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 Post subject: GRE to internet on Windows 7
PostPosted: Wed May 21, 2014 2:58 pm 

Joined: Wed May 21, 2014 2:23 pm
Posts: 1
Hi Team.

I have GNS3 installed on windows 7. A Router R1 is connected to cloud. Cloud is connected to MS Loopback Adapter. ICS is configured so that Loopback can communicate to internet.

Further I configured a Router R1 which is now reaching the internet.

Now, I have configured a GRE tunnel.

interface Tunnel0
description Z
ip address
ip virtual-reassembly
keepalive 5 3
tunnel source FastEthernet0/1
tunnel destination

However tunnel is not coming up. What I observe is the GRE traffic is not going to internet from my windows box.

Router#sh int tun0
Tunnel0 is up, line protocol is down
Hardware is Tunnel
Description: Z
Internet address is
MTU 1514 bytes, BW 9 Kbit, DLY 500000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive set (5 sec), retries 3
Tunnel source (FastEthernet0/1), destination
Tunnel protocol/transport GRE/IP
Key disabled, sequencing disabled
Checksumming of packets disabled
Tunnel TTL 255
Fast tunneling enabled
Tunnel transmit bandwidth 8000 (kbps)
Tunnel receive bandwidth 8000 (kbps)
Last input 01:33:55, output 00:00:03, output hang never
Last clearing of "show interface" counters never
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

R1[]--->MS-Loopback Adapter: [] --> Windows 7 with ICS [] --> DSL []--> internet

Traffic is seen on the loop back adapter but is not handed over to
Images Attached:

What I am trying to achieve is configure a GRE on GNS3 Cisco Router to connect to a tunnel over internet. Where GNS3 is installed on Windows 7
Please suggest

File comment: Network Capture showing GRE Packet being sent through loopback adapter
Gre2.PNG [ 20.79 KiB | Viewed 1830 times ]
File comment: Router Topology
gre1.PNG [ 10.48 KiB | Viewed 1830 times ]
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