You needn't BGP Backdoor option Prefer BGP Communities, easier, better On Mon, Oct 12, 2009 at 4:08 AM, Fossett, Jeff S <[email protected]>wrote:
> Hi Team - figured most of you could provide a fix for the following > scenario in your sleep, so I thought I'd reach out. > We have a Primary DataCenter and a DR Facility, attached via MPLS privately > (using EIGRP across that link to peer the two DataCenters)... both also have > an eBGP Peering Relationship with a Service Provider that is providing a > private Cellular APN. Though both connections are "Active" to the Service > Provider Cellular PN, we want an "Active/Standby" type of routing scenario. > Our DR Center is not built up in a manner that adequately supports > Active/Active from an Application/Middle Tier/Mainframe standpoint. > Scenario: In our BGP peering relationship with the ISP (giving Cell > Services) we are running eBGP. Whenever routes are learned with eBGP they > have a local cost of 20. Since our "DataCenter Gateway" is getting the > routes to the cell private networks from eBGP via "DR Gateway" they are > always preferred over the Portland learned EIGRP external routes with a 170 > cost. When peering to the cell carriers is active in both the DataCenter > and DR, the data sourced or destined for DR from the cell carrier networks > will fail. > Problem: We used the BGP Backdoor option on the DataCenter gateway to > change the distance on the Cellular Cloud networks from 20 to 200 in order > to allow our DataCenter gateway to prefer EIGRP routes within the DataCenter > environment, and then redistribute into BGP. > But once we put this in, BGP no longer advertises any networks that are > associated with the backdoor command. Should we pursue some sort of > Conditional Advertisement, or Synchronization/Redistribution scenario??? > Any advice? Thanks so much in advance for the help . . . > > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
