Configuration errors

Validation errors include field paths, including positions in address lists. A file can report several errors at once.

Problem	What to check
Unknown field	Check the spelling and location against the field reference. Configuration fields belong directly beside match, not inside state.
Read-only field	Remove observation fields such as carrier from the policy. To select by driver or MAC address, put the value under match.
MTU out of range	Use an integer between 68 and 65535.
Invalid IPv4 address	Include an IPv4 address and prefix, such as 192.0.2.10/24.
Wrong value type	Use true or false for booleans and unquoted numbers for integer fields.
Missing match	Give an explicit policy at least one field under match, such as name.
Duplicate policy name	Choose unique explicit names, or different filenames for unnamed policies.
More than one YAML document	Replace ----separated documents with a single list of mappings.

If you cannot resolve an error, include the configuration and full message when reporting a problem. Remove private addresses or other details you do not want to share.