Netgraph Fast Ether-Channel kernel module

From: Denis Guerrero (dguerrero_at_cisdata.net)
Date: 10/05/04

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    To: freebsd-isp@freebsd.org
Date: Mon, 4 Oct 2004 17:19:13 -0700

            I recently came across the documentation provided at
    http://www.bsd-dk.dk/archives/2001/Mar/0027.html
    for implementing the Netgraph Fast-Channel kernel module on FreeBSD
    systems it works great. One thing that I have not been able to figure
    out is how to change the mtu on the pseudo device to anything greater
    than 1500(I want mtu 9000). If I do

    #ifconfig fec0 mtu 1000 (this works if its any value less than 1500)

    but, if I do

    #ifconfig fec0 mtu 9000 (I get the following: " ifconfig: ioctl (set
    mtu): Invalid argument ")

    I also tried changing the "NG_FEC_MTU_Default 1500" line in the
    ng_fec.h file to

    NG_FEC_MTU_Default 9000

    and then do a build/install new kernel and build/install world. Still
    have no success. I you have any suggestions I would greatly appreciate
    it.

    HERE IS MY ENTIRE SCRIPT:
    #! /bin/sh

    echo "load module";
    cd /usr/src/sys/modules/netgraph/fec/

    kldload /usr/src/sys/modules/netgraph/fec/ng_fec.ko

    echo "kldstat results";

    kldstat

    echo "create psuedo fec interfaces";

    ngctl mkpeer fec dummy fec

    echo "bind physical interfaces to pseudo devices";

    ngctl msg fec0: add_iface '"em0"'
    ngctl msg fec0: add_iface '"em1"'

    echo "set capture mode for each pseudo interface";
    ngctl msg fec0: set_mode_inet

    echo "set all physical and pseudo interfaces to promiscuous mode";
    ifconfig fec0 promisc
    ifconfig em0 promisc
    ifconfig em1 promisc

    echo "bring up pseudos";
    ifconfig fec0 up

    Regards,

    Denis

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