adding additional DHCP scope to SBS 2003

SBS is currently managing DHCP clients on the LAN.  It is running one DHCP server on 192.168.168.x.
I am adding a VLAN on 192.168.20.x,  which will also need a DHCP server.

If I right click on DHCP from within the DHCP applet, I have the option to 'Add server'  If I right click the existing server (192.168.168.x), I have the option to add a scope.
The current scope is 192.168.168.1-192.168.168.254 with about 10 blocks of excluded addresses.  The new VLAN will need a DHCP scope of 192.168.20.100-192.168.20.200.

Questions:
Would I add a scope to the existing DHCP server on vlan1, or a new DHCP server for vlan2?

Is there any chance this will effect or interfere with the existing DHCP settings; is there a way to backup the current settings?
AE_JBAsked:
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MisterTwelveConnect With a Mentor Commented:
the warns you receive, i never see them.

print screen i attach explain server options
If you define Scope Options, the clients receive GW and DNS settings from scope Options. if Scope options is not define receive this options from Server Options.

best Regards
Scope-Options.jpg
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MisterTwelveConnect With a Mentor Commented:
I think the best options is add a new scope to existent dhcp server.
setup a new scope without problems of existing dhcp settings, but remenber all scopes you setup on existing DHCP Server get "Server Options" for all scopes.

Best regards
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AE_JBAuthor Commented:
Just to be clear, I will add a new scope of 192.168.20.100-192.168.20.200 on the existing dhcp server.  The final step warns that new settings will supersede existing settings, but that is OK since they do not overlap..
When you say they get "Server options" , do you mean default gateway and dns server?  if the default gateway is 192.168.168.168 and DNS server is 192.168.168.2, will these pass through to the clients on the second DHCP scope?
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MisterTwelveConnect With a Mentor Commented:
View this link
http://www.wikihow.com/Create-a-New-Scope-in-DHCP

No warns happen. make sure you create scope like this link
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