[lug] Multihoming with Redhat

[rm at mamma.varadinet.de]

On Thu, Jun 07, 2001 at 11:41:24AM -0600, J. Wayde Allen wrote:
> On Thu, 7 Jun 2001, Dhruva Reddy wrote:
> 
> > This gives me:  SIOCSIFFLAGS: No such device
> 
> > > > > > > > SIOCSIFADDR: No such device
> > > > > > > > SIOCSIFFLAGS: No such device
> > > > > > > > SIOCSIFNETMASK: No such device
> > > > > > > > SIOCSIFBRDADDR: No such device
> > > > > > > > SIOCSIFFLAGS: No such device
> > > > > > > > SIOCADDRT: No such device
> 
> Everytime I've seen these errors there has been some kind of hardware
> level failure.  Typical reasons I've seen are:
> 
>    - Driver not correctly recognizing the NIC
>    - IRQ conflicts
>    - The NIC not initializing correctly
>    - The NIC not autodetecting the active port
> 
> I've never heard anyone give a solid explanation as to what these errors
> actually mean, and or indicate, but I think they are kernel level
> failures.  Basically, your kernel isn't able to talk to the networking
> hardware for whatever reason.  That is probably where you need to focus
> your troubleshooting.  The higher level network configuration (DNS,
> routing, etc.) won't work until this lower level problem is solved.

Maybe this is _way_ too trivial, but if you want to use eth0:1 etc.
you need to configure your kernel to support 'network aliasing' ( CONFIG_NET_ALIAS )
or you will see this kind of error messages.

 Ralf's 2 ct.