fta(7)							 Miscellaneous Information Manual						    fta(7)

NAME

       fta - DEFTA, DEFPA, and DEFEA FDDI Network Interfaces

SYNOPSIS

       config_driver fta

       This is the entry in the configuration file.

DESCRIPTION

       The fta interface can be a high-speed TURBOchannel (DEFTA), PCI (DEFPA), or EISA (DEFEA) adapter to a 100 megabit per second Fiber Distrib-
       uted Data Interface (FDDI) timed token ring network.  The fta interface provides the host system with a direct FDDI network connection  and
       enables the host to function as a station capable of transmitting, receiving, and repeating data on the ring.

       The  adapter uses DMA transfers for both transmitted and received data. The driver initializes the DMA engine before placing the adapter on
       the ring.

       The adapter can operate in full duplex mode.  To allow the fta interface to operate in full duplex mode, connect two like adapters back-to-
       back.  The full duplex mode is enabled or disabled by using the fddi_config command.

       The host's Internet address is specified at boot time with an SIOCSIFADDR ioctl.  The fta interface employs the address resolution protocol
       described in arp(7) to map dynamically between Internet and physical addresses on the FDDI ring.

       The maximum frame size for the fta interface is 4500 bytes, which is substantially larger that the 1500 bytes maximum packet  size  of  the
       Ethernet interfaces. The fta interface does not support the BSD trailer encapsulation, which is specific to the VAX architecture.

       The  SIOCRPHYSADDR ioctl can be used to read the physical address of the adapter. The physical address of the adapter can be changed by use
       of the SIOCSPHYSADDR ioctl.

       The SIOCADDMULTI and SIOCDELMULTI ioctls can be used to add or delete  multicast  addresses.  The  adapter  supports  up  to  62  multicast
       addresses.

       The  SIOCRDCTRS	ioctl  can be used to read the FDDI driver counters.  The adapter status and characteristics can also be read through this
       ioctl by providing  one	of  the  following  flags:  FDDI_STATUS,  CTR_FDDI,  CTR_FDDI_EXTENDED,  FDDIMIB_PATH,	FDDIMIB_SMT,  FDDIMIB_MAC,
       FDDIMIB_PORT, and FDDIMIB_ATTA.	The argument to this ioctl is a pointer to a counter or status structure, ctrreq, found in <net/if.h>.

       The  SIOCENABLBACK  and	SIOCDISABLBACK ioctls can be used to enable and disable the interface loopback mode, respectively. The driver sup-
       ports internal loopback only.

       The SIOCIFRESET ioctl can be used to reset the adapter.

EXAMPLES

       To obtain the physical address of the adapter, use the SIOCRPHYSADDR  ioctl  as	in  the  following  program  example:  #include  <stdio.h>
       /*  standard  I/O  */ #include <errno.h> 	     /* error numbers */ #include <sys/socket.h>	 /* socket definitions */ #include
       <sys/ioctl.h>	      /* ioctls */ #include <net/if.h>		   /* generic interface structures */

       main() {
	 int s,i;
	 static   struct  ifdevea  devea;
	 /* Get a socket */
	 s = socket(AF_INET,SOCK_DGRAM,0);
	 if (s < 0) {
	    perror("socket");
	    exit(1);
	 }
	 strcpy(devea.ifr_name,"fta0");
	 if (ioctl(s,SIOCRPHYSADDR,&devea) < 0) {
	    perror(&devea.ifr_name[0]);
	    exit(1);
	 }
	 printf("Address is ");
	 for (i = 0; i < 6; i++)
	    printf("%X ", devea.default_pa[i] & 0xff);
	 printf("
");
	 close(s); }

       To reset the adapter, use the SIOCIFRESET ioctl as in the following program example: #include <stdio.h>		     /*  standard  I/O	*/
       #include  <errno.h>		 /*  error  numbers  */  #include  <sys/socket.h>	   /* socket definitions */ #include <sys/ioctl.h>
       /* ioctls */ #include <net/if.h> 	    /* generic interface structures */

       main() {
	 int s;
	 struct  ifreq	data;
	 /* Get a socket */
	 s = socket(AF_INET,SOCK_DGRAM,0);
	 if (s < 0) {
	    perror("socket");
	    exit(1);
	 }
	 strcpy(data.ifr_name,"fta0");
	 if (ioctl(s,SIOCIFRESET,&data) < 0) {
	    perror("SIOCIFRESET:");
	    exit(1);
	 }
	 close(s); }

ERRORS

       Diagnostic messages contain information provided by the fta driver and the adapter. The following messages contain  information	about  the
       adapter's state, and are printed on the console, where n is the adapter number:

       Once in the DMA Available state, the adapter goes to the Link Unavailable state and finally to the Link Available state.

       The following messages contain information about adapter events: The adapter received a directed beacon.  The adapter has detected a dupli-
       cate token. On point-to-point links, this can occur when going into full-duplex mode, and is not a problem.  There is a parity error on the
       host bus.  The adapter received an illegal length packet. A station on the ring is transmitting illegal length packets. This might indicate
       a router problem.  A link transmit underrun occurred.  A link transmit failure occurred.  The adapter has detected a CRC error. This can be
       either  a  transmit  or	receive  station problem. If this occurs intermittently, the cable connectors might be dirty.  If this is a steady
       problem and from the same source, the transmitting station's adapter is faulty.	The adapter has detected a parity error in the packet mem-
       ory.   A PC Trace has been initiated.  The adapter received a PC trace.	The adapter's receive queue is full and packets are being dropped.
       A ring beacon was initiated.  A ring purge error has occurred.

       The following are diagnostic error messages about driver events: The driver could not start the thread that perform  error  recovery.  This
       error  is  not fatal. If an error occurs, the driver will not reinitialize the adapter.	The adapter cannot transition to the DMA Available
       state.  A fatal error occurred, and the driver cannot recover. The driver is off line.  The adapter self test failed.  The driver  accessed
       an illegal location on the adapter.

RELATED INFORMATION

       Commands: netstat(1), fddi_config(8).

       Network Information: arp(7), inet(7), intro(7).

       fta Subsystem Attributes: sys_attrs_fta(5).  delim off

																	    fta(7)