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RedHat6.5网卡常见问题及解决方法

时间:2021-04-09    来源:来了老弟    人气:

RedHat是运用广泛的Linux系统,在RedHat6.5的版本中,在联网的时候经常会遇到一些网卡问题,下面小编给大家整理了RedHat6.5网卡常见的问题及解决方法,希望对你有所帮助。

1、找不到eth0文件

在使用RedHat6.5,新装好的系统,发现没有eth0网卡,默认的第一个网卡是Auto-eth0

[root@rac01 ~]# cat /etc/sysconfig/network-scripts/ifcfg-Auto_eth0

TYPE=Ethernet

BOOTPROTO=none

IPADDR=10.10.10.110

PREFIX=24

GATEWAY=10.10.10.111

DEFROUTE=yes

IPV4_FAILURE_FATAL=yes

IPV6INIT=no

NAME=eth0

UUID=86d44060-4579-48cc-b85b-219a206ca37c

ONBOOT=yes

HWADDR=00:50:56:95:09:76

LAST_CONNECT=1411004329

解决方法:

直接更名ifcfg-Auto_eth0文件为eth0,重启网卡后会发现,网卡名已经变为eth0

[root@rac01 ~]# service network restart

Bringing up loopback interface: [ OK ]

Bringing up interface eth0: Active connection state: activated

2、ifconfig 发现网卡服务名并未更改

[root@rac01 ~]# ifconfig

Auto_eth0 Link encap:Ethernet HWaddr 00:50:56:95:09:76

inet addr:10.10.10.110 Bcast:10.10.10.111 Mask:255.255.255.0

inet6 addr: fe80::250:56ff:fe95:976/64 Scope:Link

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:484 errors:0 dropped:0 overruns:0 frame:0

TX packets:57 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:40095 (39.1 KiB) TX bytes:6271 (6.1 KiB)

解决方法:

每次更改RedHat的网卡信息,RedHat会自动的将网卡的MAC地址和对应的网卡服务名关系记录在/etc/udev/rules.d/70-persistent-net.rules中,修改里面的对应服务名即可

[root@rac01 ~]# vim /etc/udev/rules.d/70-persistent-net.rules

# This file was automatically generated by the /lib/udev/write_net_rules

# program, run by the persistent-net-generator.rules rules file.

#

# You can modify it, as long as you keep each rule on a single

# line, and change only the value of the NAME= key.

# PCI device 0x15ad:0x07b0 (vmxnet3)

SUBSYSTEM==;net;, ACTION==;add;, DRIVERS==;?*;, ATTR{address}==;00:0c:29:1e:f6:ad;, ATTR{type}==;1;, KERNEL==;eth*;, NAME=;eth0;

修改完成后需重启一下系统,再次查看网卡服务名已经更改

[root@rac01 ~]# ifconfig

eth0 Link encap:Ethernet HWaddr 00:50:56:95:09:76

inet addr:10.109.67.81 Bcast:10.109.67.255 Mask:255.255.255.0

inet6 addr: fe80::250:56ff:fe95:976/64 Scope:Link

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:985 errors:0 dropped:0 overruns:0 frame:0

TX packets:61 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:74395 (72.6 KiB) TX bytes:6527 (6.3 KiB)

 

3、网卡eth0被删除后,新加的网卡成了eth1,如何让从eth0开始

[root@rac01 ~]# ifconfig

eth1 Link encap:Ethernet HWaddr 00:50:56:95:09:76

inet addr:10.10.10.110 Bcast:10.10.10.111 Mask:255.255.255.0

inet6 addr: fe80::250:56ff:fe95:976/64 Scope:Link

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:830 errors:0 dropped:0 overruns:0 frame:0

TX packets:57 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:63700 (62.2 KiB) TX bytes:6259 (6.1 KiB)

eth2 Link encap:Ethernet HWaddr 00:0C:29:1E:F6:B7

inet addr:10.10.10.120 Bcast:10.10.10.111Mask:255.255.255.0

inet6 addr: fe80::20c:29ff:fe1e:f6b7/64 Scope:Link

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:777 errors:0 dropped:0 overruns:0 frame:0

