Re: Tuning Gigabit

From: Nick Evans (nevans_at_talkpoint.com)
Date: 08/13/03

  • Next message: Eric Anderson: "Re: Tuning Gigabit" 
    Date: Wed, 13 Aug 2003 14:26:15 -0400
To: freebsd-performance@freebsd.org

    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.

    Nick

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

    > >>>>> "Eric" == Eric Anderson <anderson@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@velocet.net | equal if and only if they |
    > |http://daveg.ca | are precisely opposite. |
    > =========================================================GLO================
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