Windows Server DHCP conversion to Cisco CLI

I recently ran in to an issue where I needed to convert a reasonably large DHCP database from a Windows Server in to a Cisco CLI to allow the Cisco to take over DHCP roles for a subnet. I found nothing that realy automated this task, even using the exported XML file. So knowing that this was the second time I needed the tool, and likely to need it again, even if it was for smaller tasks, I set about coding it in Powershell. It is the scripting system well supported in Windows land.

The current version of the script can be found on my GitHub repository:Convert-WindowsDHCPToCisco

Still ha smany DHCP options that it hasn't been setup to hanle at this point but it does follow the basic ones that most of us use.

Currently handles DHCP Options

Code	Option Description	Cisco Output
3	Default Gateway	default-router
4	Time Server	ignoring
6	Domain Nameserver	dns-server
15	Domain Name	domain-name
42	NTP Servers	option 42 ip
51	Lease time	ignoring
66	TFTP Server	next-server
67	Boot filename	bootfile
81	MS DHCP Name Protection	ignoring
121	Static routes	option 121 hex
161	FTP Server	option 161 ip
162	Path	option 162 ascii
252	Proxy PAC URL	option 252 asicc

DHCP References Used

• RFC2312
• Wikipedia DHCP Options table