re(4) watchdog timeouts after a short time

[Joe Talbott]

I upgraded my 2.1-DEVELOPMENT box from 2.1-DEVELOPMENT from several
months ago and my re(4) a RTL8101E card only works for a few seconds
after boot.  After which I get watchdog timeouts and am unable to ping
a remote host.  I was unable to get any information from tcpdump.
Here is the relevant verbose dmesg output and sysctl output.  I have
tried disabling rx/tx csum and vlan{mtu,hwtagging} all to no avail.  Let
me know what further info is needed.

re0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        options=1b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING>
        inet6 fe80::2a0:d1ff:fe60:25a3%re0 prefixlen 64 scopeid 0x1 
        inet x.x.x.x netmask 0xffffffc0 broadcast x.x.x.x
        ether 00:a0:d1:60:25:a3
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active


Joe
pcib1: device re0 requested decoded I/O range 0x2000-0x20ff
re0.pci2.pcib1.pci0.pcib0.legacypci0.nexus0.root0
re0: <RealTek 810x PCIe 10/100baseTX> [tentative] port 0x2000-0x20ff mem 0xd0000000-0xd0000fff irq 2 at device 0.0 on pci2
pcib1: device re0 requested decoded I/O range 0x2000-0x20ff
re0: Hardware rev. 0x34000000; MAC ver. 0x11; PCI-E 125MHz
miibus0.re0.pci2.pcib1.pci0.pcib0.legacypci0.nexus0.root0
miibus0: <MII bus> [tentative] on re0
rlphy0.miibus0.re0.pci2.pcib1.pci0.pcib0.legacypci0.nexus0.root0
miibus0: <MII bus> [attached!] on re0
re0: bpf attached
re0: MAC address: 00:a0:d1:60:25:a3
re0: <RealTek 810x PCIe 10/100baseTX> [attached!] port 0x2000-0x20ff mem 0xd0000000-0xd0000fff irq 2 at device 0.0 on pci2
re0: adjust device control 0x2810 -> 0x5810
hw.re0.rx_desc_count: 256
hw.re0.tx_desc_count: 256
hw.re0.sim_time: 75
hw.re0.imtype: 1