moptrace —
MOP Trace Utility
  
    | moptrace | [ -a] [-d]
      [-3|-4] | 
  
    | moptrace | [ -d] [-3|-4] [interface] | 
moptrace prints the contents of MOP packages on the
  Ethernet connected to interface or all known interfaces
  if ‘-a’ is given.
  - -a
- Listen on all the Ethernets attached to the system. If
      ‘-a’ is omitted, an interface must
      be specified.
- -d
- Run in debug mode, with all the output to stderr.
- -3
- Ignore MOP V3 messages (Ethernet II).
- -4
- Ignore MOP V4 messages (Ethernet 802.3).
mopchk(1),
  mopcopy(1),
  mopprobe(1),
  mopd(8)DECnet Digital Network
    Architecture Phase IV, Maintenance Operations
    Functional Specification V3.0.0,
    AA-X436A-TK.
DECnet Digital Network
    Architecture, Maintenance Operations Protocol
    Functional Specification V4.0.0,
    EK-DNA11-FS-001.