LARTC - Aug 2003 - Need a experience eyes on my script

Hi,


I used examples I found on this newsgroup and I made the script below.


I have 100 mbits to the internet (eth1) and I need tree qdics :
interactive, normal and slow.


Questions :

With the changes I made for the original examples...(300 kbits)

1) is my prio OK


2) is my rate OK


3) is my burst OK


4) What is the best technique (efficience) : TOS, mark  because I
included both in this script and I want to pick one



Thank you !
This newsgroup is very usefull


Yves Bergeron



------------------------------------------------------------------------


#!/bin/bash -x


        UPLINK=95000
        DEV=eth1


        iptables -t mangle -F
        tc qdisc del dev $DEV root    2> /dev/null > /dev/null


        # creation de la queue root
        tc qdisc add dev $DEV root handle 1: htb default 20
        tc class add dev $DEV parent 1: classid 1:1 htb rate ${UPLINK}kbit burst
6k


        # la classe de haute priorite 1:10 : (interactif)
        tc class add dev $DEV parent 1:1 classid 1:10 htb rate ${UPLINK}kbit \
           burst 6k prio 1


        # la classe en deuxieme priorite 1:20 c''est le defaut
        tc class add dev $DEV parent 1:1 classid 1:20 htb rate
$[9*$UPLINK/10]kbit \
           burst 6k prio 2


        # la classe en basse priorite 1:30 (services trop gourmands)
        tc class add dev $DEV parent 1:1 classid 1:30 htb rate 600 kbit \
           burst 4k prio 3


        # les trois classes sont gerees par SFQ :
        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
        tc qdisc add dev $DEV parent 1:30 handle 30: sfq perturb 10




        ########## utilisation de fw ##########################


        # utilisation des mark de iptables (port 3389)


        iptables -t mangle -A PREROUTING -p tcp -m multiport --sport 3389 -j
MARK --set-mark 0x1
        iptables -t mangle -A PREROUTING -p tcp -m multiport --sport 3389 -j
RETURN


        tc filter add dev $DEV parent 1:0 protocol ip prio 1 handle 1 fw classid
1:10





        ########## utilisation de TOS et u32 ####################


        # le bit Delai Minimum du champ TOS (ssh, etc... )


        iptables -t mangle -A PREROUTING -p tcp -m multiport --sport 53,23,22 -j
TOS --set-tos 16
        iptables -t mangle -A PREROUTING -p tcp -m multiport --sport 53,23,22 -j
RETURN


        iptables -t mangle -A OUTPUT -p tcp -m multiport --dport 53,23,22 -j TOS
--set-tos 16
        iptables -t mangle -A OUTPUT -p tcp -m multiport --dport 53,23,22  -j
RETURN


        tc filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \
              match ip tos 0x10 0xff  flowid 1:10




        ########## utilisation de u32 et triplets ###############


        # on place une adresse dans le flow de punition
        tc filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \
              match ip src x.x.x.x/x flowid 1:30


        # le web
        tc filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \
              match ip dport 80 0xffff flowid 1:10


        # ICMP (ip protocol 1) est dirige vers la classe interactive 1:10
        tc filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \
                match ip protocol 1 0xff flowid 1:10


        # pour accelerer les telechargements vers l''aval lors de la
presence d''un
        # flux montant, les paquets ACK sont places dans la classe interactive :
        tc filter add dev $DEV parent 1: protocol ip prio 10 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


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On Saturday 30 August 2003 16:37, Yves Bergeron wrote:
> Hi,
>
> I used examples I found on this newsgroup and I made the script below.
> I have 100 mbits to the internet (eth1) and I need tree qdics :
> interactive, normal and slow.
>
> Questions :
>
> With the changes I made for the original examples...(300 kbits)
> 1) is my prio OK
Yes and no.  Different prio''s can be OK.  The packets of a low prio
class will
be transmitted first.  But if that class contains more traffic then the 
configured rate, the latency will become very high.
> 2) is my rate OK
No.  The sum of the rates of your child class should be equal or smaller then 
the rate of the parent class.  And you didn''t specified the ceil.  So
ceil =
rate.
> 3) is my burst OK
No.  Too low.  Just remove the burst and htb will calculate the smallest one 
for you.
> 4) What is the best technique (efficience) : TOS, mark  because I
> included both in this script and I want to pick one
You can use both.  It depends on what you want to filters.  You can use both 
without any conflicts. 

Stef

-- 

stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.oftc.net

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