EXFO FTB-8500 Series for FTB-200 - Manual (Page 456)

Pop-Up Windows
442 FTB-8500 Series and FTB-8120NGE/8130NGE
IPv4 Configuration

Resolve MAC Address: When enabled, will send a request to the
network to retrieve the MAC address corresponding to the selected
destination IP address. This setting is disabled by default.
MAC Address Status: Indicates the Resolve MAC address status.
Possible status are:
Status Description
-- The Resolve MAC address is not enabled.
Resolving The MAC address is being resolved.
Resolved The MAC address is resolved.
Failed The MAC address cannot be resolved.