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  man pages->Tru64 Unix man pages -> lan_config (8)              



NAME    [Toc]    [Back]

       lan_config  -  Modifies low-level configuration parameters
       for a given LAN interface

SYNOPSIS    [Toc]    [Back]

       /usr/sbin/lan_config -i interface_name [-a [0  |  1]]  [-m
       [aui | bnc | utp | fiber]] [-s [10 | 100 | 1000]] [-x [0 |

OPTIONS    [Toc]    [Back]

       Changes the specified characteristics for  interface_name.
       You  must  provide an interface name.  Enables (1) or disables (0) IEEE 802.3u autonegotiation. This option applies
       only  to those devices that are capable of autonegotiation
       (for example, DE500-AA and DE500-BA).  When  enabled,  the
       interface  automatically  negotiates  the  link speed (10,
       100, or 1000 Mb/s) and  the  mode  (half-duplex  or  fullduplex)
 with the remote interface.


              The interface initiates the autonegotiation process
              only if and when it is up and running.  See  ifconfig(8)  for  information  on  how  the interface is
              marked up.

              For DE5xx devices, the interface  initially  advertises
 the speed and mode previously selected at the
              console level or with the -s and -x  options.   The
              -s and -x options may also be specified on the same
              command line as the -a option to redefine and renegotiate
  the  interface's capability (when enabled)
              or to force the interface at a  certain  configuration
  (when disabled).  Changes the type of medium.
              The following table lists the supported types:

              Type    Meaning
              aui     10Base5, or thick wire
              bnc     10Base2, or ThinWire
              utp     10BaseT (if speed is 10 Mb/s) or 100BaseT (if speed
                      is 100 Mb/s), or twisted-pair
              fiber   100BaseFX only

              On  some devices, for example, DE435 and DE425, bnc
              selection is done by  means  of  an  on-board  gang
              jumper.   When  specifying  aui  or  bnc  for these
              devices, be sure that the jumper is in the  correct
              position.   Changes the medium speed, if the interface
 is capable of operating at  both  regular  (10
              Mb/s),  fast  (100  Mb/s),  and gigabit (1000 Mb/s)
              Ethernet speeds.  The default is 10 Mb/s.  The fast
              and  gigabit  speeds cannot be selected for the aui
              and bnc media.  Enables (1) or disables  (0)  fullduplex
  operation when the utp medium is specified.
              The default is to disable full-duplex operation.

DESCRIPTION    [Toc]    [Back]

       The lan_config command allows you to modify  the  type  of
       medium,  speed,  and  mode  of  operation  (half- or fullduplex).

       You can also use the lan_config command to enable or  disable
  autonegotiation,  if  the underlying device has this
       capability.  Autonegotiation is a  hardware  and  software
       (driver)  process that allows determination of the highest
       common speed and duplex (half or full) configuration.  The
       permitted  combinations  of speed and mode of operation in
       descending order of precedence, from the  highest  to  the
       lowest, are:

       Speed       Mode
       1000 Mb/s   full-duplex
       1000 Mb/s   half-duplex
       100 Mb/s    full-duplex
       100 Mb/s    half-duplex
       10 Mb/s     full-duplex
       10 Mb/s     half-duplex

       During  autonegotiation,  for example, if the local interface
 advertises that it is capable of 100 Mb/s half-duplex
       operation,  it  is by implication also capable of 10 Mb/s,
       full-duplex and 10 Mb/s, half-duplex  operation.   If  the
       remote interface advertises that it is capable of 10 Mb/s,
       full-duplex operation only, the link is established at  10
       Mb/s,  full-duplex.   The autonegotiation process can take
       several seconds to complete.

       For DE5xx devices (tu), the characteristics  managed  with
       the lan_config command are ordinarily set from the console
       level  via  the  EWx0_MODE  environment   variable.    The
       lan_config command allows you to override this default and
       configure the interface as needed after the system  is  up
       and  running.   For  all  other  devices, you must use the
       lan_config command to configure the interface.

       Modifications you make with the lan_config command do  not
       persist  across  reboots of the operating system.  To configure
 the interface or modify  the  parameters  automatically
  each time the system is booted, edit the inet.local
       file and add the lan_config command entries to it.

       You can also use the ifconfig command to set the speed and
       mode  (half-  or full-duplex) either from the command line
       or in the inet.local file.  If you specify the command  in
       the inet.local file, the command is executed each time the
       system is booted.

       When  you  are  finished  making  low-level  configuration
       changes with either the lan_config command or the ifconfig
       command, you can use the hwmgr  utility  to  verify  these
       changes.  See  the EXAMPLES section of this reference page
       for more information.

RESTRICTIONS    [Toc]    [Back]

       The lan_config command has the following restrictions: You
       cannot   modify  the  parameters  of  a reserved interface
       (RESERVED flag is set).  Instead,  specify  the  reserving
       NetRAIN  or  Link  Aggregation  virtual  interface.   VLAN
       interfaces cannot be modified.

       You can configure only tu interfaces  (DE5xx)  by  setting
       the appropriate console environment variables.

EXAMPLES    [Toc]    [Back]

       To  switch from aui or bnc to utp full-duplex operation on
       tu0, enter: lan_config -i tu0 -m utp -x 1 To disable fullduplex
  operation on tu0, enter: lan_config -i tu0 -x 0 To
       enable autonegotiation on tu1, limiting capability to  100
       Mb/s, half-duplex operation, enter: lan_config -i tu1 -a 1
       -s 100 -x 0 To disable autonegotiation on tu1, forcing  10
       Mb/s, half-duplex operation, enter: lan_config -i tu1 -a 0
       -s 10 -x 0

       You can use the hwmgr utility  to  verify  the  parameters
       that you change with the lan_config and ifconfig commands.
       The following command displays hardware information,  lowlevel
  configuration settings, and statistics counters for
       all of the physical network  adapters  installed  on  your
       system: # hwmgr get attribute -category network 18:
         name = ee0
         category = network
         sub_category = Ethernet
         model = Intel 82558 .  .  19:
         name = ee1
         category = network
         sub_category = Ethernet
         model = Intel 82558

       .  .  56:
         name = ee2
         category = network
         sub_category = Ethernet
         model = Intel 82559 .  .

       Each  adapter is preceded by a unique hardware identifier,
       such as 18, 19, or 56 in the previous example.  If  necessary,
  you  can use this identifier to display information
       for a specific card, as follows: # hwmgr get attribute -id
       18 18:
         name = ee0
         category = network
         sub_category = Ethernet
         model = Intel 82558
         hardware_rev = 5
         firmware_rev =
         MAC_address = 00-08-02-3E-C5-A5
         MTU_size = 1500
         media_speed = 10
         media_selection = Automatic
         media_type = Unshielded Twisted Pair (UTP)
         loopback_mode = 0
         promiscuous_mode = 0
         full_duplex = 0
         multicast_address_list        =        CF-00-00-00-00-00
       01-00-5E-00-00-01 \
       33-33-00-00-00-01 \
         interface_number = 1
         link = Up
         autoneg_enable = 1 .  .

       For more information about the hwmgr utility, see Hardware
       Management and hwmgr(8).

SEE ALSO    [Toc]    [Back]

       Commands: hwmgr(8), ifconfig(8)

       Files: inet.local(4)

       Interfaces:  alt(7),  bcm(7), ee(7), fza(7), le(7), ln(7),
       tra(7), tu(7)

       Network Administration: Connections

       Hardware Management

[ Back ]
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