Linux：添加网卡硬件后「ifconfig」不显示

Nephilim 2024-08-28

178

Tips：一些记录，一些笔记

2024/08/27

TUESDAY

Do things to exacting, breaks things break.

做事过于苛求，反而把事情弄坏。

硬件上添加网卡

这里，我是通过虚拟机（VMware）模拟硬件环境上的「新增网卡」的动作的：

可以看到，当前虚拟机上，其实是有「5块」网卡的。

Linux查看网卡配置

通常查看Linux系统的网卡情况，我们会使用命令「ifconfig」

[root@node1 ~]# ifconfig
ens192: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.2.18  netmask 255.255.255.0  broadcast 192.168.2.255
        inet6 fe80::250:56ff:feac:f04b  prefixlen 64  scopeid 0x20<link>
        ether 00:50:56:ac:f0:4b  txqueuelen 1000  (Ethernet)
        RX packets 4451  bytes 9948659 (9.4 MiB)
        RX errors 0  dropped 12  overruns 0  frame 0
        TX packets 4599  bytes 401053 (391.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:56:c4:52  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


[root@node1 ~]# 
[root@node1 ~]# ifconfig | grep flags
ens192: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
[root@node1 ~]#

可以从以上的命令反馈中看到，「ifconfig」并没有识别到新增的四块网卡。

至此，本文题目所示的问题产生了。

网卡是否被添加到了系统

首先看，网卡是否被正确的添加到了系统中：

[root@node1 ~]# lspci | grep "VMware VMXNET3"
04:00.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01)
0b:00.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01)
0c:00.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01)
13:00.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01)
1b:00.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01)
[root@node1 ~]#

这里，由于我们使用的是VMware模拟的硬件设备，因此过滤条件是「VMware VMXNET3」

从上面的命令反馈可以看到，网卡其实是被成功添加到了系统中的，只不过与「ifconfig」的输出结果还有一些出入。

因此，这个问题并不是很大。

问题的解决

在Linux中，管理网络设备的服务是「NetworkManager」，而它对应的命令工具是「nmcli」

解决该问题，就需要用到它们。

具体如下：

[root@node1 ~]# nmcli device status
Error: NetworkManager is not running.
[root@node1 ~]# 
[root@node1 ~]# service NetworkManager status
Redirecting to bin/systemctl status NetworkManager.service
● NetworkManager.service - Network Manager
   Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:NetworkManager(8)
[root@node1 ~]# 
[root@node1 ~]# service NetworkManager start
Redirecting to bin/systemctl start NetworkManager.service
[root@node1 ~]# 
[root@node1 ~]# service NetworkManager status
Redirecting to bin/systemctl status NetworkManager.service
● NetworkManager.service - Network Manager
   Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; disabled; vendor preset: enabled)
   Active: active (running) since Tue 2024-08-27 22:16:33 CST; 2s ago
     Docs: man:NetworkManager(8)
 Main PID: 3583 (NetworkManager)
    Tasks: 8
   CGroup: /system.slice/NetworkManager.service
           ├─3583 /usr/sbin/NetworkManager --no-daemon
           ├─3593 /sbin/dhclient -d -q -sf usr/libexec/nm-dhcp-helper -pf var/run/dhclient-ens161.pid -lf ...
           ├─3597 /sbin/dhclient -d -q -sf usr/libexec/nm-dhcp-helper -pf var/run/dhclient-ens193.pid -lf ...
           ├─3598 /sbin/dhclient -d -q -sf usr/libexec/nm-dhcp-helper -pf var/run/dhclient-ens224.pid -lf ...
           └─3599 /sbin/dhclient -d -q -sf usr/libexec/nm-dhcp-helper -pf var/run/dhclient-ens256.pid -lf ...


