61 lines
1.9 KiB
Groff
61 lines
1.9 KiB
Groff
.\" $FreeBSD$
|
|
.\"
|
|
.Dd December 29, 1997
|
|
.Dt EN 4 i386
|
|
.Os
|
|
.Sh NAME
|
|
.Nm en
|
|
.Nd device driver for Midway-based ATM interfaces
|
|
.Sh SYNOPSIS
|
|
.Cd "device en"
|
|
.Cd "device atm"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
device driver supports Midway-based ATM interfaces including the
|
|
Efficient Networks, Inc. ENI-155 and Adaptec ANA-59x0.
|
|
Midway is an ALL5 SAR (Segmentation and Reassembly) chip.
|
|
.Pp
|
|
The driver only supports ATM PVCs. SVC or ATM-ARP is not supported.
|
|
.Pp
|
|
To configure the card for IP, use something like:
|
|
.Dl # ifconfig en0 128.252.200.1 netmask 0xffffff00 up
|
|
To add a PVC to a host you must use the ``route'' command:
|
|
.Dl # route add -iface <remote IP address> -link en0:z.0.x.y
|
|
where x and y are the byte encoding of the VCI to use, and z is the
|
|
byte encoding of the following flags.
|
|
.Dl 0x01 (use AAL5),
|
|
.Dl 0x02 (if using AAL5, use a LLCSNAP header)
|
|
Thus, parameter 3 means AAL5 and LLC/SNAP encapsulation.
|
|
Note that BPF works only with LLC/SNAP encapsulation.
|
|
.Sh EXAMPLES
|
|
Suppose you have 2 hosts 128.252.200.1 and 128.252.200.2 connected
|
|
by ATM through PVC # 201 (0xc9).
|
|
To enable the link use the following commands:
|
|
.Dl on host 128.252.200.1:
|
|
.Dl # ifconfig en0 128.252.200.1 netmask 0xffffff00 up
|
|
.Dl # route add -iface 128.252.200.2 -link en0:3.0.0.c9
|
|
.Pp
|
|
.Dl on host 128.252.200.2:
|
|
.Dl # ifconfig en0 128.252.200.2 netmask 0xffffff00 up
|
|
.Dl # route add -iface 128.252.200.1 -link en0:3.0.0.c9
|
|
.Sh DIAGNOSTICS
|
|
.Bd -literal
|
|
en0 <Efficient Networks ENI-155p> rev 0 int a irq 5 on pci0:16
|
|
en0: ATM midway v0, board IDs 6.0, Utopia (pipelined), 512KB on-board RAM
|
|
en0: maximum DMA burst length = 64 bytes
|
|
en0: 7 32KB receive buffers, 8 32KB transmit buffers allocated
|
|
.Ed
|
|
.Sh CAVEATS
|
|
The driver extensively uses DMA on PCI.
|
|
The first
|
|
generation PCI chipsets do not work or exhibit poor performance.
|
|
.Sh SEE ALSO
|
|
.Xr ifconfig 8 ,
|
|
.Xr route 8
|
|
.Sh AUTHORS
|
|
.An Chuck Cranor
|
|
of Washington University implemented EN driver
|
|
in 1996 for
|
|
.Nx .
|