ccna new york

ccna new york.Through this experiment, you can master: the working principle and characteristics of GRE..370.Cisco Networking Lab CCNA Lab Guide (2nd Edition)Configuration and characteristics of Tunnel interfaces. Configuration and debugging methods of GRE Tunnel. 2. Experimental topologyRemote office shy, Internet/Enterprise jealousy departmentThe experimental topology for configuring GRE is shown in Figure 19.13.Figure 19.13 Configuring the Experimental Topology of GREIn this experiment, routers R2 and R3 simulate the Internet, and routers R1 and R4 are connected to the Internet through static routes. The G0/0 interface of router R1 simulates the LAN where the remote office is located, and the G0/0 interface of router R4 simulates the LAN where the corporate headquarters is located. Use GRE tunnels to connect the remote office to the corporate headquarters and run EIGRP routing protocols at the remote office and corporate headquarters to connect the two networks. At the same time, you need to configure NAT on routers R1 and R4, so that the networks in the two locations can also access Intemeto(1)Configure router R1 R1 (config)#interface tunnel 0 to create a Tunnel interface with the number 0, the number of the Tunnel interface is valid locally and does not need to be the same as the other side Rl(config-if)#tunnel source serial0/0/0 to configure the source interface of the Tunnel. The router will use the address of this interface as the source address to reThe router will use the address of the interface as the source address to re-encapsulate the packet, or you can directly input the address of the interfaceR1 (config-if)#tunnel destination 61.0.0.4