Basically, I have created a GRE tunnel
I'd put Packet Tracer file, but the discussion won't accept the format
these are the networks
OSPF 10area 0GRE tunnel172.16.100.0 /30CS1-R1 net192.168.1.0 /30R1-ISP net1.1.1.0 /30R2-ISP net1.1.1.4 /30R2-CS2192.1...