TX packets:11 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:54938 (53.6 KiB) TX bytes:746 (746.0 b)

解决方法:

同2问题类似,即可以手动的修改70-persistent-net.rules文件,将对应的MAC地址与网卡序号改成想要的,也可以直接删除该文件,重启系统后,RedHat会自动的创建该文件,并从0开始计数。

删除文件,重启系统

[root@rac01 ~]# mv /etc/udev/rules.d/70-persistent-net.rules /etc/udev/rules.d/7

0-persistent-net.rules.bak

[root@rac01 ~]# reboot

再次查看,会发现已经从eht0开始

[root@rac01 ~]# ifconfig

eth0 Link encap:Ethernet HWaddr 00:50:56:95:09:76

inet addr:10.109.67.81 Bcast:10.109.67.255 Mask:255.255.255.0

inet6 addr: fe80::250:56ff:fe95:976/64 Scope:Link

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:206 errors:0 dropped:0 overruns:0 frame:0

TX packets:68 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:19282 (18.8 KiB) TX bytes:7215 (7.0 KiB)

eth1 Link encap:Ethernet HWaddr 00:0C:29:1E:F6:B7

inet addr:10.109.67.83 Bcast:10.109.67.255 Mask:255.255.255.0

inet6 addr: fe80::20c:29ff:fe1e:f6b7/64 Scope:Link

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:131 errors:0 dropped:0 overruns:0 frame:0

TX packets:11 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:8736 (8.5 KiB) TX bytes:746 (746.0 b)

4、每次重启网卡,总是提示

Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/9

此时网卡也可以正常通信,这个是因为RedHat自己开发的NetworkManager管理工具和/etc/sysconfig/network-scripts/ifcfg-ethx配置不同步造成的。

解决方法:

要消除这个提示,请关闭NetworkManager服务即可:

[root@rac01 ~]# service network restart

Shutting down loopback interface: [ OK ]

Bringing up loopback interface: [ OK ]

Bringing up interface eth0: Active connection state: activated

Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/2 [ OK ]

Bringing up interface eth1: Active connection state: activated

Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/3 [ OK ]

关闭NetworkManager服务

[root@rac01 ~]# service NetworkManager stop

Stopping NetworkManager daemon: [ OK ]

再次重启网卡

[root@rac01 ~]# service network restart

Shutting down loopback interface: [ OK ]

Bringing up loopback interface: [ OK ]

Bringing up interface eth0: [ OK ]

Bringing up interface eth1: [ OK ]

5、重启网卡出现提示:

Bringing up interface eth0: Determining if ip address 10.109.67.81 is already in use for device eth0.。。

[ OK ]

Bringing up interface eth1: Determining if ip address 10.109.67.83 is already in use for device eth1.。。

[ OK ]

该警告一般是由于网卡解析arp协议导致的,可在网卡的配置文件中加入ARPCHECK=NO参数来屏蔽该检查

[root@rac01 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0

TYPE=Ethernet

BOOTPROTO=none

IPADDR=10.109.67.81

PREFIX=24

GATEWAY=10.109.67.254

DEFROUTE=yes

IPV4_FAILURE_FATAL=yes

IPV6INIT=no

NAME=eth0

UUID=86d44060-4579-48cc-b85b-219a206ca37c

ONBOOT=yes

HWADDR=00:50:56:95:09:76

LAST_CONNECT=1411004329

ARPCHECK=no

再次启动网卡,一切正常

[root@rac01 ~]# service network restart

Shutting down interface eth0: [ OK ]

Shutting down interface eth1: [ OK ]

Shutting down loopback interface: [ OK ]

Bringing up loopback interface: [ OK ]

Bringing up interface eth0: [ OK ]

Bringing up interface eth1: [ OK ]

上面就是RedHat6.5网卡常见问题及解决方法的介绍了,如果你在联网的时候出现连接不上的情况,可以看看是不是网卡出现了问题,可用本文介绍的相关方法进行处理。

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