Aug 27 22:16:34 node1 NetworkManager[3583]: <info>  [1724768194.6035] dhcp4 (ens256):   lease time 86400
Aug 27 22:16:34 node1 NetworkManager[3583]: <info>  [1724768194.6035] dhcp4 (ens256):   nameserver '192.168.2.1'
Aug 27 22:16:34 node1 NetworkManager[3583]: <info>  [1724768194.6035] dhcp4 (ens256):   domain name 'ctc'
Aug 27 22:16:34 node1 NetworkManager[3583]: <info>  [1724768194.6035] dhcp4 (ens256): state changed unkno...ound
Aug 27 22:16:34 node1 NetworkManager[3583]: <info>  [1724768194.6044] device (ens256): state change: ip-c...ed')
Aug 27 22:16:34 node1 NetworkManager[3583]: <info>  [1724768194.6049] device (ens256): state change: ip-c...ed')
Aug 27 22:16:34 node1 NetworkManager[3583]: <info>  [1724768194.6051] device (ens256): state change: seco...ed')
Aug 27 22:16:34 node1 dhclient[3599]: bound to 192.168.2.44 -- renewal in 38252 seconds.
Aug 27 22:16:34 node1 NetworkManager[3583]: <info>  [1724768194.6184] device (ens256): Activation: succes...ted.
Aug 27 22:16:34 node1 NetworkManager[3583]: <info>  [1724768194.6188] manager: startup complete
Hint: Some lines were ellipsized, use -l to show in full.
[root@node1 ~]# 
[root@node1 ~]# nmcli device status
DEVICE      TYPE      STATE      CONNECTION         
ens192      ethernet  connected  ens192             
ens161      ethernet  connected  Wired connection 1 
ens193      ethernet  connected  Wired connection 2 
ens224      ethernet  connected  Wired connection 3 
ens256      ethernet  connected  Wired connection 4 
virbr0      bridge    connected  virbr0             
lo          loopback  unmanaged  --                 
virbr0-nic  tun       unmanaged  --                 
[root@node1 ~]#

可以看到，当我们启动了「NetworkManager」服务后，通过「nmcli device status」就可以看到新增的四块网卡了。

这个时候，通过「ifconfig」命令，已经可以看到它们了：

[root@node1 ~]# ifconfig | grep flags
ens161: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
ens192: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
ens193: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
ens224: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
ens256: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
[root@node1 ~]# 
[root@node1 ~]# ifconfig
ens161: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.2.43  netmask 255.255.255.0  broadcast 192.168.2.255
        inet6 fe80::a2a0:fdd1:e875:8915  prefixlen 64  scopeid 0x20<link>
        ether 00:50:56:ac:5e:6d  txqueuelen 1000  (Ethernet)
        RX packets 248  bytes 17572 (17.1 KiB)
        RX errors 0  dropped 9  overruns 0  frame 0
        TX packets 16  bytes 1840 (1.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


ens192: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.2.18  netmask 255.255.255.0  broadcast 192.168.2.255
        inet6 fe80::250:56ff:feac:f04b  prefixlen 64  scopeid 0x20<link>
        ether 00:50:56:ac:f0:4b  txqueuelen 1000  (Ethernet)
        RX packets 6851  bytes 10765281 (10.2 MiB)
        RX errors 0  dropped 60  overruns 0  frame 0
        TX packets 6599  bytes 601149 (587.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


ens193: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.2.41  netmask 255.255.255.0  broadcast 192.168.2.255
        inet6 fe80::8d1f:15ef:daf8:5a79  prefixlen 64  scopeid 0x20<link>
        ether 00:50:56:ac:df:17  txqueuelen 1000  (Ethernet)
        RX packets 245  bytes 17392 (16.9 KiB)
        RX errors 0  dropped 6  overruns 0  frame 0
        TX packets 16  bytes 1840 (1.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


ens224: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.2.42  netmask 255.255.255.0  broadcast 192.168.2.255
        inet6 fe80::4607:858d:ce0e:ad4e  prefixlen 64  scopeid 0x20<link>
        ether 00:50:56:ac:e2:11  txqueuelen 1000  (Ethernet)
        RX packets 242  bytes 17212 (16.8 KiB)
        RX errors 0  dropped 3  overruns 0  frame 0
        TX packets 16  bytes 1840 (1.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


ens256: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.2.44  netmask 255.255.255.0  broadcast 192.168.2.255
        inet6 fe80::ce4:ddcc:551b:ef8c  prefixlen 64  scopeid 0x20<link>
        ether 00:50:56:ac:97:97  txqueuelen 1000  (Ethernet)
        RX packets 239  bytes 17032 (16.6 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 16  bytes 1840 (1.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:56:c4:52  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


[root@node1 ~]# 
[root@node1 ~]# ls -ltr etc/sysconfig/network-scripts/ | grep "ifcfg-"
-rw-r--r--. 1 root root   254 May 22  2020 ifcfg-lo
-rw-r--r--. 1 root root   403 Aug 26 11:06 ifcfg-ens192
[root@node1 ~]#

但由于没有创建对应的「ifcfg-*」的文件，因此它们的IP地址都是通过DHCP服务自动分配的。

要进一步配置网卡，需要两个信息：

通过命令「ifconfig」或者「ip addr」找到对应网卡的MAC地址
通过命令「nmcli」找到对应网卡的UUID

通过「nmcli con show」找到对应网卡的UUID信息：

[root@node1 ~]# nmcli con show
NAME                UUID                                  TYPE      DEVICE 
ens192              0ddc9241-52c2-48b4-8950-eb834bd700b1  ethernet  ens192 
Wired connection 1  4ad688c0-0ce4-36c0-9d16-b859d375f305  ethernet  ens161 
Wired connection 2  dd93dcf1-c2d5-3261-aca4-2fead193ffd9  ethernet  ens193 
Wired connection 3  5c7bec94-dcb2-382d-bf18-ccbcafd96ccc  ethernet  ens224 
Wired connection 4  38d4a993-3fe1-38e3-9d7f-bcb3b711f91e  ethernet  ens256 
virbr0              dd0ddff4-8376-4dc2-ad70-8d648cb136f2  bridge    virbr0 
[root@node1 ~]#

