Yes and no... If you plan to announce addresses from DC1 (provider 1) through DC2 (provider 2) in the case of a failure/loss of DC1 you could run into reachability issues. Some providers filter on allocation boundries so the /24 announcements will probably not be globally reachable. How severly this impacts you will depend on the function of the datacenter....
On Tue, 13 Nov 2001, Byron wrote: > Interested in feedback on using BGP as a Disaster Recovery and/or Load > Balancing solution: > > BACKGROUND > Currently, we have one production datacenter (COLO) (DC1) with 2 100MB feeds > to redundant 7200s, 2 ip class C blocks (say 1.1.1.x and 2.2.2.x) one behind > each 7200. this is a Cisco failover setup with all Cisco gear - mirrored > 6509s., local directors, PIXs, etc). primary and secondary DNS are behind > 7200 and a firewall on a DMZ. Third dns server is at separate corp site > (CORP) on DMZ which is connected via backend T1 on another VLAN... way > behind the 7200s. > > Anyway, to the fun part: > > OBJECTIVE: > Goal is to bring up a disaster recovery data-center (DC2) (another > location/provider) where by we could route traffic to this new site should > production site go down (within an hour). It doesn't have to be utilized > normally for complete loadbalancing, as it won't have all the hardware, > redundancy, etc. that DC1 has. This site would have its own class C block > (say 3.3.3.x) allocated from this new hosting center/ISP with backend T1 to > corp and perhaps a backend T1 to product DC1 for incremental DB > replication/administration, etc. > > Still trying to finish my CCNP, I'm a relative newbie with BGP, however > based on my understanding we were thinking that BGP would help solve this > problem by creating one AS comprised of the IP blocks at both locations (1&2 > from DC1 and 3 from DC2). We could inject weighted static routes into each > ISPs AS respectively and if the primary site failed traffic on the internet > destined for both 1.1.1.x and 2.2.2.x would be routed over to DC2. I realize > that there are many more details regarding the BGP setup but I'm trying to > narrow down the functional - high level architecture to communicate > internally for project approval. Is that a correct understanding? That is, > can BGP function this way? I'm wondering if anyone else out there is doing > this and can speak to whether (or not) BGP can help us out. > > Appreciate anyone's ideas or feedback- > Byron > > > > > _________________________________________________________ > Do You Yahoo!? > Get your free @yahoo.com address at http://mail.yahoo.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=26166&t=26147 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
