Dear Mora
Thank you for your help on this. We will waiting the progress from you.
But we would like to know the hardware and solution can support for upgrade to version 11 build 68.10 (The lasted version ) ?
Because we concerned this issue will occurred with the operation.
• In a deployment with heavy DNS traffic and many DNS cache entries, some entries in the cache might not get updated or deleted, even after the TTL expires.
[From Build 67.12] [# 619124, 622308]