My local DNS servers (ubuntu, bind9) are supposed to simply forward from my public name servers. However, if I make changes to public IP addresses, the information will replicate to Google, ATT, etc. within a few minutes, but takes as long as a day to for my local DNS. My local DNS servers are set to forward directly to my external name servers. Any reason why this would happen?
I almost feel like if I were to flush the cache of the local DNS servers, it would fix the issue, but I've done this before and it has broken things (not really in the mood for that, lol).