From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Worthington Date: Wed, 05 Nov 2003 12:34:20 +0000 Subject: [LARTC] Does -j TOS actually do anything? Message-Id: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org Very simple setup: I have several machines, one of which (192.168.0.198) is used exclusively as a vnc client to a remote site. I want it to get priority over guff like email and web etc. tc qdisc add dev eth1 root handle 1: prio tc qdisc add dev eth1 parent 1:1 handle 10: pfifo tc qdisc add dev eth1 parent 1:2 handle 20: pfifo tc qdisc add dev eth1 parent 1:3 handle 30: pfifo iptables -t mangle -I OUTPUT -p icmp -s 192.168.0.198 -j TOS --set-tos 16 Effect: zero. All the vnc traffic from x.198 goes into 1:2. I've tried all the tables (PREROUTE etc) to no avail. I even tried applying the TOS change to ALL traffice bound for eth1 (the outside line) and still saw no change in the queuing despite tcpdump showing that the tos bits were being set. Why does this not work? It seems as if the priority is being set before iptables' mangle rules are applied. Thomas Worthington -- Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/ _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/