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DHCP will not install.

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4 replies

by sulls

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We installed Win2003 SBS and during the process set the IP address of the server to a local address of 192.168.22.x with the server NIC on 192.168.22.2. It appeared that DHCP server had failed to install and now we get following message when we try to add DHCP Server. 'An error occured which prevent the DHCP component from being installed or removed. The data is invalid.' This occurs around 1/3 way through process. Any ideas on the cause and solution???

4 replies

by cg it

are you using 2 nics? and how far along are you in setting up the domain [can you start over from scratch]? Small Business Server 2003 is pretty automated in setup and if you were using only 1 NIC I strongly suggest you use 2 and start over. also when setting up your LAT exclude the LAN NIC IP from the LAT table.

by cg it

DHCP uses the LAN NIC to identify itself [as well as the DC, RRAS, & ISA server [if you have that version of SBS2003], so when the setup wizard asks which NIC to use for WAN and which to use for LAN and you specify the 192.168.22.X IP address, then asks if you want to add additional scopes for the LAT, you need to exclude the LAN NIC IP address or DHCP wont install.

by cg it

because the LAN NIC IP address will be in the scope of IP addresses DHCP would use for assignment to clients hense a conflict and will just stop or will install but not be available and can't be setup until you delete the LAN NIC IP address from the LAT.

by cg it

Normally the wizard will exclude the LAN NIC ip address from the LAT table but like everything else sometimes it doesn't do it's job.

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