DNS resolution options in SolarWinds NTA
To meet your specific network monitoring needs, SolarWinds NTA provides the following options for configuring DNS resolution:
Resolve and store IPv4 hostnames immediately when a flow record is received
This option continuously resolves domain names for all devices involved in monitored flows. For typically-sized networks, SolarWinds NTA views may load more quickly as resolved domain names are retained, but database query times may increase as your Orion database is continuously queried. This is the default option for new installations.
Top Domains resources and Orion reports that include DNS names require resolving and storing IPv4 hostnames immediately when a flow record is received. SolarWinds NTA does not support internationalized domain names. Internationalized domain names include special characters and symbols and non-English letters, such as Japanese and Chinese letters.
Resolve IPv4 and IPv6 addresses to DNS hostnames
Resolving IPv4 and IPv6 addresses to DNS hostnames is intended to assist users with larger networks. With this option, an endpoint domain name is only resolved when information about it is actually requested from the SolarWinds Orion database. Database query times may be improved with this option as queries are limited, but the load time for some endpoint-related resources may increase as SolarWinds NTA waits for domain name resolution.
Top Domains resources and Orion reports that include DNS names require immediate resolving and storing of IPv4 hostnames, so they will not display DNS names if you enable the option Resolve IPv4 and IPv6 addresses to DNS hostnames.