Need help with Networking Assignment, Please!!!?

Question

One of your newly configured sites is having a problem with IP address conflicts. Some of the addresses being leased by the DHCP servers are already configured on servers, printers, and workstations. The DHCP servers are using 192.168.1.10 through 192.168.1.19. The printers are using 192.168.1.20 through 192.168.1.29

***Usually you do not have 10 DHCP servers on the same subnet. Consider that the 10-19 is the range of IPs that the server provides.

What are your options for eliminating these conflicts?

Answer 1

Sound like the network is already established... should have really kept a number of address aside during the planning stage to allow for static addresses and possible further expansion... but as they are already running it would be less problematic to use reservations for the ip addresses that are statically assigned.. if you can stop all dhcp services to redesign the addressing then great you do what someone else has suggested in the answers page (sorry cant remember name) but as most bosses would hit the roof if you disrupted connectivity for 10 second let alone a couple hours for design and a little longer whilst the ip address reasignment for 10 dhcp servers... and i think confict detection may have problems with that many dhcp servers.

the reservations will allow you to assign the ip addresses to the mac addresses of the devices that you use, and as long as you assign the same addresses to the devices then tempramental printers should not be effected.

remember to make sure that the DHCP servers them selves are not over-lapping (you said 10 dhcp servers) with the addresses they are leasing and use exclusions to stop them leasing addresses that another server is assigning.

goodluck

Answer 2

I assume that you're in a Microsoft enivronment.

1. Make sure that your DHCP server are authorised
2. Stop the DHCP service
3. Delete all DHCP leases on the server.
4. Created a reservation on your DHCP server then assign the reserved IP address to your server's, printers, etc. By creating this you're telling the server to only use that IP address range for the server's, printer, etc.
5. restart the DHCP service on the server.

Problem should now be fixed. (this is only a simplifed version of events)

Extra reading:

http://www.oreilly.com/catalog/dhcpwin2000/chapter/ch04.html
http://www.computerperformance.co.uk/w2k3/services/DHCP_Configure.htm
http://technet2.microsoft.com/WindowsServer/en/library/35253d08-ad4d-49e2-aeb7-6605c8f939a21033.mspx?mfr=true

Answer 3

Assign a static IP that does not fall into the range of the DHCP IP range to the site with conflict address

Answer 4

In the dhcp settings on the dhcp server, change the available address pool to something that is not in use by static devices.

Either that or set dhcp reservations for every device that do not conflict with static devices.

Let's say you have 50 workstations maximum. In your case I would set the dhcp address pool between 192.168.1.30 to 192.168.1.80.

Answer 5

There's a lot of good articles at http://networking.hammocksurvivalguide.com/
on networking. I don't know if it will solve your problem, but there's plenty of useful info there.