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 atmloop(1M)							 atmloop(1M)




 NAME
      atmloop - test cell reception and transmission of an ATM interface

 SYNOPSIS
      /usr/sbin/atmloop card_inst_num [count]

 DESCRIPTION
      atmloop verifies the complete transmit and receive path of a single
      ATM interface. It is usually invoked for diagnostic purposes to
      determine if an interface is working properly. It requires a loopback
      hood to be plugged into the external connector.

      Every three seconds atmloop opens a PVC loopback connection using
      alternatively the SONET and SDH physical layer types, sends and then
      receives count messages through the cable and prints the transfer
      success rate of the current set of messages.

      To stop atmloop execution, send an interrupt signal (or press CTRL+C).

      The ATM interface must be stopped to run the atmloop command (use the
      atmstop(1M) command), so access to the network is interrupted during
      execution, and existing IP applications may be disrupted.

      You must be superuser to use the atmloop command.


    Arguments
      card_inst_num	The card instance number of the ATM adapter. No
			default. This is the logical unit number of the ATM
			adapter. (run the command ioscan -f to get it).

      count		The number of messages atmloop will transfer each
			second.
			Default: it sends 5 messages each cycle.

 RETURN VALUE
      atmloop returns 1 if it was unable to start the test. It returns 0 on
      normal completion (interruption signal).


 AUTHOR
      atmloop was developed by HP.

 SEE ALSO
      atminit(1M), atmstop(1M), atmmgr(1M), atmcheck(1M), atmserver(1M)









				    - 1 -	  Formatted:  August 2, 2006