This network is too good...

Thomas Maufer tmaufer at gmail.com
Wed Feb 1 21:05:24 CST 2012


IWL's "Maxwell" is probably what you want:

http://www.iwl.com/press-releases/new-capabilities-for-maxwell-the-network-impairment-system.html

Good luck breaking stuff!





On Wednesday, February 1, 2012, Leo Bicknell <bicknell at ufp.org> wrote:
> In a message written on Wed, Feb 01, 2012 at 08:51:13PM -0500, Robert E.
Seastrom wrote:
>> Any thoughts on products that screw up networks in deterministic (and
>> realistic found-in-the-wild) ways?  I'm thinking of stuff like
>> PacketStorm, Dummynet, etc.  Dial up jitter, latency, tail drop, RED,
>> whatever...
>>
>> (I know someone's gonna say "Just buy a Brand Z FubarSwitch 3k, they
>> will screw up your whole network and you don't even have to configure
>> it to do so!")
>
> The only good L2 solutions I've ever seen are expensive commercial
> testing.  DummyNet, on a L3 aware FreeBSD box is extremely useful and
> easy to configure to simulate varous loss or latency patterns.
>
> What tool is right depends on if you want to test at L2 (simulate a
> circuit/cable with a particular problem) or L3 (just a router in the
> middle dropping packets), or testing an end user application.  L2,
> particularly if you want to simulate things like a duplex mismatch is
> hard, and not often needed.
>
> If your goal is to test applications against network conditions, OSX has
> a nifty new tool, "Network Link Conditioner".  It's basically just
> dummynet with various throughput, delay, and packet loss settings but it
> makes it dead simple to select from various pull downs.
>
>
http://www.thegeeksclub.com/simulate-internet-connectivity-speed-mac-os-lion-107-network-link-conditioner
>
> I bring it up mainly because if you want to set your own DummyNet
> settings for other testing it's a nice database of average case
> performance for a number of link types!
>
> --
>       Leo Bicknell - bicknell at ufp.org - CCIE 3440
>        PGP keys at http://www.ufp.org/~bicknell/
>

-- 

~tom

+1 408 890-7548 (Google Voice)


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