HI
Use iproute's method, if you have save the config by capturing a text file from a show run output.
One or two issues. When you do a show run it lists shutdown interfaces by putting 'shutdown' in the text. If the interface is up there is not a 'no shutdown' entry, so you will need to add this manually.
That is, if the text file has a bit that blooks like this:
!
interface ethernet 0
ip address 10.1.1.1 255.0.0.0
!
You will need to edit it (using notepad only) to be:
!
interface ethernet 0
ip address 10.1.1.1 255.0.0.0
no shutdown
!
Then when you load the config back in the ethernet interface will come back up. Obviously you will neeed to edit each interface entry that you need running in the ame way.
Also compare the saved file with the show run as it appears on the console. There is no flow control on the interface, and is is possible for parts of long configs to get lost during the transfer. This is particularly true when you c&p the file back in to the router. Set your hyperterminal up with a line delay of 200 milliseconds (in the ASCII setup of the hyperterminal). This delay between lines does slow the transfer, but it gives time for each line to be added without any of it getting lost.
Then do :
en
conf t
<paste to host>
and your config will be restored.
Be aware that if you move the config from one router to another of the same type the c&p you do may overwrite some, not necessarily all, of any existing config. Do a write erase and reload before putting it in.
EB