Network testing and latency

[Kevin D. Clark]

Paul Lussier writes:

> I initially thought of connecting the GigE cards to a 10MB hub, but
> that's not really the same thing, and is still almost an order of
> magnitude faster than a T1.  I vaguely remember hearing about
> something that ran on linux that lets you tune the box to introduce
> variable amounts of latency into a connection, but can't remember what
> it is or where I saw it.

Do you want to introduce latency or jitter?  These are very different
things.

If all that you want to do is to introduce latency, I would suggest
using iptables "dstlimit" and "fuzzy" modules.

If you want to introduce jitter, then you'll need to introduce some
randomness to the network.  This might be as simple as running
bittorrent for some popular file...

Regards,

--kevin
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