Re: Testing Qos with Dynamips

google is your friend molomo, start from here:
http://www.blindhog.net/cisco-dynamips-with-linux-loopback-tap-interface/

follow those instructions, after creating the tap interface on you
system, connect it to
dynamips devices:

[[Router SW2]]
                model = 3640
                autostart = False
                slot0 = NM-16ESW
                F0/0 = SW1 F0/0
                F0/1 = SW1 F1/0
                F0/2 = SW1 F2/0
                F0/9 = NIO_tap:tap0

in that case, the tap0 interface of your system can be pingable from
the f0/9 interface, and from
all your virtual network. f0/9 and tap0 of course they should be part
of the same subnet.

Install an http server like mini-httpd (or the one you prefer) and
make it listening on the tap interface.
on the root directory where the httpd server is, put a big file of the
size you need, then you can copy
it as for: copy http:://1.2.3.4/big_file.txt null:

/R

2009/7/17 Molomo <letjedilakopa_at_gmail.com>:
> Federico,
> Thanks for the prompt response....I'm using GNS3 on Ubuntu 8.10 _Intrepid
> Ibex_, do you know how I can implement solution two?
> I'm still novice when on linux.
>
> Molomo
>
>
> On Fri, Jul 17, 2009 at 11:50 AM, Federico Cossu <federico.cossu_at_gmail.com>
> wrote:
>>
>> hi molomo,
>> i faced the same problem and what i can tell you is that you can't
>> without some hard work.
>> moreover, i've got some strange behavior when using *ip sla* checks
>> described here:
>>
>> http://7200emu.hacki.at/viewtopic.php?t=7442&start=0&postdays=0&postorder=asc&highlight=
>>
>> 1) anyway, for moving large files via http you can use the 3725
>> platform instead of 3640,
>> because there you can find a large flash: space where to store larger
>> files.
>>
>> 2) you can also connect you virtual routers to a virtual interface on
>> your system, attach an http server
>> to this virtual interface and let it listening on, i've used
>> mini-httpd and it works well.
>>
>> i did not practiced solution 1) but i've read somewhere it should work
>> fine,
>> 2) works fine too but it's a little more complicated even if makes you
>> move files of any size you need.
>>
>> /R
>>
>>
>>
>> 2009/7/17 Molomo <letjedilakopa_at_gmail.com>:
>> > Group,
>> > I'm using dynamips for my prepartions, I have one challenge with testing
>> > QoS, I cannot copy ios image between routers and hence cannot test
>> > policing
>> > or shaping. I can copy dhcp database but it is not big enough to cause
>> > congestion on my serial links.
>> >
>> > Anyone had similar challenge and how did you overcome it?
>> >
>> > Rgds,
>> > Molomo
>> >
>> >
>> > Blogs and organic groups at http://www.ccie.net
>> >
>> > _______________________________________________________________________
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>> >
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>> >
>> >
>> >
>> >
>> >
>>
>>
>>
>> --
>> Faeddare pagu, sabidorla meda.
>
>

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