DNS (a) record - TTL keeps reverting to default 10 minutes
Posted on 2009-04-13
I have a W2K3 SP2 server farm with two domain controllers, both configured with Global Catalog and both running DNS server (AD integrated) which are able to replicate to each other perfectly. All my client servers are pointing to both DNS servers in their IP configuration, with the primary DC as the first DNS server and the secondary DC as the second DNS server. For reasons related to application failover and uptime, I need to set the TTL for my domain.name to 30 seconds so that if the primary DC goes down the domain.name will re-resolve to the second DC in under one minute. However although this method works, I discovered that the (a) records keep reverting to the default of 10 minutes?
Does anyone know why this is happening and how I prevent this please? I need my domain.name (a) records to have a TTL value which is less than one minute.