DC5 SP4 双网卡绑定 日志报错

服务器本来运行都是没有问题的，今天上午发现连接不上去，重启机器后就可以了，，然后查看日志，发现 eth0和eth2 一直在切换 。。
绑定的网卡（eth0 和 eth2） ，请大侠帮忙判断故障原因，是否有同仁有遇到过这样的问题，是怎么解决的。。。谢谢了！

Feb 24 06:43:17 lsweb2 kernel: NETDEV WATCHDOG: eth2: transmit timed out
Feb 24 06:43:17 lsweb2 kernel: netxen_nic eth2: transmit timeout, resetting.
Feb 24 06:43:17 lsweb2 kernel: bonding: bond0: link status definitely down for interface eth2, disabling it
Feb 24 06:43:17 lsweb2 kernel: bonding: bond0: making interface eth0 the new active one.
Feb 24 06:43:21 lsweb2 kernel: netxen_nic: card response timeout.
Feb 24 06:43:21 lsweb2 kernel: netxen_nic: eth2 NIC Link is up
Feb 24 06:43:21 lsweb2 kernel: bonding: bond0: link status definitely up for interface eth2.
Feb 24 07:11:31 lsweb2 kernel: NETDEV WATCHDOG: eth0: transmit timed out
Feb 24 07:11:31 lsweb2 kernel: netxen_nic eth0: transmit timeout, resetting.
Feb 24 07:11:31 lsweb2 kernel: bonding: bond0: link status definitely down for interface eth0, disabling it
Feb 24 07:11:31 lsweb2 kernel: bonding: bond0: making interface eth2 the new active one.
Feb 24 07:11:35 lsweb2 kernel: netxen_nic: card response timeout.
Feb 24 07:11:35 lsweb2 kernel: netxen_nic: eth0 NIC Link is up
Feb 24 07:11:35 lsweb2 kernel: bonding: bond0: link status definitely up for interface eth0.
Feb 24 07:39:43 lsweb2 kernel: NETDEV WATCHDOG: eth2: transmit timed out
Feb 24 07:39:43 lsweb2 kernel: netxen_nic eth2: transmit timeout, resetting.
Feb 24 07:39:43 lsweb2 kernel: bonding: bond0: link status definitely down for interface eth2, disabling it
Feb 24 07:39:43 lsweb2 kernel: bonding: bond0: making interface eth0 the new active one.
Feb 24 07:39:47 lsweb2 kernel: netxen_nic: card response timeout.
Feb 24 07:39:47 lsweb2 kernel: netxen_nic: eth2 NIC Link is up
Feb 24 07:39:47 lsweb2 kernel: bonding: bond0: link status definitely up for interface eth2.
Feb 24 08:07:55 lsweb2 kernel: NETDEV WATCHDOG: eth0: transmit timed out
Feb 24 08:07:55 lsweb2 kernel: netxen_nic eth0: transmit timeout, resetting.
Feb 24 08:07:55 lsweb2 kernel: bonding: bond0: link status definitely down for interface eth0, disabling it
Feb 24 08:07:55 lsweb2 kernel: bonding: bond0: making interface eth2 the new active one.
Feb 24 08:07:59 lsweb2 kernel: netxen_nic: card response timeout.
Feb 24 08:07:59 lsweb2 kernel: netxen_nic: eth0 NIC Link is up
Feb 24 08:07:59 lsweb2 kernel: bonding: bond0: link status definitely up for interface eth0.
Feb 24 08:36:07 lsweb2 kernel: NETDEV WATCHDOG: eth2: transmit timed out
Feb 24 08:36:07 lsweb2 kernel: netxen_nic eth2: transmit timeout, resetting.
Feb 24 08:36:07 lsweb2 kernel: bonding: bond0: link status definitely down for interface eth2, disabling it
Feb 24 08:36:07 lsweb2 kernel: bonding: bond0: making interface eth0 the new active one.
Feb 24 08:36:11 lsweb2 kernel: netxen_nic: card response timeout.
Feb 24 08:36:11 lsweb2 kernel: netxen_nic: eth2 NIC Link is up
Feb 24 08:36:11 lsweb2 kernel: bonding: bond0: link status definitely up for interface eth2.