qe(4)
NAME
qe − DEQNA 10 Mb/s Ethernet interface
DESCRIPTION
The qe interface provides access to a 10 Mb/s Ethernet network through the DEC DEQNA controller.
The host’s Internet address is specified at boot time with an SIOCSIFADDR ioctl. The qe interface employs the address resolution protocol described in arp(4p) to map dynamically between Internet and Ethernet addresses on the local network.
The interface normally tries to use a trailer encapsulation to minimize copying data on input and output. This may be disabled, on a per-interface basis, by setting the IFF_NOTRAILERS flag with an SIOCSIFFLAGS ioctl.
DIAGNOSTICS
There are many possible diagnostic error messages. These messages normally contain the relevant information that the DEQNA provides. If, for example the Ethernet cable is shorted, an error message will be printed in which the registers will indicate a lost carrier.