fza(4)
Name
fza − device driver for DEFZA FDDI Network Interface
Syntax
device fza0 at ibus? vector fzaintr
Description
The fza is a network device driver that controls a DEFZA. The DEFZA is a TURBOchannel 100 Mbit/second Fiber Distributed Data Interface (FDDI) timed token ring network adapter. The fza device driver 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 device driver employs the address resolution protocol described in arp() to map dynamically between Internet and FDDI addresses on the local network.
The maximum frame size for the DEFZA interface is 4500 bytes, which is substantially larger that the 1500 bytes maximum packet size of the Ethernet interfaces. The fza device driver 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 DEFZA adapter. The physical address of the DEFZA adapter can not 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 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 a 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.
Diagnostics
Diagnostic error messages contain information provided by the fza device driver. For example:
fza%d: fzaprobe selftest failed
The DEFZA adapter did not pass the power-up selftest during autoconfiguration.
fza%d: port init failed
The DEFZA adapter cannot be initialized.
fza%d: port in the Halt State -> CNS hardware fault
The DEFZA adapter went to the Halt state because of an adapter firmware fault.
fza%d: LINK unavailable
The network link went down which means that the station is not on the FDDI ring.
fza%d: Ring Init Received
A Ring Initialization unsolicited event has been received from the FDDI ring by the fza device driver through the DEFTA interface.