The number of LE_ARP_REQUESTs received by this
LES since activation and responded to directly.
This applies to all LE_ARP requests for addresses
registered by LE clients with the LES. Note that a
LES is not required to answer LE_ARP requests directly
and may forward the request on to the control
distribute regardless. This counter does not apply to
those requests the BUS (the broadcast address).