[Click] generating artificial delay

[Brecht Vermeulen]

Hi,

never tried this, but I guess it should work with some small 
modifications to your configuration:
FromDevice(eth0) -> Queue -> DelayUnqueue(0.100) -> ToHost(eth0)

(delay is in seconds, and the queue must be added so the packets can 
wait somewhere. DelayUnqueue instead of Delayshaper because ToHost is a 
push element)

let us know how it works.

What we tried was an impairment node (so an extra PC with two network 
cards in the middle) based on click, say
FromDevice(eth0) -> Queue -> DelayShaper(0.100) -> ToDevice(eth1);
and this works perfectly.

but never tried to delay packets and then hand them to the kernel itself.

regards,
Brecht



Simon Schuetz wrote:

> Hi,
> I am doing some network testings and I need a tool to generate some
> artificial delay on the intermediate router (lets say 100ms from
> incoming to outgoing) to simulate some sort of network. I need the
> support for Linux IPv6.
> Is it possible to do this using the click router (either userlevel or
> kernel modules) with a configuration like
> FromDevice(eth0) -> DelayShaper(100) -> ToHost(eth0) ??
> 
> If not, any other known tools that support such a scenario?
> (Dummynet is for BSD only, NISTnet does not support IPv6)
> 
> Thanks 
> Simon
> 
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