[135008] in North American Network Operators' Group
Re: Single AS Number for multiple prefixes in different country
daemon@ATHENA.MIT.EDU (Bogdan)
Fri Jan 14 06:34:10 2011
Date: Fri, 14 Jan 2011 13:33:48 +0200
From: Bogdan <shoshon@shoshon.ro>
To: NANOG list <nanog@nanog.org>
In-Reply-To: <409DB694-6C64-4EC3-A8B3-F31E362D0A33@ianai.net>
Reply-To: shoshon@shoshon.ro
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 14.01.2011 12:06, Patrick W. Gilmore wrote:
> On Jan 14, 2011, at 4:58 AM, Harris Hui wrote:
>
>> We have an AS Number AS2XXXX and have 2 /24 subnets belongs to this AS
>> Number. It is using in US and peering with US Service Providers now.
>>
>> We are going to deploy another site in Asia, can we use the same AS Number
>> AS2XXXX and have 2 other /24 subnets and peering with other Asia Service
>> Providers?
>>
>> Will it affect the routing or BGP Path of our existing subnets in US?
>
> It will not. There was a thread on this a short while ago, check the archives.
>
> The big question is whether the two sites will be able to talk to each other. There are ways to make that happen, but by default, a router in asXXXX will not accept eBGP announcements which include asXXXX (loop detection).
>
allowas-in will do the trick
