Hi, For Ethernet and others, we have a configuration file inside /etc/sysconfig/newtork-script/ like ifcfg-ethx where we specify ip address, mask, type etc... For GRE tunneling, how can I specify the parameters for tunneling device, so that I ifup-tunnel will automatically read and start the interface and I don't have to write the below scripts in my start-up file. ip tunnel add netx mode gre remote 69.77.7.7 local 192.168.0.1 ttl 255 ip addr add 192.168.0.1 dev netx