Failed to install socket filter

[brad]

Just adding a second IP address to a single physical NIC with the second
IP address being in the same network as the first.  For example to a
machine with 10.0.1.1/255.255.255.0 I want to add 10.0.1.2/255.255.255.0
on the same eth0.  A problem I have seen with this is when pointing an
access server to 10.0.1.2 the radius service hears the request, but then
replies on 10.0.1.1.  Is that normal?  I have had other issues as well,
but this one sticks out.  Could this be the problem causing my 'Warning:
Failed to install socket filter' error in nagios?

Thanks,

Brad

-----Forwarded Message-----
> From: Jonathan Hutchins <hutchins at tarcanfel.net>
> To: kclug at kclug.org
> Subject: Re: Failed to install socket filter
> Date: Mon, 03 Nov 2003 11:28:01 -0600
> 
> What exactly are you trying to do Brad?
> 
> If you're adding a second NIC to a RedHat system, it's pretty easy although
> some releases don't do it automatically.  If that's the case, let us know
> (again?) what cards you're using and we should be able to walk you through
> it.
> 
> It sounds a bit as though one of your issues may be installing two
> interfaces on the same logical and physical subnet.  That can be done, but
> it's considerably more interesting.  Although I know it can be done,
> automatically load-sharing between the interfaces is not standard linux
> stuff.  You can use virtual machines with the respective cards configured
> seperately; you can use applications (such as Apache) that can be told which
> card to use.
> 
> Personally I'm not familiar with sub-interfaces - the eth0:(n)
> specifications.  As far as I know using those specifications require that
> all of the applications specify which instance of the interface they're
> talking to, and some default applications do not allow it.
> 
> Give us a clearer picture of what you're trying to do and we'll try again.
> 
> 
> 
> 
>