This network is too good...

Thomas Maufer tmaufer at
Thu Feb 2 03:05:24 UTC 2012

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

Good luck breaking stuff!

On Wednesday, February 1, 2012, Leo Bicknell <bicknell at> 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.
> 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 - CCIE 3440
>        PGP keys at



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