求助:eth0: (180616) System Error occurred (0)

一台老机器,带独立网卡,只安装了一个redhat 9,系统刚安装时网络是好的,可以ping通网关,可以上网。在机子上做了一些简单的修改后(设置固定ip地址,开启tftp服务等操作),结果不能上网了。
->ping 192.168.10.1出现:connect: Network is unreachable
->dmesg | tail出现:
eth0: (180616) System Error occurred (0)
eth0: (180617) System Error occurred (0)
eth0: (180618) System Error occurred (0)
eth0: (180619) System Error occurred (0)
eth0: (180620) System Error occurred (0)
eth0: (180621) System Error occurred (0)
eth0: (180622) System Error occurred (0)
eth0: (180623) System Error occurred (0)
eth0: (180624) System Error occurred (0)
eth0: (180625) System Error occurred (0)
请高手帮忙分析一下,这是什么原因造成的,该怎么修复?