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IDT(4)		       FreeBSD Kernel Interfaces Manual			IDT(4)

NAME
     idt -- device driver for IDT NICStAR-based	ATM interfaces

SYNOPSIS
     device idt
     device atm

DESCRIPTION
     The idt device driver supports ATM	network	interfaces based on the	IDT
     NICStAR 77211 controller, including the FORE Systems ForeRunner LE25 and
     LE155.  For configuring the card for IP see natmip(4).

     ATM CBR connections are supported,	and bandwidth is allocated in slots of
     64k each.	Three VBR queues handle	traffic	for VBR	and UBR.  Two UBR
     queues prioritize UBR traffic.  ILMI and signalling get the higher	prior-
     ity queue,	as well	as UBR traffic that specifies a	peak cell rate.	 All
     other UBR traffic goes into the lower queue.

     The following sysctls are recognized by the driver:

     hw.idt.log_bufstat
	  Print	statistics about buffer	use to the system log periodically.

     hw.idt.log_vcs
	  Print	information about VC opens, closes, and	other events to	the
	  system log.

     hw.idt.bufs_large
	  Set or print the maximum size	of the 2KB buffer queue.

     hw.idt.bufs_small
	  Set or print the maximum size	of the mbuf queue.

     hw.idt.cur_large
	  Print	the current size of the	2KB buffer queue.

     hw.idt.cur_small
	  Print	the current size of the	mbuf queue.

     hw.idt.qptr_hold
	  Optimize the TX queue	buffer for lowest overhead.

SEE ALSO
     natm(4), natmip(4), ifconfig(8), route(8)

AUTHORS
     Richard Hodges, based on the original driver for FreeBSD 2.2 by
     Mark Tinguely.
     Bruce M. Simpson wrote this manual	page and backported the	driver to
     FreeBSD 4.9.

FreeBSD	9.2			 June 3, 2003			   FreeBSD 9.2

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | AUTHORS

Want to link to this manual page? Use this URL:
<http://www.freebsd.org/cgi/man.cgi?query=idt&sektion=4&manpath=FreeBSD+5.2-RELEASE>

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