Configuring Multiple DHCP Scopes

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Guest

I'm currently running Windows 2000 server and we're using one scope of
10.20.0.100 - 10.20.0.199 on a 255.255.255.0 subnet. I have a new company
moving into the building that will have 10 Voice over IP phones and 2
computers. I would like to put them on a different scope all together. I
attempted to create a new scope using 10.20.1.100 - 10.20.0.112 with a subnet
again of 255.255.255.0 and I also created reservations for all the Voice/IP
phones with their MAC addresses. After configuring the new scope, however,
the phones still took an IP from my first scope. How do you make it so they
use the new scope or did I configure my second scope wrong?

Please help..
 
If you are using superscopes, temporarily exclude all the addresses in the
original scope. Reboot the new devices. Not sure what you are trying to
do.

Doug Sherman
MCSE, MCSA, MCP+I, MVP
 
Rich said:
I'm currently running Windows 2000 server and we're using one scope of
10.20.0.100 - 10.20.0.199 on a 255.255.255.0 subnet. I have a new company
moving into the building that will have 10 Voice over IP phones and 2
computers. I would like to put them on a different scope all together. I
attempted to create a new scope using 10.20.1.100 - 10.20.0.112 with a subnet
again of 255.255.255.0 and I also created reservations for all the Voice/IP
phones with their MAC addresses. After configuring the new scope, however,
the phones still took an IP from my first scope. How do you make it so they
use the new scope or did I configure my second scope wrong?
Click to expand...

Get rid of the SuperScope. Use one independent and distinct Scope per
subnet. Each Subnet should run on its own "wire".

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com
-----------------------------------------------------
Understanding the ISA 2004 Access Rule Processing
http://www.isaserver.org/articles/ISA2004_AccessRules.html

Microsoft Internet Security & Acceleration Server: Guidance
http://www.microsoft.com/isaserver/techinfo/Guidance/2004.asp
http://www.microsoft.com/isaserver/techinfo/Guidance/2000.asp

Microsoft Internet Security & Acceleration Server: Partners
http://www.microsoft.com/isaserver/partners/default.asp
-----------------------------------------------------
 
So you're saying adding another NIC card to the server that is assigned to
the second scope? Two scopes can't operate on the same NIC? How does a
network device know how to use one scope over another when it's booting up?
This is where I become confused.

Thanks,
Richard Stine

Phillip Windell said:
Rich said:
I'm currently running Windows 2000 server and we're using one scope of
10.20.0.100 - 10.20.0.199 on a 255.255.255.0 subnet. I have a new company
moving into the building that will have 10 Voice over IP phones and 2
computers. I would like to put them on a different scope all together. I
attempted to create a new scope using 10.20.1.100 - 10.20.0.112 with a subnet
again of 255.255.255.0 and I also created reservations for all the Voice/IP
phones with their MAC addresses. After configuring the new scope, however,
the phones still took an IP from my first scope. How do you make it so they
use the new scope or did I configure my second scope wrong?
Click to expand...

Get rid of the SuperScope. Use one independent and distinct Scope per
subnet. Each Subnet should run on its own "wire".

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com
-----------------------------------------------------
Understanding the ISA 2004 Access Rule Processing
http://www.isaserver.org/articles/ISA2004_AccessRules.html

Microsoft Internet Security & Acceleration Server: Guidance
http://www.microsoft.com/isaserver/techinfo/Guidance/2004.asp
http://www.microsoft.com/isaserver/techinfo/Guidance/2000.asp

Microsoft Internet Security & Acceleration Server: Partners
http://www.microsoft.com/isaserver/partners/default.asp
Click to expand...
 
Rich said:
So you're saying adding another NIC card to the server that is assigned to
the second scope? Two scopes can't operate on the same NIC? How does a
network device know how to use one scope over another when it's booting up?
This is where I become confused.
Click to expand...

No. One nic in the server,..one IP# for the Server. DHCP does not have to
"live" in the same subnet as the client getting the addresses from it. I
have a pair of redundant DHCP Server running in a single subnet that give
out addresses to clients in 5 different subnets, and my topology allows for
8 subnets without much modification (for future growth).

The LAN Routers between the subnets must be configured to capture the DHCP
Queies from the clients and pass them to the DHCP Server. The Router
includes with that the proper information so that the DHCP Server knows
which Scope to pull the address from so that the clients get a compatible
address for the correct subnet they are in.

There really isn't much to it. But you only use regular Scopes, just one
normal Scope for each subnet you want to serve. No Superscopes! Superscopes
are for Multi-netting which is really "rare",...and in my opinion,...almost
always needless. It is too easy to "not" have the multi-nets,..too easy to
avoid them,...to have to put up with such a contraption.

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com
-----------------------------------------------------
Understanding the ISA 2004 Access Rule Processing
http://www.isaserver.org/articles/ISA2004_AccessRules.html

Microsoft Internet Security & Acceleration Server: Guidance
http://www.microsoft.com/isaserver/techinfo/Guidance/2004.asp
http://www.microsoft.com/isaserver/techinfo/Guidance/2000.asp

Microsoft Internet Security & Acceleration Server: Partners
http://www.microsoft.com/isaserver/partners/default.asp
-----------------------------------------------------
 
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