通过「ip addr」找到对应网卡的MAC地址「link/ether」：

[root@node1 ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens161: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:50:56:ac:5e:6d brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.43/24 brd 192.168.2.255 scope global noprefixroute dynamic ens161
       valid_lft 85857sec preferred_lft 85857sec
    inet6 fe80::a2a0:fdd1:e875:8915/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:50:56:ac:f0:4b brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.18/24 brd 192.168.2.255 scope global ens192
       valid_lft forever preferred_lft forever
    inet6 fe80::250:56ff:feac:f04b/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
4: ens193: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:50:56:ac:df:17 brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.41/24 brd 192.168.2.255 scope global noprefixroute dynamic ens193
       valid_lft 85857sec preferred_lft 85857sec
    inet6 fe80::8d1f:15ef:daf8:5a79/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
5: ens224: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:50:56:ac:e2:11 brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.42/24 brd 192.168.2.255 scope global noprefixroute dynamic ens224
       valid_lft 85857sec preferred_lft 85857sec
    inet6 fe80::4607:858d:ce0e:ad4e/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
6: ens256: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:50:56:ac:97:97 brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.44/24 brd 192.168.2.255 scope global noprefixroute dynamic ens256
       valid_lft 85857sec preferred_lft 85857sec
    inet6 fe80::ce4:ddcc:551b:ef8c/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
7: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:56:c4:52 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
8: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:56:c4:52 brd ff:ff:ff:ff:ff:ff
[root@node1 ~]#

开始编辑网卡配置文件，这里只演示其中一个的做法，其他的都是一样的方法。

自定义网卡配置

进入网卡的配置文件存放的目录「/etc/sysconfig/network-scripts」

[root@node1 network-scripts]# pwd
/etc/sysconfig/network-scripts
[root@node1 network-scripts]# 
[root@node1 network-scripts]# ls -ltr | grep ifcfg
-rw-r--r--. 1 root root   254 May 22  2020 ifcfg-lo
-rw-r--r--. 1 root root   403 Aug 26 11:06 ifcfg-ens192
[root@node1 network-scripts]# 
[root@node1 network-scripts]# nmcli con show
NAME                UUID                                  TYPE      DEVICE 
ens192              0ddc9241-52c2-48b4-8950-eb834bd700b1  ethernet  ens192 
Wired connection 1  4ad688c0-0ce4-36c0-9d16-b859d375f305  ethernet  ens161 
Wired connection 2  dd93dcf1-c2d5-3261-aca4-2fead193ffd9  ethernet  ens193 
Wired connection 3  5c7bec94-dcb2-382d-bf18-ccbcafd96ccc  ethernet  ens224 
Wired connection 4  38d4a993-3fe1-38e3-9d7f-bcb3b711f91e  ethernet  ens256 
virbr0              dd0ddff4-8376-4dc2-ad70-8d648cb136f2  bridge    virbr0 
[root@node1 network-scripts]# 
[root@node1 network-scripts]# ifconfig ens161
ens161: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.2.43  netmask 255.255.255.0  broadcast 192.168.2.255
        inet6 fe80::a2a0:fdd1:e875:8915  prefixlen 64  scopeid 0x20<link>
        ether 00:50:56:ac:5e:6d  txqueuelen 1000  (Ethernet)
        RX packets 1387  bytes 94854 (92.6 KiB)
        RX errors 0  dropped 9  overruns 0  frame 0
        TX packets 16  bytes 1840 (1.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


[root@node1 network-scripts]#

开始配置：

[root@node1 network-scripts]# cp ifcfg-ens192 ifcfg-ens161
[root@node1 network-scripts]# 
[root@node1 network-scripts]# vi ifcfg-ens161
[root@node1 network-scripts]# cat ifcfg-ens161 
TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="static"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="ens161"
UUID="4ad688c0-0ce4-36c0-9d16-b859d375f305"
HWADDR="00:50:56:ac:5e:6d"
DEVICE="ens161"
ONBOOT="yes"
IPADDR="192.168.3.18"
PREFIX="24"
GATEWAY="192.168.3.192"
IPV6_PRIVACY="no"
DNS1="8.8.8.8"
[root@node1 network-scripts]#

