[NTLUG:Discuss] Broadcast IP address

[Ralph Green]

Leroy,
On 11/10/12, Leroy Tennison <leroy_tennison at prodigy.net> wrote:
> Where is the DHCP server?  If it's on the same subnet then it should see
The DHCP server is in the original range.  It is 192.168.4.221

> the broadcast of the clients.  The real question is what happens when
> they try to renew their lease?
  That is the open question at the moment.  I restarted the dhcp
service this morning with the new configuration.  I am waiting for
some leases to renew to see how it goes.  I changed the network
configuration on that machine to have the new netmask.  I have not
restarted the network yet.  I was going to do that at the end of the
day to lessen the chance that I will disrupt anyone's work.

>  It shouldn't be granted because the
> subnet has changed.  What I would hope would happen then is the client
> would request a new IP address on any subnet and be granted one on the
> new subnet.  This is the way Windows works but I've never had the need
> to find out what happens on Linux.
  I am not changing the IP address range that the DHCP server hands
out.  I only changed the netmask it hands out.  I setup a new OpenVPN
server that will hand out addresses in the new range and the point of
this was to let machines connecting through that new OpenVPN server be
able to talk to servers in the old IP range.  The servers all have
static IP addresses in the 192.168.4.x range that are not overlapping
with addresses the dhcp server hands out.

  I probably did not have to adjust the netmask handed out by the DHCP
server since user machines don't talk to each other.   I just wanted
to d it in case users need to talk to each other in the future for
some reason.

Ralph