LA(7)               RISC/os Reference Manual                LA(7)



NAME
     la - AMD 7990 Ethernet interface

SYNOPSIS
     FLAG PREFIX SOFT #DEV DEPENDENCIES
     -    if_la  -    -    bsd,iop

DESCRIPTION
     The la interface provides access to a 10 Mb/s Ethernet net-
     work through an AMD 7990 lance chip.  The interface is built
     into the RC3240 and RC2030 computers.

     The host's network address is specified at boot time with an
     SIOCSIFADDR ioctl, usually generated by the ifconfig(1M)
     application.  The station address is discovered by reading
     an on-board prom.  No packets are sent or accepted until a
     network address is supplied.  The la interface employs the
     address resolution protocol described in arp(7P) to dynami-
     cally map between Internet and Ethernet addresses on the
     local network.

     The interface handles both Internet and the optional DECnet
     protocol families. Internet trailer protocols will be
     received by the interface, however packets using the trailer
     protocol will not be originated by the interface.

SEE ALSO
     ifconfig(1M), netstat(1M), arp(7P), if(7N), inet(7F),
     ip(7P), syslogd(8).

DIAGNOSTICS
     set_lance: Ethernet Address: %s
               At boot time '%s' is replaced by a six byte
               hardware address and is a normal part of the con-
               figuration process.

     Lance has lost TXON nn.
               The chip has stopped transmitting, and the driver
               will proceed to re-initialize the interface.  This
               should not be a common occurrence, and may indi-
               cate problems with the ethernet transceiver or
               cable.

     Lance packet > buffer size, missing
               The driver has received an illegal packet from the
               ethernet.  The packet exceed the maximum transmis-
               sion size for ethernet.

     laget: ifp mget failed.
               Indicates that the system has depleted its network
               memory buffers at an inopportune moment.




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LA(7)               RISC/os Reference Manual                LA(7)



     laioctl: SIOCIFF reset.
     laioctl: SIOCIFF lainit.
               These informative messages indicate that the
               interface has been reset or initialized.  They
               will generally follow an ifconfig(1M) command.

     BABBLE Packet from Lance
               The lance chip has detected a packet larger than
               the maximum ethernet transmission size.  This may
               indicate a problem with protocol software on this
               machine.

     Lance No Heartbeat
               The lance chip has noted that the heartbeat SQE
               signal is not present on the ethernet. This will
               generally indicate a cabling or transceiver prob-
               lem.






































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