Datasheet
Lab – Configuring a Point-to-Point GRE VPN Tunnel
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Keepalive not set
Tunnel source 10.2.2.1, destination 10.1.1.1
Tunnel Subblocks:
src-track:
Tunnel0 source tracking subblock associated with Serial0/0/1
Set of tunnels with source Serial0/0/1, 1 member (includes iterators), on
interface <OK>
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 00:01:28, output 00:01:28, output hang never
Last clearing of "show interface" counters 00:02:50
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
5 packets input, 620 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
5 packets output, 620 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
c. Ping across the tunnel from the WEST router to the EAST router using the IP address of the tunnel
interface.
WEST# ping 172.16.12.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.12.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/34/36 ms
d. Use the traceroute command on the WEST to determine the path to the tunnel interface on the EAST
router. What is the path to the EAST router?
_____________________________________________________ 172.16.12.1 > 172.16.12.2
WEST# traceroute 172.16.12.2
Type escape sequence to abort.
Tracing the route to 172.16.12.2
VRF info: (vrf in name/id, vrf out name/id)
1 172.16.12.2 20 msec 20 msec *
e. Ping and trace the route across the tunnel from the EAST router to the WEST router using the IP address
of the tunnel interface.
What is the path to the WEST router from the EAST router? ____________________________________
172.16.12.2 > 172.16.12.1