[Netkit.users] Netem on netkit

[Massimo Rimondini]

Thank you Csaba for the contribution.

Detailed instructions for the compilation can also be found in the
kernel README file: http://wiki.netkit.org/download/netkit-kernel/README

Regards,
Massimo.


Csaba Kiraly wrote:
> it is also quite easy to compile your own kernel for netkit. I don't 
> know whether it is in the faq or not, but basically what you need is to
> compile a kernel for the "um" architecture with the configiuration file 
> mentioned below.
>
> make "ARCH=um"
>
> don't forget  to add ARCH=um for all your make commands, even 
> configuration ones, otherwise you will mix up architectures.
>
> Then, you just have to redirect netkit links to the exexutable and to 
> the modules folder, and there you go!
>
> Csaba
>
>
> Massimo Rimondini wrote:
>   
>> Dear Giovambattista,
>>
>> try using the same command but replacing the tc executable with "orig-tc".
>> Netem is actually compiled in the current Netkit kernel. You can check
>> it in the configuration file available online
>> (http://wiki.netkit.org/download/netkit-kernel/netkit-kernel-config-i386-K2.8)
>> or inside a virtual machine:
>>
>>   
>>     
>>> pc1:~# zgrep NETEM /proc/config.gz
>>> CONFIG_NET_SCH_NETEM=y
>>>     
>>>       
>> However, there seem to be problems with some iproute commands that are
>> imported from the MPLS Linux project. That is why we also provide their
>> original releases from Debian packages, with their name prefixed by "orig-".
>>
>> Hope this helps.
>>
>> Regards,
>> Massimo.
>>
>>
>> Giovambattista Ianni wrote:
>>   
>>     
>>> Dear all,
>>>
>>> I had in mind to do some delay+packet loss simulation using netkit, so I started 
>>> issuing some netem command in virtual machines, like:
>>>
>>> tc qdisc add dev eth0 root netem delay 100ms
>>>
>>> but, what I get is:
>>>
>>> Unknown qdisc "netem", hence option "delay" is unparsable
>>>
>>> Apparently netem is not compiled in the netkit kernel: I'm using a freshly 
>>> downloaded netkit copy with a "2.6.26.5-netkit-K2.8 (max a brunello) (gcc version 
>>> 4.3.3 (Debian 4.3.3-13)" kernel on it.
>>>
>>> Massimo reports that netem should be available in netkit:
>>> http://list.dia.uniroma3.it/pipermail/netkit.users/2008-May/000353.html
>>>
>>> but there is something wrong: is netem actually in? is there a way to enable it?
>>> should I modprobe some additional module? has netem perhaps a different qdisc 
>>> name? (it was 'delay' in old kernels but this doesn't work)
>>>
>>> regards, gb
>>>
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>>>   
>>>     
>>>       
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