Through NAT private IPs communicate with each other. So can’t NATing alone help? Why do we need to do GRE tunnelling?
@jitisha2209
Nat Role is different and GRE Tunnel role is Different. Nat help us to communicate with public network from Private Network by translating Pvt. IP to Public IP, and in GRE Tunnel, we establish connection between Head office and Branch office Over Public network… so that branch office and head office private networks can communicate each other Hope my reply clear your doubt. Pls correct me if i am wrong…