I am building a back up link between 2 data centers. my plan is to get an internet T1 for each datacenter. This will allow for database traffic to replicate between the 2 datacenters and be a source of communication if the private link fails. My thought was to use LAN 2 LAN VPN with IKE, IPSEC, and L2TP. I am hoping folks that have been in my position before may have discovered a better way to do things or help me learn from the mistakes!
My questions are:
Is there are better way of doing this? Is there a better design method, internet T1 or DSL?
Equipmnet - PIX 501,ASA 5500, VPN Concentrators, ISR router with advanded IOS (FW\\VPN), or Sonicwall?
All realistc recommedations are welcome!