz)" <jheitz@cisco.com> Mon, 05 December 2016 02:16 UTC

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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: David Freedman <david.freedman@uk.clara.net>
Thread-Topic: [Idr] New Version Notification for draft-ietf-idr-large-community-11.txt
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Date: Mon, 05 Dec 2016 02:16:52 +0000
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Subject: Re: [Idr] New Version Notification for draft-ietf-idr-large-community-11.txt
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No new text is required to cover this: 23456 is not an ASN.
Besides, if anyone were to put it into a large community, no harm would be done other than what would happen if any other unassigned ASN were used.

About reserving values, we don't reserve values because the values are unusable, but because we may want to use them for other purposes later. There is no need to reserve another value. 3 is more than enough.

Thanks,
Jakob.


> On Dec 3, 2016, at 2:53 AM, David Freedman <david.freedman@uk.clara.net> wrote:
> 
> just had an offlist conversation with job, and he has recommended that I elaborate on this point as it may be non obvious to some.
> 
> The GA is intended to be an ASN, but IMHO AS_TRANS is not an ASN, it is a signal between peers in an OPEN exchange and a signal between hops that information is missing in some way, it is not an ASN in the sense that it should (or perhaps now even *could*) be used by anybody as a local ASN for a router.
> 
> As such I'm aware of code that exists which discriminates against AS_TRANS, there are various libraries which handle data structures like ASNs (which could be used in , say , creating or validating a GA field) which would be very unhappy if fed AS_TRANS as their initial input.
> 
> I understand we want to progress the draft , and that and a line has to be drawn between what could be unwise in implementations , vs what could be unwise to be seen on the internet , and that a registry can exist for the latter , but this is something I feel strongly should live on the former side , and if a list of values is going to be specified in the draft , I feel this should be in it (irony aside).
> 
> Dave 
> 
>> On 3 Dec 2016, at 10:14, David Freedman <david.freedman@uk.clara.net> wrote:
>> 
>> last minute nit: if we are going to recommend that particular reserved ASNs are avoided for the global administrator, can we please include AS_TRANS (RFC6793), there is probably a certain irony in not doing so.
>> 
>> Dave
> 
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