Problems on trunk

[Nick Guenther]

On 7/4/06, Marius Van Deventer - Umzimkulu <mvdeventer at illovo.co.za> wrote:
> Hi all
>
>
>
> I have tried to experiment with trunk (to see how it works) and I get
> this problem.
>
>
> I issue the command:
> ifconfig trunk0 trunkport pcn0 trunkport pcn1 10.64.15.250 netmask
> 255.255.254.0
>
>
> After that I expect my trunk0 to function as a network interface, but it
> (and my physical interfaces) can not send or receive anything. If I try
> to ping anyone I get the error message: device is busy.
>
>
>
> Note the unusual subnet. Is this a possible cause?
>
> I tried to type ifconfig pcn* up for each interface before issuing the
> above command but to no avail.
>
> In any case, what I really need is some more reading material on trunk.
> Does anyone have a howto, a case study or any other material I can use
> to add to the knowledge I have already gained from the man pages? Google
> has made me none the wiser Also let me know if I need to add any info to
> this post, dmesg, info on network structure etc.

Hi Marius,

I'm sorry no one answered you on misc at . You will have a worse response
here, but maybe I can help point you in the right direction. I do not
know much about trunk either so this will be good for me too.

Do not just try ping, try actually opening the raw device and writing
to it (or use /dev/bpfN); use both simple shell methods (echo blah >
/dev/device) and writing programs (fd = open("/dev/device"); write(fd,
"blah")). Try with different subnets. Try with only one interface in
the trunk, or zero.

-Nick