[AusNOG] AS 4byte support in .au

[Geoff Huston]

On 02/07/2009, at 10:19 AM, Tim Warnock wrote:

>> Not if your upstream can't put a 4byte AS in their BGP config to  
>> you I am
> guessing.
>
> You can do things like peer with your customer using AS23456, but  
> that's
> just evil.


"just evil" - what a strange assertion.


>
> The issue I see so far from 32bit ASNs are lack of support from our
> favourite vendor in versions people would be comfortable running.
>


from the installed base of BGP all these 4 byte ASNs appear as AS  
23456. which is a perfectly fine AS number in the 2 byte AS BGP world.


> http://www.apricot.net/apricot2009/images/lecture_files/apricot-2008-32-bit-
> asn.pdf
> (Page 15) has a list of vendors and their versions required for  
> support.


4 byte AS numbers have been used in the Internet now for the last 2  
1/2 years - there are 31 visible today in BGP from where I sit in the  
routing syste, and as far as I can see the Internet has been just fine  
and noone has noticed, nor cared. Sio why do you think that you need  
to do anything to your routers to support 4 byte AS numbers, assuming  
that your 2 byte AS number is working just fine?

Geoff