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 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.
Note
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.
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.
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.
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-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
lan_config(8)
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