Library /sys$common/syshlp/ncphelp.hlb LOOP, CIRCUIT, Examples  *Conan The Librarian (sorry for the slow response - running on an old VAX)

      NCP>LOOP CIRCUIT DMC-0 COUNT 5 LENGTH 20

          This command initiates a circuit-level loopback test
          over circuit DMC-0.  The software loops five
          messages, 20 bytes in length with mixed binary
          information.

      NCP>LOOP CIRCUIT UNA-0 PHYSICAL ADDRESS AA-00-04-00-FF-04

          This command initiates a circuit-level loopback test
          with a node whose physical address is AA-00-04-00-FF-04.

      NCP>LOOP CIRCUIT UNA-0 NODE 3.224

          This command initiate an Ethernet circuit-level
          loopback test with a node whose address is 3.224.  In
          this example, the NODE parameter with a node-id of 3.224
          was used in place of the PHYSICAL ADDRESS parameter.

      NCP>LOOP CIRCUIT UNA-0 PHYSICAL ADDRESS -
      _ AA-00-04-00-12-04 ASSISTANT NODE GULL HELP RECEIVE

          This command initiates a circuit-level loopback test by
          transmitting a message directly to a node whose physical
          address is AA-00-04-00-12-04.  Additionally, the command
          requests the assistance of a node named GULL to receive the
          message from the target node and then relay the message back.