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Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acceptown-community-01.txt

Enke Chen <enkechen@cisco.com> Wed, 30 April 2008 20:48 UTC

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Date: Wed, 30 Apr 2008 13:49:11 -0700
From: Enke Chen <enkechen@cisco.com>
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To: Danny McPherson <danny@tcb.net>
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Subject: Re: [Idr] Fwd: I-D ACTION:draft-pmohapat-idr-acceptown-community-01.txt
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Danny McPherson wrote:
>
> On Apr 30, 2008, at 2:37 PM, Enke Chen wrote:
>
>> Hi, Danny:
>>
>> Regarding the specific change from 1966 to RFC 2796 that you 
>> mentioned, the reason was to make the spec. be consistent with the 
>> deployment (which has the behavior since Day 1 of the RR era).
>
> Not all implementations, else I'd have not seen conflicts ~10
> years ago between two of the most prominent implementations.

So would you prefer declaring the major deployment as "illegal", and 
somehow having all the deployment rolled back?

>
>> AFAIK, there is nothing unusual about it in the iterative process for 
>> a protocol, and it is not alone. Take RFC 4271 as an example, one of 
>> the changes is the following:
>>
>>    UPDATE Message Error subcode 7 (AS Routing Loop) has been deprecated.
>>
>>
>> The change reflects deployment and allows for implementation 
>> flexibility.
>
> Flexibility?  That's a gratuitous choice of words...

It's meant for the "AS Routing loop", although it equally applies to the 
RR case.

-- Enke


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