Google shows me a number of responses that all tell me to add a line to /etc/sysconfig/network
which I already had.
[rkampen@timsws network-scripts]$ cat /etc/sysconfig/network NETWORKING=yes HOSTNAME=timsws GATEWAY=192.168.1.1
You should remove line 'GATEWAY..' as DHCP usually gives it. Try also upgrading dsl router to latest firmware.
-- Eero