IDT(4) BSD 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 ALSOnatm(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.
BSD June 3, 2003 BSD