On Tuesday 13 January 2004 4:15 pm, Wouter Coppens wrote: > Hi, > > I can't get traffic shaping working. > > This is my situation: > > > -------- ------ > Net1 ----- |router| -------------------- | TC | ----------- Net2 > -------- leased line ------ > > eth1 eth0 > > We use the leased line for normal traffic but also for synchronisation > between 2 servers. The leased line is 2mbit. The synchronisation > generates too much traffic and uses completely the 2mbit capacity of the > leased line. This is no problem during night, but we want to limit the > synchronisation traffic during day (or in other words: the sync-traffic > should get the lowest priority and the other traffic can use up to > 2mbit). > > According to the documentation, you can only shape outgoing traffic. We > took a PC (named TC) and put the network interfaces in bridge mode. > The synchronisation happens from Net1 to Net2, so TC is after the leased > line. > Normally you would shape the outgoing traffic on eth0, but this doesn't > work. We even tried to limit eth0 to 20kbit, but the synch-traffic > completely fills the leased line and no other traffic gets through. > > We found a temporary fix by using IMQ with iptables: > /sbin/tc qdisc del root dev imq0 > /sbin/tc qdisc add dev imq0 root handle 1: htb default 20 > /sbin/tc class add dev imq0 parent 1: classid 1:1 htb rate 2Mbit burst > 6k > /sbin/tc class add dev imq0 parent 1:1 classid 1:10 htb rate 64kbit ceil > 787kbit > /sbin/tc class add dev imq0 parent 1:1 classid 1:20 htb rate 2Mbit > /sbin/tc qdisc add dev imq0 parent 1:10 handle 10: sfq perturb 10 > /sbin/tc qdisc add dev imq0 parent 1:20 handle 20: sfq perturb 10 > /sbin/tc filter add dev imq0 parent 1: protocol ip prio 18 u32 match ip > dst 10.10.10.10 flowid 1:10 (10.10.10.10 is ip of server in Net2). > > > Is there a better way to give the sync-traffic the lowest priority? If > somybody starts a download it should get 2mbit and the sync-traffichttp > should get the rest (if any). > > We would like to upgrade to 2.6, but imq is not maintained. Any help? IMQ has been ported to 2.6 http://www.digriz.org.uk/jdg-qos-script/ Andy. _______________________________________________ LARTC mailing list / LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
