realtek 811C-GR freeze with latest 8.0

Hello,

We use a couple of Supermicro X7SLN-F mainboards (w/ 2x Realtek 
RTL8111C-GR) and experienced frequent freezes of the NICs in use. With 
Debian, a driver update solved the problem. With FreeBSD, we first tried 
ifconfig -rxcsum -txcsum as a workaround, later compiled a kernel with 
the latest driver. The problems persist.

Is there anything we can do to support nailing down the cause and 
finding a solution? In the meantime, is there any known workaround 
besides resetting the interface daily?

TIA,
vt


dnstest# uname -a
FreeBSD dnstest.continum.net 8.0-STABLE FreeBSD 8.0-STABLE #0: Tue Jan 
26 14:08:00 CET 2010 
root_at_dnstest.continum.net:/usr/obj/usr/src/sys/RELENG8  amd64

dnstest# grep 'Exp ' /usr/src/sys/dev/re/if_re.c
__FBSDID("$FreeBSD: src/sys/dev/re/if_re.c,v 1.160.2.5 2009/12/03 
18:48:32 yongari Exp $");

Jan 26 13:29:54 dnstest kernel: re0: <RealTek 
8168/8168B/8168C/8168CP/8168D/8168DP/8111B/8111C/8111CP/8111DP PCIe 
Gigabit Ethernet> port 0xc800-0xc8ff mem 
0xfdeff000-0xfdefffff,0xfcef0000-0xfcefffff irq 16 at device 0.0 on pci2
Jan 26 13:29:54 dnstest kernel: re1: <RealTek 
8168/8168B/8168C/8168CP/8168D/8168DP/8111B/8111C/8111CP/8111DP PCIe 
Gigabit Ethernet> port 0xd800-0xd8ff mem 
0xfdfff000-0xfdffffff,0xfcff0000-0xfcffffff irq 17 at device 0.0 on pci3
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