DNS server does not have a cache (or database) entry for root name server. The cache file MUST have at least one NS record, indicating a root DNS server and a corresponding A record for that root DNS server. Otherwise the DNS server will be unable to contact the root DNS server on startup and will be unable to answer queries for names outside of its own authoritative zones.
| Source | Event Log | Event ID | Event Type |
|---|---|---|---|
| DNS | System | 156 | Warning |
The cache file contains name-to-IP-address mappings for the DNS servers on the Internet root. The cache file is used to resolve over the Internet name queries from outside the enterprise network. Microsoft DNS server automatically installs a cache file in the Systemroot\System32\Dns directory.
Use the cache file that was automatically installed when DNS Manager was installed. If you need to obtain a new copy, connect to internic.net and download the cache file from there. If you cannot connect to the Internet, delete the current cache file and create a new one by first backing up all of your database files and then reinstalling DNS Manager.