Expanding 32 and 64 blocks to class C

[Gregory W Zill]

I have the upcoming task of moving off of our couple smal ip blocks to a 
full Class-C. I use webmin to administer my 2 BIND 9 servers. I think 
one of the first steps is to lower TTL to like 900. However I see two 
TTL entries in each zone. Which one?

I then wannt to know if I can avoid downtime some how?

Look forward to some great guides from y'all.
-- 
"Never have so many understood so little about so much."
                              -- James Burke