Generic Routing Encapsulation (GRE) Tunnel Configuration in Cisco Packet Tracer (LAB)

 

PART 1 - Configure Basic Stuff
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Step 1:- Create the topology as shown in the diagram in Packet Tracer.

Step 2:- Configure Hostname and IP addresses Routers, Switches and PCs as shown in the diagram.

Step 3:- On Pune Router & Chennai Router configure default route pointing towards ISP.

PART 2 -Configure GRE Tunnel Between Pune Router & Chennai Router
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Step 1:-Configure GRE Tunnel interfaces on Pune Router & Chennai Router as shown in the diagram
        keeping source as WAN interfaces

Step 2:-Verify the status of the GRE Tunnel 0 , Tunnel Protocol , Tunnel source & destination.

Step 3:-Ping accross tunnel from both routers.

Step 4:-Traceroute to determine the path to the tunnel. =====> one hop !!!!!

PART 3 - Configure Routing over GRE Tunnel
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Step 1:- Configure EIGRP AS 100 on Pune Router & Chennai Router and advertise the tunnel , LAN networks.

Step 2:-Verify EIGRP Neighborship.

Step 3:-Verify the routing table.

Step 4:-Check end to end connectivity by ping PC1 to PC2 and vice versa.