nanog mailing list archives
Multi site BGP Routing design
From: "Justin Krejci" <jkrejci () usinternet com>
Date: Fri, 5 Jun 2009 17:50:28 -0500
We have two geographically distinct locations that currently both fall under the same ASN. At site 1 we have a particular set of ip networks (/20 and bigger) in use only locally to this site At site 2 we have a separate set of ip networks (/20 and bigger) in use only locally to this site Each site has at least one upstream internet connection advertising with BGP. There is also a (reliable) private link between to the two sites where our routers at each site are all talking iBGP (as well as ospf). There is a router subnet (/27) that spans the two sites. We currently advertise all subnets out all upstream connections as if both sites were only one and traffic routes between sites without issue via the private link. If the private link between the two sites fails, will BGP allow for us to access the IP subnets at site 2 from site 1 via the internet given that both sites are advertising under the same ASN? Is this a case where having multiple ASNs makes sense to treat each site as remote peers to each other? Thanks, Justin
Current thread:
- Multi site BGP Routing design Justin Krejci (Jun 05)
- Re: Multi site BGP Routing design Steve Bertrand (Jun 05)
- Re: Multi site BGP Routing design Chris Adams (Jun 05)
- RE: Multi site BGP Routing design John.Herbert (Jun 05)
- Re: Multi site BGP Routing design Steve Bertrand (Jun 05)
- RE: Multi site BGP Routing design John.Herbert (Jun 05)
- Re: Multi site BGP Routing design Chris Adams (Jun 05)
- Re: Multi site BGP Routing design Steve Bertrand (Jun 05)
- Re: Multi site BGP Routing design Michael K. Smith (Jun 05)
- Re: Multi site BGP Routing design Steve Bertrand (Jun 05)
- RE: Multi site BGP Routing design Ivan Pepelnjak (Jun 06)
- Re: Multi site BGP Routing design Saqib Ilyas (Jun 06)
- Re: Multi site BGP Routing design Adam Greene (Jun 06)