Garmin HM210DP/DI - Manual (Page 28)

Getting Started with the Configuration Manager
20 EN/LZT 108 6492 R2 - October 2003
Field Description
DNS
Primary/Secondary DNS
Server: You may just keep the default 0.0.0.0.
If you enter the Primary/Secondary DNS addresses
given by your ISP, these DNS servers will be used in
addition to any DNS servers discovered automatically.
After completing the required settings, click the Submit button.
Then, go to Admin > Commit & Reboot and click the Commit button to
store your changes to permanent memory.