Re: FreeBSD, quagga (BGP) and 2950 VLANs

From: Daniel Po*** (daniel_at_lvdx.com)
Date: 09/20/05

  • Next message: Chuck Swiger: "Re: FreeBSD, quagga (BGP) and 2950 VLANs" 
    Date: Tue, 20 Sep 2005 00:08:55 +0100
To: freebsd-isp@freebsd.org

    Kurt Jaeger wrote:

    >Hi!
    >
    >
    >
    >>>Doing a straight FTP transfer from one server to another
    >>>through a CIsco 3640 seems to cap at about 40 Mbits/second so I was
    >>>wondering how that compares to a x86 system running FreeBSD.
    >>>
    >>>
    >>The tests I made using some shuttle.com barebone hardware etc
    >>seems to max out around 500 mbit/sec. It wasn't a full-blown BGP setup,
    >>far from it. More seems easily be possible, but we still need
    >>to test.
    >>
    >>
    >
    >If you use ftp, the limit might be the IO from/to disk, not the cisco
    >throughput.
    >
    >Use ttcp to test the transfer limits, not ftp.
    >
    >http://www.mirrors.wiretapped.net/security/packet-construction/ttcp/ttcp.c
    >
    >
    >
    Thanks for all the great answers. I think that packets per second is
    just as important as megabits per second when evaluating routing. We
    are a wholesale VoIP operator, so we switch many small packets (less
    than 100 bytes each) - it takes almost as much CPU power to make routing
    decisions for a 100 byte packet as for a 1500 byte FTP packet. You will
    find much of the Cisco specs talk about throughput in packets per second
    (pps, or kpps).

    The NIC I am using is the built in Intel i82555 in a DL360 1U server.
    According to vlan(4), the fxp driver doesn't do native VLAN, but can do
    large MTU for VLAN tagging. This should give enough performance for our
    initial requirements (up to 10mbit) and I'll review it later.

    I'm also curious about whether FreeBSD supports polled rather than
    interrupt driven behaviour in the NIC driver - that means that the
    system won't keep on re-entering an interrupt handler concurrently while
    under load (when a DoS attack is in progress).

    The server will be set up tommorrow - I'll do some tests and publish my
    experiences on my web site, as I know several of my customers want to
    duplicate this for their own redundancy plans.

    Regards,

    Daniel

    --------------------------------------
    Director
    London Voice and Data Exchange Limited
    http://www.lvdx.com
    --------------------------------------

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