[LARTC] Help Needed

[LARTC] Help Needed

[Vishal Malhan]

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Hello All,
    I need to gather some material on bandwidth management for a VLAN. Can anyone give any pointers on the same or some useful material that i can get on that. Are there any implementations available for the same ?

Thanks in advance,

Rgds,
Vishal Malhan

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[LARTC] Help needed

[Fernando del Valle]

Hi,

I have a Squid proxy connected to the Internet by ADSL which serves a small
LAN.

                [ ADSL ] -- [(ppp0) PROXY (eth1)] -- [LAN 192.168.0.0/24]
Shaped: (0.0.0.0/0) ---> -------------------------> --> ------------>
Unshaped:
                                   (squid) -----> --> ------------>

I've set up traffic shaping using CBQ by IP on eth1. But it shapes ALL the
traffic sent over local Ethernet, and I'd like to keep proxy traffic which
didn't came from ppp0 unshaped. I marked with iptables everything that comes
from ppp0, but I can't get it to work with both filters (by handle and by
IP). I don't realise how should I create the structure of classes. Anyway,
it might be enough to leave traffic from ports 80 and 3128 unshaped, but how
can I do it? I browsed the documentation (and googled) and I couldn't
determine:


a) if more than one filter can be attached to a class;
b) if all filters sharing a class are parsed or the first match exits;
c) if all subclasses of a class are parsed or the first match exits.

I know these are simple questions, but as a newbie I'm pretty stuck in here.
With answers to a), b) and c) I should be able to configure it by myself.
Anyway, a short sample would be appreciated.

Thanks in advance,

Fernando del Valle

P.S.: Please excuse my poor english :(

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Re: [LARTC] Help needed

[Esteban Ribicic]

i've say you have a iptables/u32 understanding than a cbq/htb or
whatever i think..

a) yes
b) its secuentially "readed"...if none match is applyed, you can have a
default iptables/u32 rule for example..-s 0/0 -d myip 
c) i dont understand the question, maybe somenoe else can help you.

docum.org and lartc.org have plenty of examples
good luck (suerte flaco)


On Sat, 2003-04-05 at 11:52, Fernando del Valle wrote:
> Hi,
> 
> I have a Squid proxy connected to the Internet by ADSL which serves a small
> LAN.
> 
>                 [ ADSL ] -- [(ppp0) PROXY (eth1)] -- [LAN 192.168.0.0/24]
> Shaped: (0.0.0.0/0) ---> -------------------------> --> ------------>
> Unshaped:
>                                    (squid) -----> --> ------------>
> 
> I've set up traffic shaping using CBQ by IP on eth1. But it shapes ALL the
> traffic sent over local Ethernet, and I'd like to keep proxy traffic which
> didn't came from ppp0 unshaped. I marked with iptables everything that comes
> from ppp0, but I can't get it to work with both filters (by handle and by
> IP). I don't realise how should I create the structure of classes. Anyway,
> it might be enough to leave traffic from ports 80 and 3128 unshaped, but how
> can I do it? I browsed the documentation (and googled) and I couldn't
> determine:
> 
> 
> a) if more than one filter can be attached to a class;
> b) if all filters sharing a class are parsed or the first match exits;
> c) if all subclasses of a class are parsed or the first match exits.
> 
> I know these are simple questions, but as a newbie I'm pretty stuck in here.
> With answers to a), b) and c) I should be able to configure it by myself.
> Anyway, a short sample would be appreciated.
> 
> Thanks in advance,
> 
> Fernando del Valle
> 
> P.S.: Please excuse my poor english :(


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Re: [LARTC] Help needed

[Stef Coene]

On Saturday 05 April 2003 16:52, Fernando del Valle wrote:
> Hi,
>
> I have a Squid proxy connected to the Internet by ADSL which serves a small
> LAN.
>
>                 [ ADSL ] -- [(ppp0) PROXY (eth1)] -- [LAN 192.168.0.0/24]
> Shaped: (0.0.0.0/0) ---> -------------------------> --> ------------>
> Unshaped:
>                                    (squid) -----> --> ------------>
>
> I've set up traffic shaping using CBQ by IP on eth1. But it shapes ALL the
> traffic sent over local Ethernet, and I'd like to keep proxy traffic which
> didn't came from ppp0 unshaped. I marked with iptables everything that
> comes from ppp0, but I can't get it to work with both filters (by handle
> and by IP). I don't realise how should I create the structure of classes.
> Anyway, it might be enough to leave traffic from ports 80 and 3128
> unshaped, but how can I do it? I browsed the documentation (and googled)
> and I couldn't determine:
So you want proxied traffic unshaped.  You can use the source address.  All 
traffic from ip-address = eth1 is local traffic , all other traffic is 
internet traffic.  The only problem is proxy traffic.  Because you don't know 
if the traffic came from ppp0 or it was fetched form the proxy cache.  You 
can mark the packets coming in from ppp0, but the mark is lost when the 
packet enters the proxy.

> a) if more than one filter can be attached to a class;
Yes you can.  They are ordered based on prio.
> b) if all filters sharing a class are parsed or the first match exits;
As soon as a filter matches, the packet is sended to the destination of the 
filter.

> c) if all subclasses of a class are parsed or the first match exits.
I'm not sure what you want to say.  But if a packet enters a class, all 
filters are tested.  If a filter matches, the packet is send to the 
destination class.  And if that class is not a leaf class (it has child 
classes), the filters attached to that class are tested again.  This goes on, 
untill the packet ends up in a class with not child classes (a leaf class).

Stef

-- 

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

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