Tuning Gigabit

Nick Evans nevans at talkpoint.com
Wed Aug 13 11:26:59 PDT 2003

I'm currently forwarding 700 megabits (1500 byte packets, netperf generated) , ~95K pps, with 254 ipfilter rules. The system is running at ~30% idle. I'm also running freevrrpd so the two units I have are fault tolerant with a 3 second failover time. Still tuning, more to come later.


On Thu, 3 Jul 2003 16:09:35 -0400
David Gilbert <dgilbert at velocet.ca> wrote:

> >>>>> "Eric" == Eric Anderson <anderson at centtech.com> writes:
> Eric> What would be a good initial start hardware-wise?
> To start testing this type of setup (gigabit routing), you'd need a
> vlan'able switch with many gigabit ports, and then for each test you
> need:
> 1 or more packet generators (one interface each)
> 1 router (two interfaces)
> 1 or more victims (one interface each)
> For bidirectional packet passing tests, it's best to have two (or
> more) generators and 2 or more victims.  The victims generally have
> the least load and are good places to measure actual traffic passed.
> It's a good idea to have serial (or other) console on each of these
> machines as livelock is not uncommon.  There are also useful
> statistics you can collect from the console that you can't always get
> from the network login ... because the near-livelock conditions may
> not give you enough updates.
> It is also sometimes a good idea to have a 100meg card in the boxes
> for OOB management.
> Multiply this times the number of tests you want to do.  We find that
> you get about one test every two hours total work (much tearing down
> and building up of machines inbetween included in that estimate).
> Dave.
> -- 
> ============================================================================
> |David Gilbert, Velocet Communications.       | Two things can only be     |
> |Mail:       dgilbert at velocet.net             |  equal if and only if they |
> |http://daveg.ca                              |   are precisely opposite.  |
> =========================================================GLO================
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