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...9 brd ff:ff:ff:ff:ff:ff 4: gre0: <NOARP,UP> mtu 1476 qdisc noqueue link/gre 0.0.0.0 brd 0.0.0.0 5: gretun@eth0: <POINTOPOINT,NOARP,UP> mtu 8776 qdisc noqueue link/gre 66.1.1.161 peer 66.1.2.161 root@den1tun01:/home/root $ ip tun gre0: gre/ip remote any local any ttl inherit nopmtudisc gretun: gre/ip remote 66.1.2.161 local 66.1.1.161 dev eth0 ttl 20 root@den1tun01:/home/root $ ifconfig eth0 Link encap:Ethernet HWaddr 00:19:B9:DD:FF:D9 inet addr:10.1.2.243 Bcast:10.1.3.255 Mask:255.255.254.0 UP BROADCAST RUNNING MULTICAST MTU:8800 Metric:1...

...rd 0.0.0.0 12: GDC1@NONE: <POINTOPOINT,NOARP,PROMISC,UP> mtu 1514 qdisc noqueue link/gre 192.168.1.97 peer 192.168.1.1 13: ppp1: <POINTOPOINT,MULTICAST,NOARP,UP> mtu 1452 qdisc pfifo_fast qlen 3 link/ppp rx1000test:~# ip tun show gre0: gre/ip remote any local any ttl inherit nopmtudisc GDC1: gre/ip remote 192.168.1.1 local 192.168.1.97 ttl 255 rx1000test:~# ip route show 202.42.98.1 dev ppp1 proto kernel scope link src 202.42.98.62 192.168.1.0/28 via 192.168.2.110 dev GDC1 192.168.2.96/28 dev GDC1 proto kernel scope link src 192.168.2.97 192.168.1.96/28 dev eth1 proto k...

...he IP of gw A is 10.157.108.4 The IP of gw B is 10.29.212.6 The IP of C is 10.157.108.213 They are in an ad-hoc network, A can see C but not B, and B can see C. The steps are: - the node C creates for each gw an IPIP tunnel to A and a second to B tunl0: ip/ip remote any local any ttl inherit nopmtudisc tunl1: ip/ip remote any local 10.157.108.214 ttl inherit - the node C assigna a different IP to each tunnel ifconfig tunl0 10.157.108.213 ifconfig tunl1 10.157.108.214 At this point we have two different interfaces and we can use the LARTC method: http://www.lartc.org/howto/lartc.rpdb.mul...