服务器网卡总掉，升级了驱动还是，大虾们帮帮

zzzrrr44__

# dmesg | grep tg3
tg3.c:v3.6RH (June 12, 2004)
tg3.c:v3.6RH (June 12, 2004)
tg3: eth0: Link is up at 1000 Mbps, full duplex.
tg3: eth0: Flow control is off for TX and off for RX.
tg3: tg3_stop_block timed out, ofs=2c00 enable_bit=2
tg3: tg3_stop_block timed out, ofs=1800 enable_bit=2
tg3: tg3_stop_block timed out, ofs=4800 enable_bit=2
tg3: eth0: Link is up at 1000 Mbps, full duplex.
tg3: eth0: Flow control is off for TX and off for RX.
tg3: tg3_stop_block timed out, ofs=1800 enable_bit=2
tg3: tg3_stop_block timed out, ofs=4800 enable_bit=2
tg3: eth0: Link is up at 1000 Mbps, full duplex.
tg3: eth0: Flow control is off for TX and off for RX.
tg3: tg3_stop_block timed out, ofs=2c00 enable_bit=2
tg3: tg3_stop_block timed out, ofs=1800 enable_bit=2
tg3: tg3_stop_block timed out, ofs=4800 enable_bit=2
tg3: eth0: Link is up at 1000 Mbps, full duplex.
tg3: eth0: Flow control is off for TX and off for RX.

网卡信息：
Ethernet controller: Broadcom Corporation NetXtreme BCM5700 Gigabit Ethernet (#2) (rev 20).
IRQ 18.
Master Capable.  Latency=32.  Min Gnt=64.
Non-prefetchable 64 bit memory at 0xfcd00000 [0xfcd0ffff].

系统重装后，网卡总是不定时的掉，从dmesg里面看，ofs会变值，ofs=4800时就掉了
掉了之后ifconfig看不出任何异常，但网卡就像不管用一样，需要down掉之后up才可以
网上有说是驱动bug，可是升级了还是这样（直接用rpm -ivh装的，重启过）
我现在做了个检测程序挂在上面，每分钟ping下不通话就down-up一下，可是有时候居然连续5、6次down-up
作为web服务器这是个很恼人的事情
以前重装时因为系统盘服务未过期，可以在redhat网上升级，没有出现过类似情况

哪位大侠指导下，现在应该怎么办？