FTP server on Multiple IPs/ISP

Existing setup:
 
Two ISPs terminated in Firewall. If one ISP down, FTP will work via other ISP. (But clients across India and abroad has to change the FTP Server  IP)
 
Our requirement:
FTP has to work on domain basis, via both ISP round robin (active-active).

We tries with two A records for ftp.domain.in. But at a time FTP is accessible via one ISP only.
Whe ISP1 disconnedted, it takes 90 mts for other ISP to access FTP.

Please suggest solution.
dinagaran2000managerAsked:
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Manuel FloresCommented:
I would try a Dynamic DNS configuration.  It is planned for what you are looking for.

Round-robin load balancing, even some services can test servers load to distribute it more evenly.  In case of a server fail, the service will remove from the available pool.

http://dyn.com/managed-dns/round-robin-load-balancing/

..MFlores..
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omarfaridCommented:
what is TTL (time to live) of A records? try to reduce it.
what is the default route for you? it should be both ISPs.
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Manuel FloresCommented:
Provide a valid solution to the issue
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