Linux Nic name modification note

A small problem occurs in the Test environment, because the virtual machines are often copied to each other, resulting in inconsistent Nic configurations 1. problem description

A small problem occurs in the Test environment because the virtual machines are often copied to each other, resulting in inconsistent Nic configurations.

 

Configuration file information:

[Root @ ora10g network-scripts] # catifcfg-eth0

DEVICE = "eth0"

NM_CONTROLLED = "yes"

ONBOOT = yes

TYPE = Ethernet

BOOTPROTO = none

IPADDR = 192.168.1.12

PREFIX = 24

GATEWAY = 192.168.1.1

DEFROUTE = yes

20174_failure_fatal = no

IPV6INIT = no

NAME = "System eth0"

UUID = 5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03

HWADDR = 08: 00: 27: BD: A6: ED

 

[Root @ ora10g network-scripts] # catifcfg-eth1

DEVICE = "eth1"

NM_CONTROLLED = "yes"

ONBOOT = yes

TYPE = Ethernet

BOOTPROTO = none

IPADDR = 192.168.1.13

PREFIX = 24

GATEWAY = 192.168.1.1

DNS1 = 8.8.8.8

DEFROUTE = yes

20174_failure_fatal = yes

IPV6INIT = no

NAME = "System eth1"

UUID = 9c92fad9-6ecb-3e6c-eb4d-8a47c6f50c04

HWADDR = 08: 00: 27: 6E: 86: 10

 

The network adapter names are eth0 and eth1.

 

However, if we use the ifconfig command to view:

[Root @ ora10g network-scripts] # ifconfig-

Eth2 Link encap: Ethernet HWaddr08: 00: 27: BD: A6: ED

Inet addr: 192.168.1.12 Bcast: 192.168.1.255 Mask: 255.255.255.0

Inet6 addr: fe80: a00: 27ff: febd: a6ed/64 Scope: Link

Up broadcast running multicast mtu: 1500 Metric: 1

RX packets: 187 errors: 0 dropped: 0 overruns: 0 frame: 0

TX packets: 59 errors: 0 dropped: 0 overruns: 0 carrier: 0

Collisions: 0 fig: 1000

RX bytes: 16356 (15.9 KiB) TXbytes: 6116 (5.9 KiB)

 

Eth3 Link encap: Ethernet HWaddr08: 00: 27: 6E: 86: 10

Inet addr: 192.168.1.13 Bcast: 192.168.1.255 Mask: 255.255.255.0

Inet6 addr: fe80: a00: 27ff: fe6e: 8610/64 Scope: Link

Up broadcast running multicast mtu: 1500 Metric: 1

RX packets: 1357 errors: 0 dropped: 0 overruns: 0 frame: 0

TX packets: 1099 errors: 0 dropped: 0 overruns: 0 carrier: 0

Collisions: 0 fig: 1000

RX bytes: 120604 (117.7 KiB) TXbytes: 115937 (113.2 KiB)

 

Lo Link encap: Local Loopback

Inet addr: 127.0.0.1 Mask: 255.0.0.0

Inet6 addr: 1/128 Scope: Host

Up loopback running mtu: 16436 Metric: 1

RX packets: 8 errors: 0 dropped: 0 overruns: 0 frame: 0

TX packets: 8 errors: 0 dropped: 0 overruns: 0 carrier: 0

Collisions: 0 txqueuelen: 0

RX bytes: 480 (480.0 B) TXbytes: 480 (480.0 B)

 

The NIC names here are eth2 and eth3.

 

 

II. Solution

 

 

Modify the ing relationships in the/etc/udev/rules. d/70-persistent-net.rules file.

 

-- Before modification:

[Root @ ora10g network-scripts] # cat/etc/udev/rules. d/70-persistent-net.rules

# This file was automatically generated bythe/lib/udev/write_net_rules

# Program, run by thepersistent-net-generator.rules rules file.

#

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

# Line, and change only the value of theNAME = key.

 

# PCI device 0x8086: 0x100e (e1000)

SUBSYSTEM = "net", ACTION = "add", DRIVERS = "? * ", ATTR {address} =" 08: 00: 27: d4: AB: 67 ", ATTR {type} =" 1 ", KERNEL = "eth *", NAME = "eth1"

 

# PCI device 0x8086: 0x100e (e1000)

SUBSYSTEM = "net", ACTION = "add", DRIVERS = "? * ", ATTR {address} =" 08: 00: 27: af: 2b: 37 ", ATTR {type} =" 1 ", KERNEL = "eth *", NAME = "eth0"

 

# PCI device 0x8086: 0x100e (e1000)

SUBSYSTEM = "net", ACTION = "add", DRIVERS = "? * ", ATTR {address} =" 08: 00: 27: bd: a6: ed ", ATTR {dev_id} =" 0x0 ", ATTR {type} = "1", KERNEL = "eth *", NAME = "eth2"

 

# PCI device 0x8086: 0x100e (e1000)

SUBSYSTEM = "net", ACTION = "add", DRIVERS = "? * ", ATTR {address} =" 08: 00: 27: 6e: 86: 10 ", ATTR {dev_id} =" 0x0 ", ATTR {type} = "1", KERNEL = "eth *", NAME = "eth3"

 

 

 

-- After modification:

 

[Root @ ora10g network-scripts] # cat/etc/udev/rules. d/70-persistent-net.rules

# This file was automatically generated bythe/lib/udev/write_net_rules

# Program, run by thepersistent-net-generator.rules rules file.

#

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

# Line, and change only the value of theNAME = key.

 

# PCI device 0x8086: 0x100e (e1000)

SUBSYSTEM = "net", ACTION = "add", DRIVERS = "? * ", ATTR {address} =" 08: 00: 27: 6E: 86: 10 ", ATTR {type} =" 1 ", KERNEL = "eth *", NAME = "eth1"

 

# PCI device 0x8086: 0x100e (e1000)

SUBSYSTEM = "net", ACTION = "add", DRIVERS = "? * ", ATTR {address} =" 08: 00: 27: BD: A6: ED ", ATTR {type} =" 1 ", KERNEL = "eth *", NAME = "eth0"

 

Note that the MAC address here should be consistent with the ifcfg-eth0.

 

 

Restart the NIC and udev:

-- Ifdown Nic:

Ifdown eth0

Ifdown eth1

 

-- Restart udev

/Etc/init. d/udev-post stop;

/Etc/init. d/udev-post start

Or use:

Service udev-post stop
Service udev-post start

 

Note: For Oracle linux, it is udev-post, and redhat is udev.

 

-- Ifup:

Ifup eth0

Ifup eth1

 

 

However, in my test, none of these two items worked. I restarted the entire OS to take effect. Small knowledge.