Internal roots vs Internet roots

[phn at icke-reklam.ipsec.nu]

I would like to ask the group about the collective wizdom 
of using internal root-servers within larger organizations
versus a "transparent with split-dns" scenario.


When to use internal roots, when not to. Whats the 
biggest problem with either ( using Internet roots and
hidden internal zones demands a massive forwarding ??)


Any hints and examples from your networks are welcome.

( I'm collecting background for a larger corporation and would
like to broaden my own view)



Thanks in advance

/PS
 anyone interested can mail me direct : peter (a t ) ipsec.se ,
if you want to stay anonumus that's ok with me, I won't 
give out details.

/DS
-- 
Peter Håkanson         
        IPSec  Sverige      ( At Gothenburg Riverside )
           Sorry about my e-mail address, but i'm trying to keep spam out,
	   remove "icke-reklam" if you feel for mailing me. Thanx.