Routing

We are building out a new datacenter using Juniper equipment and I'm wondering if I can

use my existing ASN at the new site in pararell with my exisitng site.  Subnets will be different at both sites, and several internet providers

for multi-homed enviroment. 

Within the Internet, an Autonomous System (AS) is a collection of connected IP routing prefixes under the control of one or more network operators that presents a common, clearly defined routing policy to the Internet, cf. RFC 1930, Section 3. In a similar fashion, you can also use the same ASN for multiple sites. To explain it further lets say

 

You got an ASN 1111 and you want to use this with provider A and B in USA; Yea you can use.

You wana use same ASN 1111 with provider A and B in Pakistan; Yea you can use.

You wana use same ASN 1111 with provider A and B in UK; Yea you can use.

 

HTH

Just make sure you have iBGP session between your two DC routers. If you get only full BGP table then your DC2 router doesn't accept your DC1 prefixes from eBGP neighbor and vice versa.

Thanks for the great feed back..

 

Thanks Bowling !