Show failed and incomplete neighbor entries
Build a paste-ready command, then review its compatibility and effects before running it.
ip neigh show nud failed,incompleteread-onlyno known side effects Compatibility
LinuxVerified for Linux using posix, bash, zsh syntax.
Operational knowledgereview due 2027-01-20
Requirementsipip must be installed and available on PATH.
Version supportip Current supported releasesVerified for linux using posix, bash, zsh syntax; consult compatibility notes for platform-specific differences.
Expected signals192.0.2.1 dev eth0 FAILEDRepresentative successful output; values vary with the selected target and system state.
Known errorsip: command not foundip is missing or is not available on PATH.
Verifyip neigh show nud failed,incompleteThe output matches the expected target and exits without an error.Rollback noteNot required: this command is read-only and does not change system state.
Command breakdown
01ipCommandRuns the ip stage of this one-liner.
02neighArgumentPasses neigh to ip.
03showArgumentPasses show to ip.
04nudArgumentPasses nud to ip.
05failed,incompleteArgumentPasses failed,incomplete to ip.
Example input
ip neigh show nud failed,incomplete
Example output
192.0.2.1 dev eth0 FAILED
Illustrative output — exact values vary by system and data.
Official sources