[LARTC] how to debug RTNETLINK invalid argument?

[Larry Brigman]

On 5/23/06, George Nychis <gnychis at cmu.edu> wrote:
>
>
> Larry Brigman wrote:
> > On 5/23/06, George Nychis <gnychis at cmu.edu> wrote:
> >> Hey,
> >>
> >> I am getting an invalid argument trying to insert a qdisc:
> >>
> >> [root at emu-5 iproute2]# tc qdisc add dev eth0 root xcp capacity 50Mbit
> >> limit 500
> >> RTNETLINK answers: Invalid argument
> >>
> >> I'm not sure whats wrong here, because i can successfully insert this
> >> qdisc on other computers of mine.
> >>
> >> How can i debug this?
> >>
> > Check to see which kernel versions you have on the boxes that work and
> > the one that
> > does not.  Also check to see if you have the latest version of
> > iproute2 installed on the
> > machine that does not work.
> >
>
> They are both running the exact same kernel and version of iproute2,
> however they are in different environments, what could the environment
> have to do with it?
>
Modules that are not loaded?  modprobe.conf?
lsmod on both boxes looking for specific networking modules.