Re: Problem with shared-network

Posted by Bob Harold on
URL: http://isc-dhcp-users.193.s1.nabble.com/Problem-with-shared-network-tp145p151.html

On Thu, Jun 4, 2015 at 1:38 PM, <[hidden email]> wrote:

<aside>I use ignore rather than deny to keep my logs cleaner. Deny logs
every attempt. The ignore just ignores. And yes, I realize mac filtering
can be easily defeated by a knowledgeable opponent. A weak attempt at
security is not my purpose for using mac lists.</aside>

I did not have pools. Now I do. Unfortunately, I still get the same
behavior. Just for kicks, I reversed the order of the subnets, and to my
surprise, still got the same behavior, except now the 192 subnet still
works. So the pools helped. This makes me believe the problem is the 10
subnet declaration.

I removed the 192 subnet and the shared-network and just left the 10
subnet. When I attempted to restart the DHCP server, I got the no subnet
declaration for eth0 and it exited. Adding eth0:1 to both the command line
and /etc/defaults/isc-dhcp-server did not change the result, only the
error message: "No subnet declaration for eth0:1 (No IPv4 addresses)"

DHCP needs the 192 subnet to be defined.  It does not need to have a range, or any options, it can be an empty definition, but if it is not defined, it will ignore that interface.

 

So despite the shared-network statement, the DHCP server still doesn't
recognize virtual interfaces??? Can this be right?

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