凝思网络故障排查流程

网络故障排查流程

问题描述

网络故障排查流程

适用范围

linx-6.0.60

linx-6.0.80

linx-6.0.100

解决方案

1. 检查系统是否激活，如果是测试序列号请注意是否过期

~# cat /boot/grub/grub.cfg# 序列号存在，说明已经序列号已经写入gurb启动项

~# cat /proc/cmdline# 序列号存在，说明系统已经加载了序列号，已写入内核

~# cat /proc/linxsn_info# 文件存在且有序列号输出，说明序列号生效

2. 核对网络配置文件单词以及语法是否填写正确，并确保ifconfig输出的ip与配置相同

~# ifconfig

Link encap:Ethernet HWaddr 00:0c:29:7f:98:f6eth0

inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:432 errors:0 dropped:0 overruns:0 frame:0

TX packets:205 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:43118 (42.1 KiB) TX bytes:23795 (23.2 KiB)

Link encap:Local Loopbacklo

inet addr:127.0.0.1 Mask:255.0.0.0

UP LOOPBACK RUNNING MTU:16436 Metric:1

RX packets:4 errors:0 dropped:0 overruns:0 frame:0

TX packets:4 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:340 (340.0 B) TX bytes:340 (340.0 B)

3. 检查网口是否正确连接

~# ethtool eth0

Settings for eth0:

Supported ports: [ TP ]

10baseT/Half 10baseT/FullSupported link modes:

100baseT/Half 100baseT/Full

1000baseT/Full

Supported pause frame use: No

Supports auto-negotiation: Yes

10baseT/Half 10baseT/FullAdvertised link modes:

100baseT/Half 100baseT/Full

1000baseT/Full

Advertised pause frame use: No

Advertised auto-negotiation: Yes

Speed: 1000Mb/s

Duplex: Full

Port: Twisted Pair

PHYAD: 0

Transceiver: internal

Auto-negotiation: on

MDI-X: Unknown

Supports Wake-on: umbg

Wake-on: d

0x00000007 (7)Current message level:

drv probe link

Link detected: yes#检测链接状态，yes标明网线连接正常

~# ethtool -p eth0#查看eth0对应机器网口是否出现灯光闪烁，此命令用于确定网线是否插对网口

4. 检查网络连通性(测试相同网段，不同网段之间需要提前添加路由)

~# ping -c 2 10.0.2.6

PING 10.0.2.6 (10.0.2.6) 56(84) bytes of data.

64 bytes from 10.0.2.6: icmp_seq=1 ttl=64 time=0.057 ms

64 bytes from 10.0.2.6: icmp_seq=2 ttl=64 time=0.115 ms

— 10.0.2.6 ping statistics —

2 packets transmitted, 2 received, 0% packet loss, time 1027ms

rtt min/avg/max/mdev = 0.057/0.086/0.115/0.029 ms