Re: IMQ: why do I need IMQ ?

Linux Advanced Routing and Traffic Control

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In the case where you have a router (that is not generating signficant traffic itself) with one internet facing interface and one LAN facing interface, you really don't need IMQ.

It becomes very useful in alternate cases where, for example, you have multiple interfaces facing the internet (eg, two DSL connections). In this case the data coming into one of the internet facing interfaces no longer equals the amount of data exiting the LAN facing interface, so trying to control the internet ingress by policing the LAN egress is no longer a simple matter.

But yea, in the simple firewall/shaping router case, IMQ is generally not worth the time. Add multiple interfaces coming in our out, or add VPN to the ruoter, and it becomes a more complicated situation.

----- Original Message ----- From: "Radu CUGUT" <rcugut@xxxxxxxxx>
To: <lartc@xxxxxxxxxxxxxxx>
Sent: Sunday, April 10, 2005 11:14 AM
Subject: IMQ: why do I need IMQ ?



Hello there,

Can someone please explain why do one neeed IMQ ?

I can already shape incoming traffic on my nat router by creating
qdiscs on LAN-side interface. I have done some tests, whith simple
bandwidth limmiting, and it works.

I've read just about all the stuff on www.linuximq.net ... but
couldn't make myself an ideea on why would someone need IMQ for
ingress policing ...

Thanks in advance.

Have a nice day.




--


Radu Cugut

mobile: +40 742 045686
web:    http://rcugut.has.it
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