After reading thru Cisco's data center interconnect, it is interesting. However, how do you use it in the real world scenario and why would you do it? The idea is to extend layer 2 VLAN from one data center to another; basically creating a giant virtual data center. If a data center is down, another data center will pick up the transaction.
Can't you do the same with Global Server Load Balancing? I would think two MPLS connections to each data center is more than enough. Has anyone implement this data center interconnect using VPLS, EoMPLS, etc?
Can't you do the same with Global Server Load Balancing?
The answer depends on the application. If you are running an application that needs to have other servers in the same LAN and you want to have servers in different locations, you are forced to extend your L2 domain. DCI is the perfect solution.
If the application can interact with other servers running the same application and the communication can be routed, the GSLB would be the right solution.
Has anyone implement this data center interconnect using VPLS, EoMPLS, etc?