Yep, we do it that way. We basically treat each of our datacenter's as their own entity, using separate space for each, but all with the same AS #. What Joel mentioned is going to be the major catch, in that for each of the two disconnected AS's to accept the opposite sites routes, you'd need to relax BGP's loop prevention check (which looks for it's own AS # within the AS Path of incoming routes). If your on Cisco gear, you'd need to add an additional command under the BGP neighbor configuration that says "allowas-in". Here's a breif doc from Cisco on configuring this http://www.cisco.com/image/gif/paws/112236/allowas-in-bgp-config-example.pdf David. On Sat, Jun 25, 2011 at 9:39 PM, Joel Jaeggli <joelja@bogus.com> wrote:
On Jun 25, 2011, at 6:03 PM, Deric Kwok wrote:
Hi
Can we use same AS to advertise different networks in different location?
We would like to use Seattle as production network and New York as testing
eg: Seattle: network 66.49.130.0/24
New York: network 67.55.129.0/24 and ipv6 network.
Thank you
Assuming you want the two instances to be able talk to each other you just have to relax loop detection so that you will accept prefixes from your AS...