NAME

     PVC - Interphase S/ATM 4615 adapter PVC Interface

CONFIG

     PVC

AVAILABILITY

     This interface is available as an evaluation tool  from  the
     Interphase  S/ATM 4615 software distribution.  It is part of
     the evaluation PVC driver interface which supports  IP  over
     ATM  PVCs  and  uses  RFC1483 IP LLC/SNAP encapsulation.  It
     also has options for supporting Null  IP  encapsulation  and
     defining transmit rate maximums on a per VC basis.

DESCRIPTION

     The IP over ATM PVC interface simply  uses  the  system  ARP
     table  to  map  an  IP  address  to a PVC VCI value which is
     stored as a pseudo MAC address.  The  interface  is  managed
     via  the  pvcarp(8)  command.   The  PVC value value is then
     passed down to the ATM driver by the IP/Ethernet  interface.
     The  ATM  driver  uses the VCI as a lookup for a PVC defini-
     tion, which was created with the pvcarp command.  By default
     all PVCs will use AAL5 encapsulation.  The current implemen-
     tation requires the system administrator to  configure  each
     PVC vc that is to be used. This can be done either individu-
     ally or via the file option of the pvcarp(8) utility.   Con-
     figuration  scripts  using these command could be run out of
     /etc/rc.local to facilitate automatic PVC configuration.

     IP frames being sent between systems are  encapsulated  with
     LLC/SNAP headers as per RFC 1483. They are then encapsulated
     again as AAL5 frames, also as per RFC 1483.

     ARP and InARP are not supported.  Multicast  and  broadcasts
     are  not supported.  The purpose of the interface to to gain
     interoperability experience at a simple PVC level, with some
     VC definition flexibility.

SEE ALSO

     arp(8C), pvcarp(8), vctbl(8)