Depends a little bit how your setup is.
Do you using Snat?
if so, do u using Snat automap or Snat pools or f5 as a router?
the answer of above will give you if the oneconnect needs to be 0.0.0.0 or 255.255.255.255
oneconnect is also not suitable for every application... Like SFTP and so on.
http://support.f5.com/kb/en-us/solutions/public/7000/200/sol7208.html
I have also seen problem when using session limit on pool members, because of that it´s best practice to disable cmp on that vs and then the percistency will break, at least in some version i used before.
/Beinhard