From: King, Michael (MKing@bridgew.edu)
Date: Mon Jun 28 2004 - 08:41:22 CDT
The CIDR kit was built with this functionality inmind.
You need to add a "Secondary" address range, secondary being the Key
CISCO word. In my enterasys gear, I just add a second subnet.
Here is an example of one of my subnets. I use a small range that I
broke and spread across three different subnets. I have a bunch of
different options in there for different reasons.
shared-network "Scott Hall" {
subnet 192.168.140.0 netmask 255.255.255.192 {
ignore bootp;
one-lease-per-client true;
option domain-name-servers 192.207.56.12;
max-lease-time 120;
default-lease-time 120;
ddns-updates off;
# Unknown clients get this pool.
pool {
option routers 192.168.140.62;
range 192.168.140.1 192.168.140.61;
allow unknown clients;
}
} # end Subnet
subnet 207.206.226.0 netmask 255.255.255.0 {
ignore bootp;
option domain-name-servers 207.206.230.1, 192.168.254.3,
192.207.56.1;
one-lease-per-client true;
option domain-name "reshall.bridgew.edu";
ddns-domainname "reshall.bridgew.edu";
option broadcast-address 207.206.226.255;
max-lease-time 604800;
default-lease-time 604800;
# Known clients get this pool.
pool {
option routers 207.206.226.254;
range 207.206.226.2 207.206.226.251;
deny unknown clients;
}
} # end Subnet
} # End of Scott
-----Original Message-----
From: owner-netreg@southwestern.edu
[mailto:owner-netreg@southwestern.edu] On Behalf Of Jeff A. Earickson
Sent: Thursday, June 24, 2004 3:26 PM
To: netreg@southwestern.edu
Subject: NetReg: subnets for registered vs unregistered machines
Hi,
I'm running netreg1.3rc2 in a testbed subnet, and right now I'm
splitting my class-C subnet into registered and unregistered machines:
subnet 137.146.214.0 netmask 255.255.255.0 {
#---unknown clients
pool {
range 137.146.214.64 137.146.214.99;
#---DNS from this box only!
option domain-name-servers 137.146.214.50;
one-lease-per-client true;
default-lease-time 120;
max-lease-time 120;
allow unknown clients;
}
#---registered clients
pool {
option routers 137.146.214.1;
range 137.146.214.100 137.146.214.254;
default-lease-time 2419200;
max-lease-time 4838400;
deny unknown clients;
}
}
In our real setup, we have 100+ subnets that I would have to subdivide
like this. Our network guy doesn't like this. He would rather have one
or more "netreg" class-C subnets, whereby any unregistered machine would
end up there, no matter what port they plugged into on our campus. How
to do this?
Jeff Earickson
Colby College
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