61 lines
1.6 KiB
Groff
61 lines
1.6 KiB
Groff
.\" $FreeBSD$
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.\"
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.Dd June 3, 2003
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.Dt IDT 4
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.Os
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.Sh NAME
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.Nm idt
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.Nd device driver for IDT NICStAR-based ATM interfaces
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.Sh SYNOPSIS
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.Cd "device idt"
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.Cd "device atm"
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.Sh DESCRIPTION
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The
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.Nm
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device driver supports ATM network interfaces based on the
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IDT NICStAR 77211 controller, including the FORE Systems
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ForeRunner LE25 and LE155.
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For configuring the card for IP see
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.Xr natmip 4 .
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.Pp
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ATM CBR connections are supported, and bandwidth is allocated in
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slots of 64k each.
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Three VBR queues handle traffic for VBR and UBR.
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Two UBR queues prioritize UBR traffic.
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ILMI and signalling get the higher priority queue, as well as UBR traffic
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that specifies a peak cell rate.
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All other UBR traffic goes into the lower queue.
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.Pp
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The following sysctls are recognized by the driver:
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.Bl -tag -width indent
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.It Va hw.idt.log_bufstat
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Print statistics about buffer use to the system log periodically.
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.It Va hw.idt.log_vcs
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Print information about VC opens, closes, and other events to the system log.
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.It Va hw.idt.bufs_large
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Set or print the maximum size of the 2KB buffer queue.
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.It Va hw.idt.bufs_small
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Set or print the maximum size of the mbuf queue.
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.It Va hw.idt.cur_large
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Print the current size of the 2KB buffer queue.
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.It Va hw.idt.cur_small
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Print the current size of the mbuf queue.
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.It Va hw.idt.qptr_hold
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Optimize the TX queue buffer for lowest overhead.
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.El
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.Sh SEE ALSO
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.Xr natm 4 ,
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.Xr natmip 4 ,
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.Xr ifconfig 8 ,
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.Xr route 8
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.Sh AUTHORS
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.An -nosplit
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.An Richard Hodges ,
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based on the original driver for
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.Fx 2.2
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by
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.An Mark Tinguely .
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.An Bruce M. Simpson
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wrote this manual page and backported the driver to
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.Fx 4.9 .
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