LNA(4N)                 COMMAND REFERENCE                 LNA(4N)



NAME
     lna - local network interface

DESCRIPTION
     The lna interface provides access to a 10 Mb/s IEEE 802.3
     (Ethernet) network on 6130 system workstations.

     The host's Internet address is set from the on board NVRAM,
     but may be changed with an SIOCSIFADDR ioctl and family
     AF_INET.  The host's IEEE 802.3 (Ethernet) address is also
     set from the NVRAM.

     Use netconfig(8n) to change the Internet address.  The
     Ethernet address should not be changed.

     The lna interface employs the address resolution protocol
     described in arp(4n) to dynamically map between Internet and
     Ethernet addresses on the local network.

     A Time Domain Reflectometer measurement can be made with the
     SIOCTDR ioctl.  The return value has the following form:

     struct tdr {
           unsigned short tdr_ok:1,    /* link okay */
                          tdr_prb:1,   /* transceiver problem */
                          tdr_open:1,  /* cable open */
                          tdr_srt:1,   /* cable shorted */
                          :1,
                          tdr_time:11; /* reflection time */

     };

DIAGNOSTICS
     lna0: low on mbufs.  A packet was dropped because the system
     was temporarily low on network buffers.

     lna0: can't handle af%d.  The interface was handed a message
     with addresses formatted in an unsuitable address family;
     the packet was dropped.

CAVEATS
     The current versions of the link controller and interface
     chip sometimes produce incorrect TDR results.

SEE ALSO
     intro(4N), inet(4N), arp(4N), ioctl(2).









Printed 10/17/86                                                1

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di:1413,559;
ca:1972,165;
se:2137,150;
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