Scott,

Here is the error I am seeing when a request is made from a host in VLAN40 10.200.6.0/24:

DHCPDISCOVER from 00:0c:29:54:6f:b1 via 10.200.6.1: unknown network segment

If I switch the host to VLAN42 I get a similar error:

DHCPDISCOVER from 00:0c:29:54:6f:b1 via 10.200.7.1: unknown network segment

It looks like the requests are coming from the correct network.

David

On 04/21/2010 03:26 PM, Scott Henson wrote:

Excerpts from Adurotec's message of Wed Apr 21 13:48:55 -0400 2010:

I have cobbler managing dhcpd and the pxe booting worked fine on each of
my configured VLANS.
I recently changed the IP range of two of my VLANs and then modified the
dhcp.template followed by a cobbler sync.

Now when I boot a server that is in one of those two modified VLANs I
get "unknown network segment". 

Is there some other modification I need to make to cobbler and/or
dhcpd?  None of the unmodified VLANs are
having this issue.

Can you give us the full error message?  That generally means that
dhcpd is seeing a request from a network segment that it doesn't have
a configuration for.  You have 10.200.6.0/24 and 10.200.7.0/24
configured, but maybe the request is coming in from 10.200.5.0/24?