Fedora Linux doesn't show route cache entries

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http://serverfault.com – i'm playing with ip command and today i saw my fedora 16 doesn't show the routing cache information after i did a connection to a host, on centos 5 and on suse 10,11 i have no problem if i use the command ip route show cache or route -Cen, my kernel version is 3.6.11-4.fc16.i686 I would like to know if it's something related with kernel version or if it's a fedora problem command utilities. (HowTos)