Content-type: text/html Man page of fza

fza

Section: Environments, Tables, and Troff Macros (7)
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NAME

fza - DEFZA FDDI Network Interface  

SYNOPSIS

controller fza0 at *  

DESCRIPTION

The fza interface is a high speed TURBOchannel bus to a 100 Mbit/second Fiber Distributed Data Interface (FDDI) timed token ring network adapter. The fza interface allows the host system to be an FDDI single attachment station.

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

The Maximum Transmit Unit (MTU) size for fza interface is 4352 bytes, which is substantially larger that the 1500 bytes maximum packet size of the Ethernet interfaces. The fza interface does not support the BSD trailer encapsulation.

The SIOCRPHYSADDR ioctl can be used to read the physical address of the DEFZA adapter. The physical address of the DEFZA adapter cannot be changed.

The SIOCADDMULTI and SIOCDELMULTI ioctls can be used to add or delete multicast addresses. The DEFZA supports up to 64 multicast addresses. The argument to the latter ioctls is a pointer to an ifreq structure found in <net/if.h>.

The SIOCRDCTRS ioctl can be used to read the FDDI driver counters. The DEFZA adapter status and characteristics can also be read through this ioctl by providing an FDDI_STATUS flag. 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 SIOCEEUPDATE ioctl can be used to update the adapter's firmware.

The SIOCIFRESET ioctl can be used to reset the adapter.

Some of the FDDI link characteristics can be changed by the SIOCIFSETCHAR ioctl. These characteristics include Request Token Rotation Time (T_REQ), Valid Transmission Time, Link Error Monitor (LEM) Threshold, Restricted Token Timeout, and Ring Purger Enable. The latter two characteristics are supported by the firmware revision V1.2 and higher. The T_REQ, Valid Transmission Time, and Restricted Token Timeout value are based on 80 ns units. The setable FDDI attributes are shown in the following table.

Attribute NameRangeDefault Value
Requested Token Rotation Time4.0ms to 167.77208ms8.0ms
Valid Transmission Time2.35ms to 5.2224ms2.621ms
Restricted Token Timeout0ms to 10000ms1000ms
LEM Threshold5 to 88
Ring Purger EnableTrue or FalseTrue

For a LEM Threshold attribute value of N, the threshold value is 10 of power -N. The Ring Purger can be disabled by setting the Ring Purger Enable field value to zero. The unchanged characteristics need to be filled by a -1 or 0xffffffff value. The argument to this ioctl is a pointer to an ifchar structure found in <net/if.h>. To set the FDDI link characteristics, use the following form:

ioctl(s, SIOCIFSETCHAR, ifchar)

struct ifchar *ifchar;

The following example changes the Restricted Token Timeout value to 16ms and disables the Ring Purger mode:

int s ; struct ifchar ifchar;


        if((s = socket( AF_INET, SOCK_DGRAM, 0 )) < 0 )
                exit(1);


        strcpy(&ifchar.ifc_name[0],"fza0");


        ifchar.ifc_treq = 200000 ;     /* 200000 * 80 ns = 16 ms */
        ifchar.ifc_rtoken = -1;        /* unchanged */
        ifchar.ifc_tvx = -1;           /* unchanged */
        ifchar.ifc_lem = -1;           /* unchanged */
        ifchar.ifc_ring_purger = 0 ;   /* disable the ring purger */


        if(ioctl( s, SIOCIFSETCHAR, &ifchar) < 0 )
                exit(1);

The FDDI link characteristics can be displayed by using the following command:

netstat -I interface -s

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,"fza0");
  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("\n");
  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,"fza0");
  if (ioctl(s,SIOCIFRESET,&data) < 0) {
     perror("SIOCIFRESET:");
     exit(1);
  }
  close(s); }  

ERRORS

Diagnostic error messages contain information provided by the fza driver. For example: The DEFZA adapter did not pass the power-up selftest during autoconfiguration. The DEFZA adapter cannot be initialized. The DEFZA adapter went to the Halt state because of an adapter firmware fault. The network link went down which means than the station is not on the FDDI ring. A Ring Initialization unsolicited event has been received from the fza%d interface. An invalid T_REQ value was discovered by the adapter while user was trying to change the FDDI link characteristics.  

RELATED INFORMATION

netstat(1), arp(7), inet(7), fddi_config(8) delim off


 

Index

NAME
SYNOPSIS
DESCRIPTION
ERRORS
RELATED INFORMATION

This document was created by man2html, using the manual pages.
Time: 02:40:27 GMT, October 02, 2010