From: Mike Husmann (husmann@morningside.edu)
Date: Thu Apr 01 2004 - 10:25:48 CST
Byron,
The power of netreg comes in it being the only dhcp server on your
network. Pools containing ranges for both registered and
unregistered clients are present in the netreg server's dhcpd.conf
file. (see below)
When a client "registers", it's entry is placed at the bottom of
dhcpd.conf, which gets read every time dhcpd starts. Every mac
address in the list is considered "known".
An Example: snippit from a dhcpd.conf file
-------------------------------------------------------
shared-network campus{
subnet 172.19.0.0 netmask 255.255.0.0 {
# Unknown clients get this pool.
pool { ##
option domain-name-servers <IP of Bogus Server>;
max-lease-time 120;
default-lease-time 120;
range 172.19.2.0 172.19.2.254;
allow unknown clients;
}
} ## End of quarantine network
subnet 172.16.0.0 netmask 255.255.0.0 {
# Known Clients are in this pool.
pool {
option domain-name-servers <IP of Actual DNS Servers>;
max-lease-time 28800;
default-lease-time 28800;
range 172.16.17.2 172.16.17.250;
deny unknown clients;
}
}
} # end of shared-network
#<BEGIN STATIC>#
host mycomputer-1 { hardware ethernet 00:00:00:00:00:00; };#extra
info here...
----------------------------------------------------------
You can see by this example that when "mycomputer" boots, it is in
the list and gets an address from the "known pool". If it were not
in the list, it would get an address with the bogus dns server.
Hope this helps.
Mike
---- Original Message ----
From: bherlong@Tnstate.edu
To: netreg@southwestern.edu
Subject: RE: NetReg: basic conceptual question
Date: Thu, 1 Apr 2004 09:34:05 -0600
>Hello all,
>
>New to netreg... Struggling conceptually with the DHCP server
>portion..
>
>I understand that the netreg dhcp hands out an ip from a pool of ip
>addresses that aren't routable. Once they are registered, how is
>that
>ip dropped and a routable one retrieved?
>
>Our netreg dhcp will be separate from our primary campus dhcp
>server..
>How does netreg dhcp pass the request on to our primary once the
>client
>is "registered"? Conversely, how is the request initially picked up
>by
>the netreg dhcp and not the primary?
>
>Or, am I missing some point entirely?
>
>Thanks for any help, and patience....
>
>
>BH
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