Transmitting Multi-Protocol Local Network Data Through a GRE Tunnel

In Figure 1, subnets located in different areas, need to communicate through the public IP network. Term1 and Term2 are the local networks running IPv6. Term3 and Term4 are local networks running the IP protocol.

Figure 1 Transmitting multi-protocol local network data through a GRE tunnel

Switch_1 and Switch_2 set up a GRE tunnel through which Term1 can communicate with Term2 without affecting communication between Term3 and Term4.