Hello, Perhaps I am mising something; I am trying to implement a hashing filter nearly identical to that outlined in the iproute2 docs at http://www.opens.com.br/documentacao/IPRoute2/lartc.adv-filter.hashing.html However, I dont get very far because I get "invalid argument" whenever I issue any filtering commands, eg: [root@localhost root]# tc filter add dev eth1 parent 1:0 prio 5 protocol ip u32 RTNETLINK answers: Invalid argument This is obviously bothersome :) I am using RedHat linux 9.0 with (stock) kernel ver 2.4.20. Any help would be appreciated as always! Thanks, Paul