124 lines
3.6 KiB
Plaintext
Executable File
124 lines
3.6 KiB
Plaintext
Executable File
iproute2+tc*
|
|
|
|
It's the first release of Linux traffic control engine.
|
|
|
|
|
|
NOTES.
|
|
* csz scheduler is inoperational at the moment, and probably
|
|
never will be repaired but replaced with h-pfq scheduler.
|
|
* To use "fw" classifier you will need ipfwchains patch.
|
|
* No manual available. Ask me, if you have problems (only try to guess
|
|
answer yourself at first 8)).
|
|
|
|
|
|
Micro-manual how to start it the first time
|
|
-------------------------------------------
|
|
|
|
A. Attach CBQ to eth1:
|
|
|
|
tc qdisc add dev eth1 root handle 1: cbq bandwidth 10Mbit allot 1514 cell 8 \
|
|
avpkt 1000 mpu 64
|
|
|
|
B. Add root class:
|
|
|
|
tc class add dev eth1 parent 1:0 classid 1:1 cbq bandwidth 10Mbit rate 10Mbit \
|
|
allot 1514 cell 8 weight 1Mbit prio 8 maxburst 20 avpkt 1000
|
|
|
|
C. Add default interactive class:
|
|
|
|
tc class add dev eth1 parent 1:1 classid 1:2 cbq bandwidth 10Mbit rate 1Mbit \
|
|
allot 1514 cell 8 weight 100Kbit prio 3 maxburst 20 avpkt 1000 split 1:0 \
|
|
defmap c0
|
|
|
|
D. Add default class:
|
|
|
|
tc class add dev eth1 parent 1:1 classid 1:3 cbq bandwidth 10Mbit rate 8Mbit \
|
|
allot 1514 cell 8 weight 800Kbit prio 7 maxburst 20 avpkt 1000 split 1:0 \
|
|
defmap 3f
|
|
|
|
etc. etc. etc. Well, it is enough to start 8) The rest can be guessed 8)
|
|
Look also at more elaborated example, ready to start rsvpd,
|
|
in rsvp/cbqinit.eth1.
|
|
|
|
|
|
Terminology and advices about setting CBQ parameters may be found in Sally Floyd
|
|
papers.
|
|
|
|
|
|
Pairs X:Y are class handles, X:0 are qdisc handles.
|
|
weight should be proportional to rate for leaf classes
|
|
(I choosed it ten times less, but it is not necessary)
|
|
|
|
defmap is bitmap of logical priorities served by this class.
|
|
|
|
E. Another qdiscs are simpler. F.e. let's join TBF on class 1:2
|
|
|
|
tc qdisc add dev eth1 parent 1:2 tbf rate 64Kbit buffer 5Kb/8 limit 10Kb
|
|
|
|
F. Look at all that we created:
|
|
|
|
tc qdisc ls dev eth1
|
|
tc class ls dev eth1
|
|
|
|
G. Install "route" classifier on root of cbq and map destination from realm
|
|
1 to class 1:2
|
|
|
|
tc filter add dev eth1 parent 1:0 protocol ip prio 100 route to 1 classid 1:2
|
|
|
|
H. Assign routes to 10.11.12.0/24 to realm 1
|
|
|
|
ip route add 10.11.12.0/24 dev eth1 via whatever realm 1
|
|
|
|
etc. The same thing can be made with rules.
|
|
I still did not test ipchains, but they should work too.
|
|
|
|
|
|
Setup and code example of BPF classifier and action can be found under
|
|
examples/bpf/, which should explain everything for getting started.
|
|
|
|
|
|
Setup of rsvp and u32 classifiers is more hairy.
|
|
If you read RSVP specs, you will understand how rsvp classifier
|
|
works easily. What's about u32... That's example:
|
|
|
|
|
|
#! /bin/sh
|
|
|
|
TC=/home/root/tc
|
|
|
|
# Setup classifier root on eth1 root (it is cbq)
|
|
$TC filter add dev eth1 parent 1:0 prio 5 protocol ip u32
|
|
|
|
# Create hash table of 256 slots with ID 1:
|
|
$TC filter add dev eth1 parent 1:0 prio 5 handle 1: u32 divisor 256
|
|
|
|
# Add to 6th slot of hash table rule to select tcp/telnet to 193.233.7.75
|
|
# direct it to class 1:4 and prescribe to fall to best effort,
|
|
# if traffic violate TBF (32kbit,5K)
|
|
$TC filter add dev eth1 parent 1:0 prio 5 u32 ht 1:6: \
|
|
match ip dst 193.233.7.75 \
|
|
match tcp dst 0x17 0xffff \
|
|
flowid 1:4 \
|
|
police rate 32kbit buffer 5kb/8 mpu 64 mtu 1514 index 1
|
|
|
|
# Add to 1th slot of hash table rule to select icmp to 193.233.7.75
|
|
# direct it to class 1:4 and prescribe to fall to best effort,
|
|
# if traffic violate TBF (10kbit,5K)
|
|
$TC filter add dev eth1 parent 1:0 prio 5 u32 ht 1:: \
|
|
sample ip protocol 1 0xff \
|
|
match ip dst 193.233.7.75 \
|
|
flowid 1:4 \
|
|
police rate 10kbit buffer 5kb/8 mpu 64 mtu 1514 index 2
|
|
|
|
# Lookup hash table, if it is not fragmented frame
|
|
# Use protocol as hash key
|
|
$TC filter add dev eth1 parent 1:0 prio 5 handle ::1 u32 ht 800:: \
|
|
match ip nofrag \
|
|
offset mask 0x0F00 shift 6 \
|
|
hashkey mask 0x00ff0000 at 8 \
|
|
link 1:
|
|
|
|
|
|
Alexey Kuznetsov
|
|
kuznet@ms2.inr.ac.ru
|