Just realised I'd sent this direct not via list... must remember to check address lines before sending in future. 2009/10/6 Richard Horton <arimus.uk@xxxxxxxxxxxxxx>: > 2009/10/6 Fabio Marcone <fabio.marcone@xxxxxxx>: > >> what kind of problems? What do you mean with "I switch to classid" ? >> > > Classid in this context I would assume to mean using the diff serv > code point field (was the ToS field) in the IP Header and making > queuing decisions based on the diffserv value rather than using > marking in the packet structure. > > If you use Classid there are two routes you can go do; > > Route 1 uses 'class selectors' and provides 8 levels of discrimination. > Route 2 goes down the full diffserv path and provides 3 levels of > traffic - Expedited forwards, Assured Forwarding and 'Best' Effort > (which is anything but best). > > The EF class is designed for real-time jitter (variation of delay) > sensitive traffic, AF is designed for loss-intolerant traffic and > provides 4 levels of forwarding each with 3 levels of drop precedence > and BE is well... whatever is left over. > > Using the AFxy (x class, y drop precedence) you can define some > complex schemes with each class having a guaranteed bandwidth with > packets being dropped on the basis of their drop precedence... > > > For instance to mark rtp and give it decent bandwidth/priority and sip > slightly lower... > > (Using port 20000/20001 for rtp, 5060 for sip) > iptables -A INPUT -t mangle -p udp -dport 5060 -j DSCP --set-dscp-class AF41 > iptables -A INPUT -t mangle -p udp -dport 20000 -j DSCP --set-dscp-class EF > iptables -A INPUT -t mangle -p udp -dport 20001 -j DSCP --set-dscp class EF > > tc qdisc add dev eth0 root handle 1: htb default 10 > tc class add dev eth0 classid 1:10 parent 1: htb rate 10mbps ceil 10mbps prio 10 > tc class add dev eth0 classid 1:20 parent 1: htb rate 30mbps ceil 40mbps prio 5 > tc class add dev eth0 classid 1:30 parent 1: htb rate 60mbps ceil 100mbps prio 0 > > tc filter add dev eth0 parent 1:0 protocol ip prio 10 u32 \ > match ip tos 0x88 0xff flowid 1:20 > tc filter add dev eth0 parent 1:0 protocol ip prio 10 u32 \ > match ip tos 0xB8 0xff flowid 1:30 > > > > -- > Richard Horton > Users are like a virus: Each causing a thousand tiny crises until the > host finally dies. > http://www.solstans.co.uk - Solstans Japanese Bobtails and Norwegian Forest Cats > http://www.pbase.com/arimus - My online photogallery > -- Richard Horton Users are like a virus: Each causing a thousand tiny crises until the host finally dies. http://www.solstans.co.uk - Solstans Japanese Bobtails and Norwegian Forest Cats http://www.pbase.com/arimus - My online photogallery -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
