How to take backup for Windows IAS server and DHCP server ?

For Windows 2003 Server if we want to take backup and restore it in another Windows machine, we have a very handy command "netsh"

c:\> netsh ?

Commands in this context:
?              - Displays a list of commands.
aaaa           - Changes to the `netsh aaaa' context.
add            - Adds a configuration entry to a list of entries.
bridge         - Changes to the `netsh bridge' context.
delete         - Deletes a configuration entry from a list of entries.
dhcp           - Changes to the `netsh dhcp' context.
diag           - Changes to the `netsh diag' context.
dump           - Displays a configuration script.
exec           - Runs a script file.
firewall       - Changes to the `netsh firewall' context.
help           - Displays a list of commands.
interface      - Changes to the `netsh interface' context.
ipsec          - Changes to the `netsh ipsec' context.
ras            - Changes to the `netsh ras' context.
routing        - Changes to the `netsh routing' context.
rpc            - Changes to the `netsh rpc' context.
set            - Updates configuration settings.
show           - Displays information.
wins           - Changes to the `netsh wins' context.
winsock        - Changes to the `netsh winsock' context.

To take IAS server backup

Server 1

c:\> netsh aaaa show config > backup.txt

Server 2 ( restore)

c:> netsh exec backup.txt

To take DHCP Server backup and restore

Server 1

c:\> netsh dhcp server export dhcpbackup.txt all

Server 2

c:\>  netsh dhcp server import dhcpbackup.txt all