converting to a dynamic zone

[Mike Shannon]

Hello list!

We have a couple of existing subdomains here that I'd like to convert to dynamic, is there an easy way to migrate?  I'm afraid if I just start allowing dynamic updates then I'll need to delete an old entry then the journals getting outta whack, then I'd have to delete the .jnl file to get named to run, not a good approach.  

Are there any tools available for ddns that would tell me the last IP address used in a range?  I know I could just document as I go, but it seems like there might be someone out there that has gone through this.

Sorry if this has been addressed before, I tried searching the archives but didn't really find what I was looking for.  I've also read 'dns and bind' and didn't find much useful information there.  Starting from scratch isn't really an option, nor is creating a new subdomain - so I need to have a tool that will look through my existing zone file and create a file that nsupdate understands, then maybe I can get rid of the old zone file?  

Also, is there anyway to see what changes have been made in like the last 24 hours or last 1 month?  I'm guessing this would be some sort of log analyzer, but hopefully someone on this list will have something better than a guess.

Right now I'm running bind 9.2 which will be updated by dhcp 3.0.  I've already got everything in place and I'm ready to get going on this!  

any help would be appreciated!

____________
Mike Shannon mikesha at u.washington.edu 
Systems Programmer
U of W