@RahulPrasadh do you have MXs or vMXs at each site including the backup data centre? If so and both data centres are set up as hubs, then you can simply set the backup DC as the secondary hub.
If you want to use the same IP addresses etc. in both datacentres then there are more steps and alternate approaches.
If my answer solves your problem please click Accept as Solution so others can benefit from it.
