Re: [Idr] I-D Action: draft-ietf-idr-as0-01.txt

On Dec 16, 2011, at 8:05 PM, Enke Chen wrote:

> Warren:
> 
> A couple comments:
> 
>  1) Is it really necessary to make AS 0 an error in the AGGREGATOR and AS4_AGGREGATOR attributes?  What is the gain?

I'll double check with co-authors on Monday -- I don't think it is strictly necessary to prevent attack, rather it seemed more elegant to check AS 0 where ever it occurs.

It was brought up on the NANOG list that some vendors support zero'ing out the AGGREGATOR (see Junipers "no-aggregator-id" as an example -- this appears to only zero out the router ID, but I haven't checked all implementations), so checking for AS 0 in the .*AGGREGATOR may be a bad idea, so at the moment I'm leaning towards removing it (obviously, this being a WG doc, with the WG's approval)

> 
>  2) The error handling for AS4_PATH / AS4_AGGREGATOR is specified in rfc4893bis (draft-ietf-idr-rfc4893bis-04.txt). Thus it should be referenced if you specify AS 0 as an error for the AS4_PATH / AS4_AGGREGATOR.
> 

Doh! This was mentioned a few times and I intended to do so, but it completely slipped my mind when typing... Thanks for reminding me....

W

> Thanks.  -- Enke
> 
> do not have much impact.  Why
> 
> On 12/16/11 10:39 AM, Warren Kumari wrote:
>> As requested, this version separates the error definition and error handling by pointing to the draft-ietf-idr-error-handling document...
>> 
>> 
>> Thanks to everyone who provided feedback on -00.
>> W
>> 
>> 
>> On Dec 16, 2011, at 1:23 PM, internet-drafts@ietf.org wrote:
>> 
>>> A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Inter-Domain Routing Working Group of the IETF.
>>> 
>>> 	Title           : Codification of AS 0 processing.
>>> 	Author(s)       : Warren Kumari
>>>                          Randy Bush
>>>                          Heather Schiller
>>> 	Filename        : draft-ietf-idr-as0-01.txt
>>> 	Pages           : 6
>>> 	Date            : 2011-12-16
>>> 
>>>   This document proscribes the use of AS 0 in BGP OPEN and AS_PATH /
>>>   AS4_PATH BGP attribute.
>>> 
>>> 
>>> A URL for this Internet-Draft is:
>>> http://www.ietf.org/internet-drafts/draft-ietf-idr-as0-01.txt
>>> 
>>> Internet-Drafts are also available by anonymous FTP at:
>>> ftp://ftp.ietf.org/internet-drafts/
>>> 
>>> This Internet-Draft can be retrieved at:
>>> ftp://ftp.ietf.org/internet-drafts/draft-ietf-idr-as0-01.txt
>>> 
>>> _______________________________________________
>>> Idr mailing list
>>> Idr@ietf.org
>>> https://www.ietf.org/mailman/listinfo/idr
>>> 
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