Re: [LARTC] marking

[Stef Coene <stef.coene@docum.org>]

On Tuesday 28 January 2003 04:55, Jay Wineinger wrote:
> > It's not clear to me how your setup look like and what you want to do.
> >
> > Stef
>
> Ok, what I want to do is setup 4 or 5 classes for traffic headed out my
> external interface(eth0).  They should be something like interactive (icmp,
> ssh, etc), mail (smpt,pop,imap), web (http/https), and bulk.   My problem
> right now is figuring out the correct configuration so that I do not limit
> traffic that is only destined FOR the QoS box, which also does DHCP, nat,
> samba, etc for the internal nat'd subnet (eth1).  I also run a squid
> caching proxy server for the network's http/https connections.
>
> Im having trouble figuring where the correct place to mark each packet
> would be. Do i need to do some in -t mangle PREROUTING or INPUT or FORWARD?
>  Im confused as to how to differentiate between packets destined for the
> outside world (out eth0) and those that are staying on the internal
> network.
Maybe the KPTD on www.docum.org can help you to figure out where you can mark 
the packets.

> This is what Ive pulled out of my butt for my qdisc setup:
>
> # Create new root qdisc on eth1 and parent for everything
> $TC qdisc add dev eth1 root handle 1: htb default 2022
> $TC class add dev eth1 parent 1: classid 1:1 htb rate 95mbit ceil 95mbit
>
> # Create parent class for outbound
> $TC class add dev eth1 parent 1:1 classid 1:10 htb rate 350kbps burst 2k
> ceil 350kbps
>   # Create subclasses on outbound traffic for interactive,mail,www,bulk
>   $TC class add dev eth1 parent 1:10 classid 1:101 htb rate 50kbps burst 2k
> prio 0    [interactive]
>   $TC class add dev eth1 parent 1:10 classid 1:102 htb rate 50kbps burst 2k
> prio 1    [mail]
>   $TC class add dev eth1 parent 1:10 classid 1:103 htb rate 50kbps burst 5k
> prio 2    [ www is limited farther upstream anyway =(   ]
>   $TC class add dev eth1 parent 1:10 classid 1:104 htb rate 70kbps burst 2k
> prio 3 ceil 125kbps    [bulk]
>
> # Create parent class for internal subnet traffic
> $TC class add dev eth1 parent 1:1 classid 1:20 htb rate 60mbit ceil 90mbit
>   # Create subclasses on internal traffic for interactive and bulk traffic
>   $TC class add dev eth1 parent 1:20 classid 1:201 htb rate 150kbps burst
> 2k prio 0    [local interactive]
>   $TC class add dev eth1 parent 1:20 classid 1:202 htb rate 50mbit prio 1
> ceil 55mbit
>     # Create subclasses on internal bulk traffic (1:202) for www and other
>     $TC class add dev eth1 parent 1:202 classid 1:2021 htb rate 25mbit prio
> 0    [local webserver traffic]
>     $TC class add dev eth1 parent 1:202 classid 1:2022 htb rate 25mbit prio
> 1    [bulk]
>
> Am i going about this all wrong?
No.  
But I have some remarks.  Since you don't specify the ceil parameter, ceil = 
rate.  So the classes can't borrow unused bandwidth to each other.  Is that 
what you want?  (see classes 101, 102, 103, 104).

Stef

-- 

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

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