Traffic Control (tc) in Red Hat 9
Hi,
I am a linux newbie and I have been trying to setup tc control in linux. I want to bandwidth manage traffic going out from my internal network to the external Internet. I have setup a Linux router to achieve this and I can access the Internet from my private internal LAN. I have looked at a lot of docs regarding traffic control in Linux (including Linux 2.4 Advanced Routing How To) but I dont seem to be getting anywhere. Does anyone know any of any places where I can get help on this topic? So far I have been playing around with following commands but I have yet to notice any bandwidth shaping on my internal network: tc qdisc add dev eth0 root handle 1: htb default 12 tc class add dev eth0 parent 1: classid 1:1 htb rate 100kbps ceil 100kbps etc... Any help is appriciated! Thanks Dodger |
I found this script in the Adv-Routing Howto i think. It worked for me but only does traffic shaping on an interface not on a port. I think you may be able to alter it though. Simply change the variables for your UPLINK AND DOWNLINK speed and the interface you want to shape.
# Setup For Your Internet Connection At Home # # # Set the following values to somewhat less than your actual download # and uplink speed. In kilobitsv DOWNLINK=630 UPLINK=620 DEV=eth0 TC=/sbin/tc # clean existing down- and uplink qdiscs, hide errors $TC qdisc del dev $DEV root 2> /dev/null > /dev/null $TC qdisc del dev $DEV ingress 2> /dev/null > /dev/null ###### uplink # install root CBQ $TC qdisc add dev $DEV root handle 1: cbq avpkt 1000 bandwidth 10mbit # shape everything at $UPLINK speed - this prevents huge queues in your # DSL modem which destroy latency: # main class $TC class add dev $DEV parent 1: classid 1:1 cbq rate ${UPLINK}kbit \ allot 1500 prio 5 bounded isolated # high prio class 1:10: $TC class add dev $DEV parent 1:1 classid 1:10 cbq rate ${UPLINK}kbit \ allot 1600 prio 1 avpkt 1000 # bulk and default class 1:20 - gets slightly less traffic, # and a lower priority: $TC class add dev $DEV parent 1:1 classid 1:20 cbq rate $[9*$UPLINK/10]kbit \ allot 1600 prio 2 avpkt 1000 # both get Stochastic Fairness: $TC qdisc add dev $DEV parent 1:10 handle 10: sfq perturb 10 $TC qdisc add dev $DEV parent 1:20 handle 20: sfq perturb 10 # start filters # TOS Minimum Delay (ssh, NOT scp) in 1:10: $TC filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \ match ip tos 0x10 0xff flowid 1:10 # ICMP (ip protocol 1) in the interactive class 1:10 so we # can do measurements & impress our friends: $TC filter add dev $DEV parent 1:0 protocol ip prio 11 u32 \ match ip protocol 1 0xff flowid 1:10 # To speed up downloads while an upload is going on, put ACK packets in # the interactive class: $TC filter add dev $DEV parent 1: protocol ip prio 12 u32 \ match ip protocol 6 0xff \ match u8 0x05 0x0f at 0 \ match u16 0x0000 0xffc0 at 2 \ match u8 0x10 0xff at 33 \ flowid 1:10 # rest is 'non-interactive' ie 'bulk' and ends up in 1:20 $TC filter add dev $DEV parent 1: protocol ip prio 13 u32 \ match ip dst 0.0.0.0/0 flowid 1:20 ########## downlink ############# # slow downloads down to somewhat less than the real speed to prevent # queuing at our ISP. Tune to see how high you can set it. # ISPs tend to have *huge* queues to make sure big downloads are fast # # attach ingress policer: $TC qdisc add dev $DEV handle ffff: ingress # filter *everything* to it (0.0.0.0/0), drop everything that's # coming in too fast: $TC filter add dev $DEV parent ffff: protocol ip prio 50 u32 match ip src \ 0.0.0.0/0 police rate ${DOWNLINK}kbit burst 10k drop flowid :1 |
Thanks Fataldata...I'll giv dat a try..
Thanks Dodger |
All times are GMT -5. The time now is 10:48 AM. |