theforeman/foreman · error · Net::Validations::Error

Invalid MAC #{mac}

Error message

Invalid MAC #{mac}

What it means

Error "Invalid MAC #{mac}" thrown in theforeman/foreman.

Source

Thrown at app/lib/net/validations.rb:87

    def self.multicast_mac?(mac)
      return false unless validate_mac(mac)

      # Get the first byte
      msb = mac.tr('.:-', '').slice(0..1).to_i(16)

      # Is least significant bit set?
      msb & 0b1 == 1
    end

    def self.broadcast_mac?(mac)
      return false unless validate_mac(mac)
      mac.downcase == 'ff:ff:ff:ff:ff:ff'
    end

    # validates the mac and raises an error
    def self.validate_mac!(mac)
      raise Error, "Invalid MAC #{mac}" unless validate_mac(mac)
      mac
    end

    # validates the hostname
    def self.validate_hostname(hostname)
      HOST_REGEXP.match?(hostname)
    end

    # validates the hostname and raises an error
    def self.validate_hostname!(hostname)
      raise Error, "Invalid hostname #{hostname}" unless validate_hostname(hostname)
      hostname
    end

    def self.validate_network(network)
      validate_ip(network)
    end

View on GitHub (pinned to 6b05625475)

When it happens

Trigger: Thrown at app/lib/net/validations.rb:87 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of theforeman/foreman@6b05625475 (2026-08-23). Data as JSON: /api/errors/dbfea8b9c9fc6a1e. Report an issue: GitHub.