tra(7)tra(7)NAMEtra - DETRA 4 Mb/s or 16 Mb/s Token Ring interface
SYNOPSIS
config_driver tra
Entry in the system configuration file.
DESCRIPTION
The tra interface is a Token Ring TURBOchannel adapter that can operate
at 4 Mb/s or 16 Mb/s. The adapter uses a TMS380 chip to implement the
Token Ring protocol.
The host's Internet address is specified at boot time with a SIOCSI‐
FADDR ioctl. Also the speed at which the interface should operate can
be specified using the SIOCSMACSPEED ioctl. The default speed at which
the interface will try and enter the ring is at 16 Mb/s. The other
supported speed is 4 Mb/s. ifconfig(8) describes how to set the speed
of the interface by using the speed option.
The maximum MAC frame size supported by the driver on a 4 Mb/s Token
Ring network is 4136 and for a 16 Mb/s network it is 8232.
The SIOCRPHYSADDR ioctl can be used to read the physical address of the
DETRA adapter.
The SIOCADDMULTI and SIOCDELMULTI ioctls can be used to add or delete
functional addresses.
The SIOCRDCTRS ioctl can be used to read the Token Ring driver coun‐
ters. The DETRA adapter status and characteristics can also be read
through this ioctl by providing one of the following options: Reads the
counters Reads the characteristics Reads the RFC 1231 mib entry Reads
the RFC 1231 status entry
The driver does not support reporting information on the timer statis‐
tics as defined in RFC 1239.
The argument to this ioctl is a pointer to a counter or status struc‐
ture, ctrreq, found in <net/if.h>. The structures defining the Token
Ring counters and status maintained can be found in <netinet/if_trn‐
stat.h>.
The SIOCENABLBACK and SIOCDISABLBACK ioctls can be used to enable and
disable the interface loopback mode, respectively. The driver enables
internal loopback only.
The SIOCIFRESET ioctl can be used to reset the adapter.
ERRORS
Diagnostic messages contain information provided by the tra driver and
the adapter. The following messages contain information about the
adapter's state, and are printed on the console. Each message begins
with the adapter identification, including the number of the adapter:
The driver received an adapter check interrupt. The reason for the
interrupt is displayed. The driver could not get an aligned address
for the System Status Block (SSB). (See Texas Instruments, TMS380 Sec‐
ond-Generation Token Ring User's Guide for an explanation of SSB.) The
Bring Up Diagnostics (BUD) failed. The value of the command/status
register and the reason for the failure are displayed. The driver
received an unknown interrupt. An error while trying to write out the
initialization block to the TMS380 Token Ring chip. The value of the
command/status register is displayed in hexadecimal. The MAC_CLOSE
command returned an unknown status to the driver. A request to close
the MAC was previously issued to the adapter. A request to open the
MAC was previously issued to the adapter. The command to open the MAC
was rejected. The reason is displayed. The driver opened the adapter
into the ring at the speed indicated. Only two speeds are supported -
4 Mb/s and 16 Mb/s. If either message is displayed, reset the adapter
by issuing the following commands: % ifconfig tra0 down % ifconfig tra0
up
If the message persists, an error is occurring while transmit‐
ting and receiving packets. You will need to investigate the
error. The status of the ring. The driver has taken the
adapter off the ring. A timeout occurred while waiting for the
MAC_READ_ERROR_LOG command to complete. A timeout occurred
while trying to close the MAC; the interface is down. A timeout
occurred while waiting for the MAC_OPEN command to complete.
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 defini‐
tions */ #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,"tra0");
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 defini‐
tions */ #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,"tra0");
if (ioctl(s,SIOCIFRESET,&data) < 0) {
perror("SIOCIFRESET:");
exit(1);
}
close(s); }
SEE ALSOnetstat(1), ifconfig(8), srconfig(8)
Network Programmer's Guide
tra(7)
