gre tunnel doesn't create

Michael Powell nightrecon at
Tue Feb 18 19:57:16 UTC 2014

s m wrote:

> hello all
> i have freebsd 9.2 which is customized. now when i want to create gre
> tunnel and run "ifconfig gre0 create" command, this error is shown:
> ifconfig: SIOCIFCREATE2: Invalid argument
> i check this command on a fresh freebsd 9.2 and it works so my changes
> cause this. i have many changes on my freebsd (install many services,
> optimize kernel and ...) and i need all of them. do you have any
> suggestion what change causes this error? or how can i fix it in order to
> be able to create a gre tunnel?

Try and kldload the if_gre.ko module and see if that works. If so put 
if_gre_load="YES" in /boot/loader.conf or build kernel with device gre to 
make it permanent.


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