EN(4) — System Manager’s Manual — Special Files
NAME
en − Sun 3 Mb/s experimental Ethernet interface
DESCRIPTION
The en interface provides access to a 3 Mb/s Ethernet network. The host’s address is discovered at boot time by probing the Ethernet address register.
The board consumes 256 bytes of Multibus I/O space starting at standard address 0x100. The board must be configured for interrupt level 3.
The interface handles both Internet and PUP protocol families, with the interface address maintained in Internet format. PUP addresses are converted to Internet addresses by subsituting PUP network and host values for Internet network and imp values, and setting the Internet host number to zero.
DIAGNOSTICS
en%d: output error. The hardware indicated an error on the previous transmission.
en%d: send error. After 16 retransmissions using the exponential backoff algorithm described above, the packet was dropped.
en%d: input error. The hardware indicated an error in reading a packet off the cable.
en%d: can’t handle af%d. The interface was handed a message with addresses formatted in an unsuitable address family; the packet was dropped.
SEE ALSO
BUGS
This hardware is not supported.
Sun System Release 0.3 — 2 May 1983