No network interfaces with 10.1-RC2 kernel and 9.2 userland

[John Nielsen]

On Oct 15, 2014, at 10:54 AM, Konstantin Belousov <kostikbel at gmail.com> wrote:

> On Wed, Oct 15, 2014 at 04:36:19PM +0000, Glen Barber wrote:
>> On Wed, Oct 15, 2014 at 11:56:43AM -0400, Eric van Gyzen wrote:
>>> I used freebsd-update to update a 9.2-RELEASE-p10 i386 system to
>>> 10.1-RC2.  After installing the kernel and rebooting, still using the
>>> 9.2 userland, ifconfig showed no interfaces.  Is this expected?  Do I
>>> need to bounce through 9.3 or 10.0 first?
>>> 
>> 
>> What interfaces should be there?
>> 
>> Please provide the contents of /var/run/dmesg.boot.
> 
> The interfaces used to manage networking (i.e. the kernel calls utilized
> by ifconfig(8), route(8) and others) are not kept stable between stable
> branches.  Usually, the compatibility is broken.
> 
> Simply put, you cannot use configuration utilities from stable/9 on
> stable/10 kernel.  This is expected.
> 
> You did not followed the instruction in UPDATING.

Oh, I missed the bit about the old userland. Yes, that is expected. You need to run "freebsd-update install" one or more times to install the new userland and remove old libraries (once you've updated your ports/packages).