RedHat6.5 network card common problems and solutions

RedHat is a widely used Linux system. In the version of RedHat6.5, some network card problems are often encountered during networking. The following small series will help you sort out the common problems and solutions of RedHat6.5 network card. It is helpful to you.

1, can not find the file eth0

In use RedHat6.5, freshly installed system, found no eth0 network card, the first card is the default 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

Solution:

Directly rename the ifcfg-Auto_eth0 file to eth0. After restarting the network card, you will find that the network card name has changed to eth0< Br>

[root@rac01 ~]# service network restart

Bringing up loopback interface: [ OK ]

Bringing up interface eth0: Active connection state: activated

2 Ifconfig finds that the NIC service name has not changed

[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)

Solution:

Each time you change the RedHat NIC information, RedHat will automatically record the MAC address of the NIC and the corresponding NIC service name in /etc/udev/rules.d/70-persistent-net.rules, and modify the corresponding service. Name can be

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

# This file was automatically generated by the /lib/Udev/w Rite_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”

After the modification is complete, you need to restart the system and check the NIC service name has been changed again

[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)
Previous12Next Total 2 Pages