Hi, I have set up GRE tunnels accoding to the LARTC document but its not working. I have 3 routers connected in the form of a ring. They have interfaces as follows: Mars: 172.16.0.2, 172.16.1.1 Mercury: 172.16.0.1, 172.16.2.2 Pluto: 172.16.2.1, 172.16.1.2 Mars can reach 0.0 and 1.0 networks but not 2.0 network. I set up a tunnel as follows on Mars: ip tunnel add netb mode gre remote 172.16.0.1 local 172.16.0.2 ttl 255 ip link set netb up ip addr add 172.16.1.1 dev netb ip route add 172.16.2.0/24 dev netb When I ping 172.16.2.1 or 172.16.2.2, I get: PING 172.16.2.1 (172.16.2.1) from 172.16.1.1 : 56(84) bytes of data. From 172.16.1.1: Destination Host Unreachable From 172.16.1.1: Destination Host Unreachable Where am I going wrong? Please let me know. Thanks, Vikas ===="To remain cheerful and have equanimity in all circumstances is the greatest worship of God" __________________________________________________ Do You Yahoo!? LAUNCH - Your Yahoo! Music Experience http://launch.yahoo.com