{"id":625,"date":"2011-09-28T05:11:32","date_gmt":"2011-09-28T09:11:32","guid":{"rendered":"http:\/\/www.xavignu.com\/?p=625"},"modified":"2011-09-28T05:11:32","modified_gmt":"2011-09-28T09:11:32","slug":"connecting-gns3-simulator-to-the-internet-part-2","status":"publish","type":"post","link":"https:\/\/www.xavignu.com\/?p=625","title":{"rendered":"Connecting GNS3 simulator to the Internet (part 2)"},"content":{"rendered":"

So now we need to configure a cloud to connect GNS3 to the laptop. We should already have tap0 up and running and IPtables<\/a> configured to allow traffic as seen on the previous post<\/a>.<\/p>\n

Below is a network topology diagram.
\n

\n\"GNS3<\/a>
\n
\nWe need to create the cloud connecting it to tap0 interface. For that we edit the .net file containing the topology and add the following.<\/p>\n


\n [[ROUTER R2]]
\n model = 3640
\n console = 2002
\n aux = 2108
\n cnfg = configs\/R2.cfg
\n slot0 = NM-1FE-TX
\n f0\/0 = nio_tap:tap0
\n slot1 = NM-4T
\n s1\/0 = R3 s1\/0
\n slot2 = NM-1E
\n e2\/0 = R1 f2\/0
\n slot3 = NM-16ESW
\n x = -21.0
\n y = -61.0
\n<\/text>
\nand for the cloud
\n
\n [[Cloud C2]]
\n x = -63.8566172588
\n y = 84.919044975
\n connections = R2:f0\/0:nio_tap:tap0
\n<\/text>
\nNow save the configuration and restart GNS3.<\/p>\n

Now there should be connectivity to the gateway (192.168.1.1). To connect to the internet add a default gateway.<\/p>\n

Router2#conf t<\/b>
\nEnter configuration commands, one per line. End with CNTL\/Z.
\nRouter2(config)#ip rou
\nRouter2(config)#ip route
\nRouter2(config)#ip route 0.0.0.0 0.0.0.0 192.168.1.1<\/b>
\nRouter2(config)#do sh ip route<\/b>
\nCodes: C – connected, S – static, R – RIP, M – mobile, B – BGP
\n D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
\n N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
\n E1 – OSPF external type 1, E2 – OSPF external type 2
\n i – IS-IS, su – IS-IS summary, L1 – IS-IS level-1, L2 – IS-IS level-2
\n ia – IS-IS inter area, * – candidate default, U – per-user static route
\n o – ODR, P – periodic downloaded static route<\/p>\n

Gateway of last resort is 192.168.1.1 to network 0.0.0.0<\/p>\n

172.16.0.0\/16 is variably subnetted, 2 subnets, 2 masks
\nC 172.16.0.0\/30 is directly connected, Ethernet2\/0
\nD 172.16.0.0\/16 is a summary, 00:18:32, Null0
\n 10.0.0.0\/8 is variably subnetted, 2 subnets, 2 masks
\nC 10.0.0.0\/30 is directly connected, Serial1\/0
\nD 10.0.0.0\/8 is a summary, 00:18:32, Null0
\n 192.168.1.0\/30 is subnetted, 1 subnets
\nC 192.168.1.0 is directly connected, FastEthernet0\/0
\nS* 0.0.0.0\/0 [1\/0] via 192.168.1.1
\nRouter2(config)#<\/p>\n

We can see the connectivity below.
\n
\n\"Connectivity<\/a><\/p>\n

Also don’t forget to add the routes on your Linux box for the other routers.<\/p>\n

[11:07:13] xavi@lstkco14073: ~ $ sudo ip route add 172.16.0.0\/30 dev tap0<\/b>
\n[11:07:49] xavi@lstkco14073: ~ $ sudo ip route add 10.0.0.0\/30 dev tap0<\/b>
\n[11:08:13] xavi@lstkco14073: ~ $ netstat -nr | grep tap<\/b>
\n10.0.0.0 0.0.0.0 255.255.255.252 U 0 0 0 tap0
\n172.16.0.0 0.0.0.0 255.255.255.252 U 0 0 0 tap0
\n192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 tap0
\n[11:08:21] xavi@lstkco14073: ~ $ ping -c 3 10.0.0.1<\/b>
\nPING 10.0.0.1 (10.0.0.1) 56(84) bytes of data.
\n64 bytes from 10.0.0.1: icmp_req=1 ttl=255 time=19.9 ms
\n64 bytes from 10.0.0.1: icmp_req=2 ttl=255 time=3.12 ms
\n64 bytes from 10.0.0.1: icmp_req=3 ttl=255 time=6.61 ms<\/p>\n

— 10.0.0.1 ping statistics —
\n3 packets transmitted, 3 received, 0% packet loss, time 2001ms
\nrtt min\/avg\/max\/mdev = 3.122\/9.878\/19.901\/7.229 ms
\n[11:08:39] xavi@lstkco14073: ~ $ <\/p>\n

That would be all. Comments and suggestions are more than welcome. \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"

So now we need to configure a cloud to connect GNS3 to the laptop. We should already have tap0 up and running and IPtables configured to allow traffic as seen on the previous post. Below is a network topology diagram. We need to create the cloud connecting it to tap0 interface. For that we edit […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[3],"tags":[30,56,22,6,70],"jetpack_featured_media_url":"","jetpack_publicize_connections":[],"jetpack_shortlink":"https:\/\/wp.me\/pTQgt-a5","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.xavignu.com\/index.php?rest_route=\/wp\/v2\/posts\/625"}],"collection":[{"href":"https:\/\/www.xavignu.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xavignu.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xavignu.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xavignu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=625"}],"version-history":[{"count":12,"href":"https:\/\/www.xavignu.com\/index.php?rest_route=\/wp\/v2\/posts\/625\/revisions"}],"predecessor-version":[{"id":639,"href":"https:\/\/www.xavignu.com\/index.php?rest_route=\/wp\/v2\/posts\/625\/revisions\/639"}],"wp:attachment":[{"href":"https:\/\/www.xavignu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=625"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xavignu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=625"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xavignu.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}