最后，重启网卡即可：

[root@node1 network-scripts]# ifconfig ens161
ens161: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.2.43  netmask 255.255.255.0  broadcast 192.168.2.255
        inet6 fe80::a2a0:fdd1:e875:8915  prefixlen 64  scopeid 0x20<link>
        ether 00:50:56:ac:5e:6d  txqueuelen 1000  (Ethernet)
        RX packets 5599  bytes 377585 (368.7 KiB)
        RX errors 0  dropped 9  overruns 0  frame 0
        TX packets 16  bytes 1840 (1.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


[root@node1 network-scripts]# 
[root@node1 network-scripts]# ifdown ens161
[root@node1 network-scripts]# ifup ens161
[root@node1 network-scripts]# 
[root@node1 network-scripts]# ifconfig ens161
ens161: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.3.18  netmask 255.255.255.0  broadcast 192.168.3.255
        inet6 fe80::250:56ff:feac:5e6d  prefixlen 64  scopeid 0x20<link>
        ether 00:50:56:ac:5e:6d  txqueuelen 1000  (Ethernet)
        RX packets 53  bytes 3180 (3.1 KiB)
        RX errors 0  dropped 9  overruns 0  frame 0
        TX packets 11  bytes 738 (738.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


[root@node1 network-scripts]#

也可以通过重启网络服务重启：

[root@node1 network-scripts]# /etc/init.d/network restart
Restarting network (via systemctl):  [  OK  ]
[root@node1 network-scripts]#

查看新增的网卡信息：

[root@node1 network-scripts]# nmcli con show
NAME                UUID                                  TYPE      DEVICE 
Wired connection 2  dd93dcf1-c2d5-3261-aca4-2fead193ffd9  ethernet  ens193 
ens161              4ad688c0-0ce4-36c0-9d16-b859d375f305  ethernet  ens161 
ens192              0ddc9241-52c2-48b4-8950-eb834bd700b1  ethernet  ens192 
Wired connection 3  5c7bec94-dcb2-382d-bf18-ccbcafd96ccc  ethernet  ens224 
Wired connection 4  38d4a993-3fe1-38e3-9d7f-bcb3b711f91e  ethernet  ens256 
virbr0              dd0ddff4-8376-4dc2-ad70-8d648cb136f2  bridge    virbr0 
[root@node1 network-scripts]# 
[root@node1 network-scripts]# nmcli con show | grep ens161
ens161              4ad688c0-0ce4-36c0-9d16-b859d375f305  ethernet  ens161 
[root@node1 network-scripts]# 
[root@node1 network-scripts]# ifconfig ens161
ens161: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.3.18  netmask 255.255.255.0  broadcast 192.168.3.255
        inet6 fe80::a2a0:fdd1:e875:8915  prefixlen 64  scopeid 0x20<link>
        ether 00:50:56:ac:5e:6d  txqueuelen 1000  (Ethernet)
        RX packets 80  bytes 4940 (4.8 KiB)
        RX errors 0  dropped 9  overruns 0  frame 0
        TX packets 17  bytes 1322 (1.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


[root@node1 network-scripts]# 
[root@node1 network-scripts]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens161: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:50:56:ac:5e:6d brd ff:ff:ff:ff:ff:ff
    inet 192.168.3.18/24 brd 192.168.3.255 scope global noprefixroute ens161
       valid_lft forever preferred_lft forever
    inet6 fe80::a2a0:fdd1:e875:8915/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:50:56:ac:f0:4b brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.18/24 brd 192.168.2.255 scope global noprefixroute ens192
       valid_lft forever preferred_lft forever
    inet6 fe80::174a:d540:31b0:9f85/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
4: ens193: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:50:56:ac:df:17 brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.41/24 brd 192.168.2.255 scope global noprefixroute dynamic ens193
       valid_lft 77507sec preferred_lft 77507sec
    inet6 fe80::8d1f:15ef:daf8:5a79/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
5: ens224: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:50:56:ac:e2:11 brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.42/24 brd 192.168.2.255 scope global noprefixroute dynamic ens224
       valid_lft 77507sec preferred_lft 77507sec
    inet6 fe80::4607:858d:ce0e:ad4e/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
6: ens256: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:50:56:ac:97:97 brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.44/24 brd 192.168.2.255 scope global noprefixroute dynamic ens256
       valid_lft 77507sec preferred_lft 77507sec
    inet6 fe80::ce4:ddcc:551b:ef8c/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
7: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:56:c4:52 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
8: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:56:c4:52 brd ff:ff:ff:ff:ff:ff
[root@node1 network-scripts]#

终了

至此，文首我们遇到的问题，就已经全部解决了。

END

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