[Red Hat] tg3_stop_block time out

Bonjour à tous,

Sous Linux RH 9, avec un DELL PowerEdge 1750, je rencontre de temps à autre des coupures de réseaux me générant les erreurs Kernel suivantes :
Jul 19 14:56:59 aragorn kernel: NETDEV WATCHDOG: eth0: transmit timed out
Jul 19 14:56:59 aragorn kernel: tg3: eth0: transmit timed out, resetting
Jul 19 14:56:59 aragorn kernel: tg3: tg3_stop_block timed out, ofs=3400 enable_bit=2
Jul 19 14:56:59 aragorn kernel: tg3: tg3_stop_block timed out, ofs=2400 enable_bit=2
Jul 19 14:56:59 aragorn kernel: tg3: tg3_stop_block timed out, ofs=1400 enable_bit=2
Jul 19 14:56:59 aragorn kernel: tg3: tg3_stop_block timed out, ofs=c00 enable_bit=2
Jul 19 14:56:59 aragorn kernel: tg3: tg3_stop_block timed out, ofs=4800 enable_bit=2