A peek inside the DHCP server

Here is what the DHCP server looks like for a network with VLANs on every floor and a VOIP system.



From the pic you can see all the scopes created. What is happening here as I mentioned before is that each floor is it own VLAN and each VLAN gets their IP from the scope that it's associated with. Remember that IP helper address I told you about (10.100.1.22) well this is the server.

You will also notice more than half my scopes are inactive. This is b/c the 12th floor isn't online as of yet. Also the other scopes are for the IP phones for each floor too. Those aren't rolled out yet either. Yes the phones need a scope too. They will have IP's as well.

For the ones that don't know the IP phone plugs into a standard RJ45 jack (the network jack)and your PC plugs into the phone. The IP phone is also a switch.

Bottom of a Cisco IP phone
10/100 SW goes into your network jack
10/100 PC connects to your PC
The AC power port you do not need if you have power over ethernet (PoE). Your access switches will power your IP phones.