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GRE Tunnel Cheat Sheet (DRAFT) by

GRE Tunnel

This is a draft cheat sheet. It is a work in progress and is not finished yet.

Topologi

R1 & R2 Config­uration

R1(con­fig)# interface Tunnel­_name
R2(con­fig)# interface Tunnel­_name
R1(con­fig­-if)# ip address 172.16.1.1 255.25­5.255.0
R2(con­fig­-if)# ip address 172.16.1.2 255.25­5.255.0
R1(con­fig­-if)# ip mtu 1400
R2(con­fig­-if)# ip mtu 1400
R1(con­fig­-if)# ip tcp adjust-mss 1360
R2(con­fig­-if)# ip tcp adjust-mss 1360
R1(con­fig­-if)# tunnel source 1.1.1.1
R2(con­fig­-if)# tunnel source 2.2.2.2
R1(con­fig­-if)# tunnel destin­ation 2.2.2.2
R2(con­fig­-if)# tunnel destin­ation 1.1.1.1