lan_config man page on DigitalUNIX

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lan_config(8)							 lan_config(8)

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

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

       Changes the specified characteristics for interface_name. You must pro‐
       vide 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 full-duplex)  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 renegoti‐
	      ate  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

	      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 cor‐
	      rect 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)  full-duplex
	      operation	 when  the utp medium is specified.  The default is to
	      disable full-duplex operation.

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

       You  can also use the lan_config command to enable or disable autonego‐
       tiation, 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 implica‐
       tion 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

       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  exe‐
       cuted 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.

       The lan_config command has the following restrictions: You cannot  mod‐
       ify  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.

       To switch from aui or bnc to utp full-duplex operation on  tu0,	enter:
       lan_config  -i tu0 -m utp -x 1 To disable full-duplex operation on tu0,
       enter: lan_config -i tu0 -x 0 To enable autonegotiation on tu1,	limit‐
       ing 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  dis‐
       plays  hardware information, low-level configuration settings, and sta‐
       tistics 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 iden‐
       tifier  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-FF-3E-C5-A5 33-33-00-00-00-01 \
				  09-00-2B-00-00-0F 09-00-2B-02-01-04
	 interface_number = 1
	 link = Up
	 autoneg_enable = 1 .  .

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

       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


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