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ni(4)									 ni(4)

Name
       ni - BVP DEBNT/NI interface

Syntax
       controller  aie?	   at vaxbi? node?
       device	   bvpni0  at aie? vector bvpniintr

Description
       The driver provides access to a 10 Mb/s Ethernet network through the NI
       port of the DEBNT controller. The DEBNT	also  has  a  tape  port  that
       shares the controller structure with the NI port.

       The  host's  Internet address is specified at boot time with an SIOCSI‐
       FADDR ioctl.   The  driver  employs  the	 Address  Resolution  Protocol
       described  in to dynamically map addresses on the local network between
       Internet and Ethernet.

       The driver normally tries to use a ``trailer'' encapsulation  to	 mini‐
       mize  copying  data  on	input and output.  This can be disabled for an
       interface by setting  the  IFF_NOTRAILERS  flag	with  an  SIOCSIFFLAGS
       ioctl.  Trailers are only used for packets destined for Internet hosts.

       The  SIOCSPHYSADDR ioctl can be used to change and SIOCRPHYSADDR can be
       used to read the physical address of the NI.  SIOCADDMULTI and SIOCDEL‐
       MULTI  can  be  used to add or delete multicast addresses.  The NI sup‐
       ports a maximum of 32 multicast addresses. The argument to  the	latter
       ioctls is a pointer to an ifreq structure found in <net/if.h>.

       SIOCRDCTRS and SIOCRDZCTRS ioctls can be used to ``read'' or ``read and
       clear'' network counters. The argument to the latter two	 ioctls	 is  a
       pointer to a counter structure ``ctrreq found in <net/if.h>.

       The  ioctls  SIOCENABLBACK and SIOCDISABLBACK can be used to enable and
       disable the interface loopback mode respectively.

Restrictions
       The PUP protocol family is not supported.

Diagnostics
       ni%d in wrong state
       DEBNT is unable to be attached during autoconfiguration	time,  because
       it is not in the undefined state.

       ni%d cannot initialize
       DEBNT  failed  to become initialized after a request to become initial‐
       ized.

       nid%d cannot enable
       DEBNT failed to become enabled after a request to become enabled.

       reset ni%d %x %x %x %x
       DEBNT has requested a software reset.  Values  of  port	control,  port
       status,	port  error,  and  port	 data  are given to help identify what
       caused the reset request.

       ni%d SUME error detected %x %x %x %x
       Some error has been detected.  Values of port error,  port  data,  port
       status,	and  port  control are given to help identify the cause of the
       error.

       ni%d cant handle af%d
       A packet with an undefined protocol type has been sent to DEBNT.

       ni%d multi failed, multicast list full
       Too many multicast requests have been made.

See Also
       arp(4p), inet(4f), intro(4n)

				      VAX				 ni(4)

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