tc.1.txt
changeset 1 840aebd2e31e
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tc.1.txt	Thu May 15 19:00:38 2008 +0200
@@ -0,0 +1,44 @@
+Traffic control
+
+Classless pfifo_fast
+-------------
+3 bands. This means three fifos. 0 prioritized over 1, 1 over 2.
+The kernel puts the packets into the fifos according to TOS.
+classless
+
+Classless Tocken Bucket Filter (tbf)
+--------------
+limit: max number of bytes waiting for tokens
+
+latency: max time the bytes may wait for tokens (sets limit)
+
+burst/buffer/maxburst: size of the bucket in bytes.
+
+mpu: minimal token usage for a packet
+
+rate: speedknob?
+
+peakrate: The peakrate can be used to specify how quickly the bucket is
+allowed to be depleted. If doing everything by the book, this is achieved by
+releasing a packet, and then wait just long enough, and release the next. We
+calculated our waits so we send just at peakrate.
+
+mtu/minburst: A higher peakrate is possible by sending out more packets per
+timertick, which effectively means that we create a second bucket!. To calculate the maximum possible peakrate, multiply the configured mtu by 100
+(or more correctly, HZ, which is 100 on Intel, 1024 on Alpha).
+
+Classless Stochastic Fairness Queueing
+-------------------------------
+perturb: Reconfigure hashing once this many seconds.
+
+
+HTB (Hierarchic Token Bucket)
+-------------------------------
+All packets go to the class 1:1
+tc qdisc add dev eth1 root handle 1: htb default 1
+
+The class:
+tc class add dev eth1 parent 1: classid 1:1 htb rate 20kbps ceil 20kbps 
+
+A SFQ qdisc for that rate limited class, so all connections get fair traffic
+tc qdisc add dev eth0 parent 1:1 handle 40: sfq perturb 10