3、A rule in /lib/udev/rules.d/75-net-description.rules instructs udev to fill in the internal udev device property values ID_NET_NAME_ONBOARD, ID_NET_NAME_SLOT, ID_NET_NAME_PATH, ID_NET_NAME_MAC by examining the network interface device. Note, that some device properties might be undefined.

[root@station66 ~]# cat /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 0x8086:0x100f (e1000)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:36:87:62", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

[root@station71 ~]# cat /etc/udev/rules.d/70-persistent-ipoib.rules 

# This is a sample udev rules file that demonstrates how to get udev to

# set the name of IPoIB interfaces to whatever you wish.  There is a

# 16 character limit on network device names though, so don't go too nuts

#

# Important items to note: ATTR{type}=="32" is IPoIB interfaces, and the

# ATTR{address} match must start with ?* and only reference the last 8

# bytes of the address or else the address might not match on any given

# start of the IPoIB stack

#

# Note: as of rhel7, udev is case sensitive on the address field match

# and all addresses need to be in lower case.

#

# ACTION=="add", SUBSYSTEM=="net", DRIVERS=="?*", ATTR{type}=="32", ATTR{address}=="?*00:02:c9:03:00:31:78:f2", NAME="mlx4_ib3

我们来具体操作一把:

[root@station71 network-scripts]# cat /etc/sysconfig/network-scripts/ifcfg-eth0  #这块叫啥没有关系的哈！

TYPE=Ethernet

HWADDR=00:0c:29:95:b5:21

BOOTPROTO=none

NAME=eth0

DEVICE=eth0

ONBOOT=yes

IPADDR=192.168.99.71

PREFIX=24

GATEWAY=192.168.99.1

DNS1=202.106.46.151

[root@station71 ~]#vim  /etc/default/grub  +6  #给内核传递参数关闭biosdevname功能关闭ipv6.

GRUB_CMDLINE_LINUX="net.ifnames=0 ipv6.disable=1 rd.lvm.lv=rootvg/root rd.lvm.lv=rootvg/swap rhgb quiet"

[root@station71 ~]# grub2-mkconfig    /boot/grub2/grub.cfg 

现在重启看到我们的网卡应该是eth0了、如果改个网卡的名字都需要重启，那还搞毛线，事实上是uptime在几千的很常见。

[root@station71 network-scripts]# ifconfig  eno16777736   down 

[root@station71 network-scripts]# ethtool -i  eno16777736    #网卡的驱动名字

driver: e1000

[root@station71 network-scripts]# modinfo  e1000             #网卡的驱动程序所在的模块

filename:       /lib/modules/3.10.0-327.el7.x86_64/kernel/drivers/net/ethernet/intel/e1000/e1000.ko

[root@station71 network-scripts]# modprobe  -r  e1000        #卸载网卡驱动模块

[root@station71 network-scripts]# lsmod    |grep   e1000     #查看一下

[root@station71 network-scripts]# modprobe   e1000           #重新加载网卡驱动

[root@station71 ~]# nmcli  device 

DEVICE       TYPE      STATE         CONNECTION 

virbr0       bridge    connected     virbr0     

eno50332208  ethernet  connected     eth3       

eno16777736  ethernet  disconnected  --         

eno33554984  ethernet  disconnected  --         

lo           loopback  unmanaged     --         

virbr0-nic   tap       unmanaged     --         

[root@station71 ~]# nmcli connection add type ethernet ifname eno16777736  con-name eth0

Connection 'eth0' (3d0ea27f-aee7-4598-9c23-679fde3de18f) successfully added.

[root@station71 ~]# nmcli connection add type ethernet ifname eno16777736  con-name eth0.home

Connection 'eth0.home' (54ef6f15-7981-4f0d-9958-15d6adabb05c) successfully added.

[root@station71 ~]# nmcli connection add type ethernet ifname eno16777736  con-name eth0.work

Connection 'eth0.work' (07d80f13-d36d-43f0-9b07-0648dd91e164) successfully added.

[root@station71 ~]# nmcli connection modify eth0 ipv4.method manual ipv4.addresses 192.168.100.71/24 ipv4.gateway 192.168.100.1 ipv4.dns 202.106.46.151

[root@station71 ~]# nmcli connection modify eth0.home ipv4.method auto ipv4.dns 202.106.46.151

[root@station71 ~]# nmcli connection modify eth0.work ipv4.method auto ipv4.dns 202.106.195.68

[root@station71 ~]# nmcli connection add type ethernet ifname eno33554984  con-name eth2

Connection 'eth2' (8a97025f-4581-410f-80bd-31b5759970de) successfully added.

[root@station71 ~]# nmcli connection modify eth2 ipv4.method manual ipv4.addresses 192.168.99.71/24 ipv4.gateway 192.168.99.1 

[root@station71 ~]# nmcli connection up eth0 ; nmcli  connection  up eth2

Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/31)

Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/32)

[root@station71 ~]# nmcli device 

DEVICE       TYPE      STATE      CONNECTION 

virbr0       bridge    connected  virbr0     

eno16777736  ethernet  connected  eth0       

eno33554984  ethernet  connected  eth2       

eno50332208  ethernet  connected  eth3       

lo           loopback  unmanaged  --         

virbr0-nic   tap       unmanaged  --         

[root@station71 ~]# nmcli connection show

NAME       UUID                                  TYPE            DEVICE      

virbr0     0d0064a4-b64e-44de-82c7-5f4eb991f1bd  bridge          virbr0      

eth2       8a97025f-4581-410f-80bd-31b5759970de  802-3-ethernet  eno33554984 

eth0.work  07d80f13-d36d-43f0-9b07-0648dd91e164  802-3-ethernet  --          

eth0.home  54ef6f15-7981-4f0d-9958-15d6adabb05c  802-3-ethernet  --          

eth0       3d0ea27f-aee7-4598-9c23-679fde3de18f  802-3-ethernet  eno16777736 

eth3       919158d0-ecfc-468a-aa99-85891161a972  802-3-ethernet  eno50332208 

[root@station71 ~]# nmcli connection show  --active

NAME    UUID                                  TYPE            DEVICE      

virbr0  0d0064a4-b64e-44de-82c7-5f4eb991f1bd  bridge          virbr0      

eth2    8a97025f-4581-410f-80bd-31b5759970de  802-3-ethernet  eno33554984 

eth0    3d0ea27f-aee7-4598-9c23-679fde3de18f  802-3-ethernet  eno16777736 

eth3    919158d0-ecfc-468a-aa99-85891161a972  802-3-ethernet  eno50332208 

[root@station71 ~]# ping  www.baidu.com

PING www.a.shifen.com (61.135.169.125) 56(84) bytes of data.

64 bytes from 61.135.169.125: icmp_seq=1 ttl=57 time=6.31 ms

^C

--- www.a.shifen.com ping statistics ---