Manual Pages for UNIX Operating System command usage for man dnet

Devices                                                  dnet(7D)



NAME
     dnet - Ethernet driver for DEC 21040, 21041, 21140  Ethernet
     cards

SYNOPSIS
     /kernel/drv/dnet


DESCRIPTION
     The dnet Ethernet driver is a multithreaded, loadable, clon-
     able,  STREAMS  GLD  driver.  Multiple controllers installed
     within the system are supported  by  the  driver.  The  dnet
     driver  functions  include  controller initialization, frame
     transmit and receive, functional addresses, promiscuous  and
     multicast support, and error recovery and reporting.

APPLICATION PROGRAMMING INTERFACE
     The cloning character-special device, /dev/dnet, is used  to
     access  all  DEC  21040/21041/21140 devices installed in the
     system.


     The dnet driver is dependent on /kernel/misc/gld, a loadable
     kernel  module  that  provides the dnet driver with the DLPI
     and STREAMS functionality required of  a  LAN  driver.   See
     gld(7D)  for more details on the primitives supported by the
     driver.


     The device is  initialized  on  the  first  attach  and  de-
     initialized (stopped) on the last detach.


     The values returned by the driver in the DL_INFO_ACK  primi-
     tive  in response to a DL_INFO_REQ from the user are as fol-
     lows:

         o    The maximum SDU is  1500  (ETHERMTU  -  defined  in
              ).

         o    The minimum SDU is 0.

         o    The DLSAP address length is 8.

         o    The MAC type is DL_ETHER.

         o    The sap length value is -2,  meaning  the  physical
              address  component  is followed immediately by a 2-
              byte sap component within the DLSAP address.

         o    The broadcast address value  is  the  Ethernet/IEEE
              broadcast address (FF:FF:FF:FF:FF:FF).



SunOS 5.11          Last change: 20 OCT 2000                    1






Devices                                                  dnet(7D)



     Once  in  the  DL_ATTACHED  state,  the  user  must  send  a
     DL_BIND_REQ  to  associate a particular Service Access Point
     (SAP) with the stream.

PRECONFIGURATION
     The PCI configuration process varies from system to  system.
     Follow the instructions provided by the vendor.

  Known Problems and Limitations
         o    On multiport cards  (exception:  Osicom  (Rockwell)
              RNS2340),  the  first port is the top port. (On the
              Osicom RNS2340, the first port is the bottom port.)

         o    If the  dnet driver fails to determine the  correct
              speed  and duplex mode resulting in a corresponding
              drop in performance, set the speed and duplex  mode
              using the dnet.conf file.

         o    The dnet driver incorrectly counts carrier lost  or
              no  carrier errors while in full-duplex mode. There
              is no carrier signal present  when  in  full-duplex
              mode and it should not be counted as an error.

         o    Version 4 SROM formats are not supported.

CONFIGURATION
     The  /kernel/drv/dnet.conf  file  supports   the   following
     options:

     full-duplex    For full duplex operation use  full-duplex=1,
                    for  half  duplex  use  full-duplex=0.  Half-
                    duplex  operation  gives  better  results  on
                    older 10mbit networks.


     speed          For  10mbit  operation  use   speed=10,   for
                    100mbit   operation  use  speed=100.  Certain
                    21140 based  cards  will  operate  at  either
                    speed. Use the speed property to override the
                    100mbit default in this case.


FILES
     /dev/dnet                character special device


     /kernel/drv/dnet.conf    dnet configuration file


ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



SunOS 5.11          Last change: 20 OCT 2000                    2






Devices                                                  dnet(7D)



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Architecture                | x86                         |
    |_____________________________|_____________________________|


SEE ALSO
     attributes(5), dlpi(7P), gld(7D) streamio(7I)


     Writing Device Drivers


      STREAMS Programming Guide








































SunOS 5.11          Last change: 20 OCT 2000                    3