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lfa(7)
NAME
  lfa - DAPCA/DAPBA Asynchronous Transfer Mode (ATM) Network Interface

SYNOPSIS
  config-driver	       lfa

DESCRIPTION
  The lfa interface can be either the ATM HE622 ATM adapter (DAPCA) or the
  ATM HE155 ATM adapter (DAPBA), providing transmission rates of 622 megabits
  per second and 155 megabits per second, respectively.	 Both adapters use
  the same driver.

  The lfa driver controls the transmission and reception of data across the
  ATM network over specified Virtual Circuits (VCs).  The creation and
  management of the VCs is controlled by the ATM subsystem software that sits
  above the driver.  When the driver is started, it registers with the ATM
  subsystem and then performs any task that the subsystem requests.

  Note that the transmission rate of the link is not the same as the
  transmission rate as seen by a user application.  The following factors can
  contribute to this: the speed of the Peripheral Component Interconnect
  (PCI) bus, the signaling overhead on the link medium itself, the speed of
  the host processor, and other activity in the system (especially on the
  same PCI bus).

  See the sys_attrs_lfa(5) reference page for a list of thelfa subsystem
  attributes.

ERRORS
  The following diagnostic and error messages contain relevant information
  provided by the lfa interface, and are displayed on the console.  Each
  message begins with the adapter identification, including the adapter
  number (for example, lfa0).

  Unsupported ATM adapter
      Ensure that either a HE622 or HE155 ATM adapter is installed in the
      system and that it is a DAPBA-FA, DAPBA-UA, or DAPCA-FA.

  Adapter initialization failed (ENOMEM)
      The specified adapter failed its initialization due to insufficient
      memory resources.	 This could possibly happen if kernel memory
      debugging was enabled in the /etc/sysconfigtab file.  If this message
      is displayed, the adapter will not operate.

  Could not register with ATM subsystem.

  Please ensure ATM options are configured.
      The driver failed when it tried to register itself with the ATM
      subsystem because the optional ATM components are not configured in the
      kernel.  Reconfigure your kernel with the the ATM, UNI3X, ATMIP, and
      LANE options.  See Asynchronous Transfer Mode for more information.

  Unable to reserve resources for VC (error = errorcode)
      An error occurred when trying to gather the resources necessary (for
      example, memory for data structures and specified bit rate for
      transmission) to set up a Virtual Circuit (VC).

  ENBVC bad VPI vpi#/ VCI vci# specified
      An invalid VPI or VCI value was passed to the VC activation routine.
      Ensure that the values specified fit into the range given for the
      num_vpi_bits attribute described in the "Subsystem Attributes" section.

  Attempting to delete busy VPI vpi#, VCI vci#
      A request to delete a VC was made and the VC was transmitting.  This
      condition did not go away after 1 second so the VC will be deleted
      anyway.  It is possible that the VC's state is inconsistent, and that
      this may indicate a problem with the driver.

  Informational messages contain information provided by the lfa driver.
  These messages are printed on the console and begin with the adapter
  identification, including the adapter number.

  Driver registered with ATM subsystem
      The driver successfully configured and registered itself with the ATM
      subsystem software.

  Link Available
      The connection either to a switch or to another system (in a point-to-
      point configuration) exists.  This message is displayed after the
      driver is initially brought up.  If it is not displayed, it is likely
      there is a problem with the cables.

  Link Unavailable
      The connection either to a switch or to another system existed, but no
      longer exists.

  Adapter shut down
      An administrator issued a command to shut down the adapter.  If you do
      not see this message, the adapter is still operational.  To shut down
      the adapter, use the atmconfig down command.

SEE ALSO
  Commands: netstat(1), atmarp(8), atmconfig(8), atmelan(8), atmsig(8),
  sysconfig(8)

  Attributes: sys_attrs_lfa(5)

  NetworkInformation: arp(7), inet(7), intro(7)

  Asynchronous Transfer Mode

  Network Administration: Connections

Index for Section 7

Alphabetical listing for L

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