64 lines
2.3 KiB
Plaintext
64 lines
2.3 KiB
Plaintext
.\" @(#)ec.4s 1.1 92/07/30 SMI;
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.TH EC 4S "9 October 1987"
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.SH NAME
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ec \- 3Com 10 Mb/s Ethernet interface
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.SH "CONFIG \(em SUN-2 SYSTEM"
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.ft B
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.nf
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device ec0 at mbmem ? csr 0xe0000 priority 3
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device ec1 at mbmem ? csr 0xe2000 priority 3
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.ft R
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.fi
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.SH DESCRIPTION
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.IX "ec device" "" "\fLec\fP \(em 3Com 10 Mb/s Ethernet interface" "" PAGE START
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.IX "3Com 10 Mb/s Ethernet interface ec" "" "3Com 10 Mb/s Ethernet interface \(em \fLec\fP" "" PAGE START
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.IX "10 Mb/s 3Com Ethernet interface ec" "" "10 Mb/s 3Com Ethernet interface \(em \fLec\fP" "" PAGE START
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.IX "Ethernet controller" "ec" "" "\fLec\fP \(em 10 Mb/s 3Com Ethernet interface" PAGE START
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.LP
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The
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.B ec
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interface provides access to a 10 Mb/s Ethernet
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network through a 3\s-1COM\s0 controller.
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For a general description of network interfaces see
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.BR if (4N).
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.LP
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The hardware consumes 8 kilobytes of Multibus memory space.
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This memory is used for internal buffering by the board.
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The board starts at standard addresses 0xE0000 or 0xE2000. The board
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must be configured for interrupt level 3.
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.LP
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The interface software implements an exponential backoff algorithm
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when notified of a collision on the cable.
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.LP
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The interface handles the Internet protocol family,
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with the interface address maintained in Internet format.
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The Address Resolution Protocol
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.BR arp (4P)
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is used to map 32-bit Internet addresses used in
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.BR inet (4F)
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to the 48-bit addresses used on the Ethernet.
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.SH DIAGNOSTICS
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.TP 10
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.B ec%d: Ethernet jammed
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After 16 failed transmissions and
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backoffs using the
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exponential backoff algorithm, the packet was dropped.
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.TP
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.B ec%d: can't handle af%d
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The interface was handed a message with
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addresses formatted in an unsuitable address
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family; the packet was dropped.
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.SH SEE ALSO
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.BR arp (4P),
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.BR if (4N),
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.BR inet (4F)
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.\".br
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.\"3COM 3C400 Multibus Ethernet Controller Reference Manual (Sun 800-0398)
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.SH BUGS
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The interface hardware is not capable of talking to itself, making
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diagnosis more difficult.
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.IX "ec device" "" "\fLec\fP \(em 3Com 10 Mb/s Ethernet interface" "" PAGE END
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.IX "3Com 10 Mb/s Ethernet interface ec" "" "3Com 10 Mb/s Ethernet interface \(em \fLec\fP" "" PAGE END
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.IX "10 Mb/s 3Com Ethernet interface ec" "" "10 Mb/s 3Com Ethernet interface \(em \fLec\fP" "" PAGE END
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.IX "Ethernet controller" "ec" "" "\fLec\fP \(em 10 Mb/s 3Com Ethernet interface" PAGE END
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