Consolidation of data from multiple Regional server to Central server

Hi

There are 230 regional servers which are connected to the central server. Data will be inserted in regional servers database during the working hours of the day. By the end of the day we have to insert the same data to the central server. Table structures are same in all 230 regional servers and central server. But, tables in each of the regional server have Id column which is generated based on IDENTITY and when they get consolidated into central server, the central server Id column should maintain IDENTITY, instead of just consolidating Id column from all the 230 tables. This insertion of data is a daily activity, has to be automated and each data should be inserted once in the central server.

Please suggest how we can accomplish this task.

Thanks in advance!
Partha