DHCP/Relay/Superscopes...help plz. 1

[1666]

Hi all, probably a simple question, but we currently use DHCP in our office, it is on a Win2k server and is a single scope. We are now trying to setup DHCP in one of our remote office as a test, the router has DHCP relay enabled and the routers DHCP relay is pointing to our DHCP Server's IP address, but what now? We need to create a new scope for this office now, but don't what our current LAN (HQ - and get confused) to start using a second scope that we will need to create for our test remote site, so do we need to create a 2nd scope or a superscope?

Kind Regards

A

 

[ricpinto]

Exclude the remote ip address scope from your office DHCP.

 

[1666]

I forgot to mention that the remote office will be a different IP range and subnet, but would this make a difference?

 

[ricpinto]

I'm assuming you're on a subnetted environment.
What are your requirements? Do you want office DHCP(dhcp1) to service remote PC in case remote dhcp (dhcp2) breaks down? If your answer is "yes" then create a new different scope (scope2) on dhcp1 similar to the subnet of dhcp2 but exclude the scope of dhcp2 from scope2 to avoid conflict when both dhcp's are on line. If still not working, check DHCP relay or try the "user class option" in your DHCP but you have to read this first

http://www.winnetmag.com/Articles/Index.cfm?ArticleID=7983

If dhcp2 will be independent then disable DHCP relay and just create your scope.

 

[1666]

Sorry, my explainations are somewhat lacking..here goes

We have a head office with one DHCP server which servers the whole office. We have only one scope setup on the DHCP server and it works fine. We have a remote site which is on a 2mb lease line, it only has Win2k PC's there and no servers and they use a completely different static IP range at. We have had our Cisco router enable to use DHCP relay and this "points" to our single DHCP server in our head office....I've heard a superscope might be needed. If this works we will set this up for our other offices too...

 

[GlenJohnson]

it only has Win2k PC's there and no servers and they use a completely different static IP range

So you're trying to go from static ip's to dynamic?

Glen A. Johnson
Johnson Computer Consulting
MCP W2K
glen@johnsoncomputers.us


Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884
"Action is the proper fruit of knowledge."
Thomas Fuller (1610-1661); English scholar, preacher

 

[ricpinto]

If you have serveral subnet at remote office then use superscope but if there's only one subnet then no need, just create a second scope and configure. Your DHCP will reconize your router other side IP (with DHCP relay enabled) and check it whether it has a scope in this range. Since you have created the second scope for this range then it will start offering it.

 

[GlenJohnson]

Here's the scoop according to MS on preventing problems using DHCP.
1)Use the 75/25 design rule for balancing scope distribution of addresses where multiple DHCP servers are deployed to serveice the same scope.
2)Use superscopes for multiple DHCP servers on each subnet in a LAN environment.
3)Deactivate scopes only when removing a scope permanently from service.
4)Use server-side conflict detection on DHCP servers only when it is needed.
5)Reservations should be created on all DHCP servers that can potentially service the reserved client.
6)For server performance, remember that DHCP is disk-intensive and purchase hardware with optimal disk performance characterstics.
7)Keep audit logging enabled for use in trouble shooting.
8)Integrate DHCP with other services, such as WINS and DNS.
9)Use the appropriate number of DHCP servers for the number of DHCP-enabled clients on your network.
MCSE - Microsoft Windows 2000 Network Infrastructure Administration Training Kit.


Good luck.

Glen A. Johnson
Johnson Computer Consulting
MCP W2K
glen@johnsoncomputers.us


Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884
"Action is the proper fruit of knowledge."
Thomas Fuller (1610-1661); English scholar, preacher