Hi Tapas Das, > ioctl: No such device [here is the error] > Error while executing /sbin/ip > Command: /sbin/ip tunnel add sit1 mode sit ttl 64 remote 206.123.31.114 > Closing, exit status: 0 > Exiting with return code : 0 (0 = no error) modprobe ipv6 Cheers, --jochen