How to configure VPN on cisco router
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In this tutorial we are going to learn how to configure Vpn on cisco router using cisco packet tracer.
It is very easy to configure vpn on cisco router just follow these simple steps
Here First you can see the diagram to understand clearly what actually we have to do for configure vpn on cisco router.
Step-1 Here i have taken 3 routers and 2 pc’s and then i have connected them to each other
Step-2 Now we have to configure the ip address to all the routers and pc’s
Configuration on Router 1
Router>enable Router#config t Router(config)#int f0/0 Router(config-if)#ip add 192.168.1.1 255.0.0.0 Router(config-if)#no shut Router(config-if)#exit Router(config)# Router(config)#int f0/1 Router(config-if)#ip add 1.0.0.2 255.0.0.0 Router(config-if)#no shut Router(config)#exit Router#
Configuration On Router 2
Router>en Router#config t Router(config)#int f0/0 Router(config-if)#ip add 1.0.0.3 255.0.0.0 Router(config-if)#no shut Router(config-if)#exit Router(config)#int f0/1 Router(config-if)#ip add 2.0.0.1 255.0.0.0 Router(config)#exit Router(config)#
Configuration On Router 3
Router> Router>en Router#config t Router(config)#int f0/0 Router(config-if)#ip add 2.0.0.2 255.0.0.0 Router(config-if)#no shut Router(config-if)#exit Router(config)#int f0/1 Router(config-if)#ip add 192.168.2.1 255.0.0.0 Router(config-if)#no shut Router(config)#exit Router(config)#
Now Our Assining of the ip address to the router is complete now we have to do the routing to all the routers
Step-3 Here i am doing default routing to all the routers
Default Routing Configuration On Router 1
Router#config t Router(config)# Router(config)#ip route 0.0.0.0 0.0.0.0 1.0.0.1 Router(config)#exit Router#
Default Routing Configuration On Router 3
Router#config t Router(config)# Router(config)#ip route 0.0.0.0 0.0.0.0 2.0.0.1 Router(config)#exit Router#
Step-4 After Configuring default routing to the router now we have to check that routing which we have done before is working or not by pinging the router with each other so here i am going to check that
r1#ping 2.0.0.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 2.0.0.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 26/28/33 ms
Step-5 Now go to router3 and test that network is working or not by pinging
r3#ping 1.0.0.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 1.0.0.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 25/28/32 ms
Step-6 Now create VPN tunnel between R1 and R3:
First create a VPN tunnel on router R1:
r1#config t r1(config)#interface tunnel 10 r1(config-if)#ip address 172.16.1.1 255.255.0.0 r1(config-if)#tunnel source fa0/1 r1(config-if)#tunnel destination 2.0.0.2 r1(config-if)#no shut
Now we have to create VPN Tunnel on router R3:
r3#config t r3(config)#interface tunnel 100 r3(config-if)#ip address 172.16.1.2 255.255.0.0 r3(config-if)#tunnel source fa0/0 r3(config-if)#tunnel destination 1.0.0.1 r3(config-if)#no shut
Step-7 Now test communication between these two routers again by pinging eah other:
r1#ping 172.16.1.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.1.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 30/32/36 ms r1#
r3#ping 172.16.1.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 33/45/83 ms r3#
Step-8 Now Do routing for created VPN Tunnel on Both Router R1 and R3:
r1(config)#ip route 192.168.2.0 255.255.255.0 172.16.1.2 r3(config)#ip route 192.168.1.0 255.255.255.0 172.16.1.1
Step-9 Now here i am going to test that VPN Tunnel is configured or not
r1#show interfaces Tunnel 10 Tunnel10 is up, line protocol is up (connected) Hardware is Tunnel Internet address is 172.16.1.1/16 MTU 17916 bytes, BW 100 Kbit/sec, DLY 50000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation TUNNEL, loopback not set Keepalive not set Tunnel source 1.0.0.1 (FastEthernet0/1), destination 2.0.0.2 Tunnel protocol/transport GRE/IP Key disabled, sequencing disabled Checksumming of packets disabled Tunnel TTL 255 Fast tunneling enabled Tunnel transport MTU 1476 bytes Tunnel transmit bandwidth 8000 (kbps) Tunnel receive bandwidth 8000 (kbps) Last input never, output never, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1 Queueing strategy: fifo Output queue: 0/0 (size/max) 5 minute input rate 32 bits/sec, 0 packets/sec 5 minute output rate 32 bits/sec, 0 packets/sec 52 packets input, 3508 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 0 input packets with dribble condition detected 52 packets output, 3424 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 unknown protocol drops 0 output buffer failures, 0 output buffers swapped out
Now going to Router R3 and test VPN Tunnel Creation:
r3#show interface Tunnel 100 Tunnel100 is up, line protocol is up (connected) Hardware is Tunnel Internet address is 172.16.1.2/16 MTU 17916 bytes, BW 100 Kbit/sec, DLY 50000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation TUNNEL, loopback not set Keepalive not set Tunnel source 2.0.0.2 (FastEthernet0/0), destination 1.0.0.1 Tunnel protocol/transport GRE/IP Key disabled, sequencing disabled Checksumming of packets disabled Tunnel TTL 255 Fast tunneling enabled Tunnel transport MTU 1476 bytes Tunnel transmit bandwidth 8000 (kbps) Tunnel receive bandwidth 8000 (kbps) Last input never, output never, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1 Queueing strategy: fifo Output queue: 0/0 (size/max) 5 minute input rate 32 bits/sec, 0 packets/sec 5 minute output rate 32 bits/sec, 0 packets/sec 52 packets input, 3424 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 0 input packets with dribble condition detected 53 packets output, 3536 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 unknown protocol drops
Step-10 Now how we can trace vpn tunnel path
PC>ipconfig FastEthernet0 Connection:(default port) Link-local IPv6 Address.........: FE80::2E0:8FFF:FE0B:AEB2 IP Address......................: 192.168.2.2 Subnet Mask.....................: 255.255.255.0 Default Gateway.................: 192.168.2.1 PC>ping 192.168.1.2 Pinging 192.168.1.2 with 32 bytes of data: Reply from 192.168.1.2: bytes=32 time=61ms TTL=126 Reply from 192.168.1.2: bytes=32 time=55ms TTL=126 Reply from 192.168.1.2: bytes=32 time=55ms TTL=126 Reply from 192.168.1.2: bytes=32 time=57ms TTL=126 Ping statistics for 192.168.1.2: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 55ms, Maximum = 61ms, Average = 57ms PC>tracert 192.168.1.2 Tracing route to 192.168.1.2 over a maximum of 30 hops: 1 3 ms 0 ms 18 ms 192.168.2.1 2 35 ms 30 ms 30 ms 172.16.1.1 3 65 ms 59 ms 60 ms 192.168.1.2 Trace complete. PC>
This is all how to configure vpn on cisco router using cisco packet tracer.
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