nanog mailing list archives
Re: Multi site BGP Routing design
From: "Michael K. Smith" <mksmith () adhost com>
Date: Fri, 05 Jun 2009 18:37:02 -0700
On 6/5/09 4:42 PM, "Steve Bertrand" <steve () ibctech ca> wrote:
Justin Krejci wrote: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?No, because your router at site 2 will not accept any prefix with its own AS in the AS_PATH (which site 1 would be advertising from).
If you're running Cisco with the right IOS it looks like you could use the 'neighbor x.x.x.x allowas-in' command to accept your own AS. Then you would just have to set your local route origination so that the appropriate routes were withdrawn when the backnet link goes down. Mike
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)
- RE: Multi site BGP Routing design Justin Krejci (Jun 08)
- RE: Multi site BGP Routing design Ivan Pepelnjak (Jun 09)
- 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 Chuck Anderson (Jun 05)