I always configure my system statically. I have seen special articles 
on getting DHCP to work with Cox, apparently it is non-standard in some 
way (?). 

BTW, that network mask looks odd to me:

24.1.248.0      0.0.0.0         255.255.248.0   U         0 0          0

Most commonly it would be 255.255.255.0, but Cox told me that mine 
would be 255.255.255.128, and that works fine. Try setting it to 
255.255.255.128.

-- 
Pete Buechler
Developer, SuSE Labs
peterb@suse.com
http://www.suse.com/~peterb