patm, idt, ipfw - next adentures

I reinstall os to FreeBSD 4.9-RC and change atm card to Prosum
PROAMT-155.THIS IS NOT WORK. When os start all work good, but after 20-90
seconds some PVCs which have big traffic(8Mbit/s) break transmission and
don't send packets. I did many tests, I had always the same results - the
end of transssmision without any message. Sometimes I get this message:
Oct  2 03:18:45 ordos /kernel: proatm0: i=101, status=00080008
Oct  2 03:18:45 ordos /kernel: proatm0: not enough large buffers.
Oct  2 03:18:45 ordos last message repeated 99 times
Oct  2 03:18:45 ordos /kernel: proatm0: i=101, status=00080008
Oct  2 03:18:45 ordos /kernel: proatm0: not enough large buffers.
Oct  2 03:18:45 ordos last message repeated 69 times
Oct  2 03:18:45 ordos /kernel: All mbuf clusters exhausted, please see
tuning(7).
Oct  2 03:18:45 ordos /kernel: proatm0: not enough large buffers.
Oct  2 03:18:45 ordos last message repeated 29 times
Oct  2 03:18:45 ordos /kernel: proatm0: i=101, status=00080008
Oct  2 03:18:46 ordos /kernel: proatm0: not enough large buffers.
Oct  2 03:18:46 ordos /kernel: proatm0: bad CRC - discarding PDU: 0/144
Oct  2 03:18:46 ordos /kernel: proatm0: not enough large buffers.
Oct  2 03:18:46 ordos last message repeated 98 times
Oct  2 03:18:46 ordos /kernel: proatm0: i=101, status=00080008
but after this message all interface stop send packets (NMBCLUSTERS is set
to 65536 and ipfw is disabled).
Now I must go back to FreeBSD 5.1 and ForeRunner with idt driver - this is
not stable but work.
On this same hardware for about last two years I used Linux-2.4.7 and I did
not have any problems. Why FreeBSD can't this?


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