1、IP分类及对应分类可分配IP数量
1.1 ip地址
ip地址由两部分组成：
- 网络ID：标识网络，每个网段分配一个网络id
- 主机ID：标识单个主机，由组织分配给各设备
1.2 ip地址分类
A类：
0 0000000-0 1111111.x.y.z ： 0-127.x.y.z
网络id位是最高8位，主机id是24位低位
网络数： 126=2^7(可标识的网络id位数)-2
每个网络中的主机数：2^24-2=16777214
默认子网掩码：255.0.0.0 CIDR: /8
B类：
10 000000 - 10 111111.x.y.z ： 128-191.x.y.z
网络id位是最高16位，主机id是16位低位
网络数： 2^14=16384
每个网络中主机数：2^16-2=65534
默认子网掩码：255.255.0.0 CIDR: /16
C类：
110 0 0000 - 110 1 1111.x.y.z ： 192-223.x.y.z
网络id位是最高24位，主机id是8位低位
网络数： 2^21 = 2097152
每个网络中主机数： 2^8-2=254
默认子网掩码：255.255.255.0 CIDR : /24
D类：组(多)播：
1110 0000 - 1110 1111.x.y.z ： 224-239.x.y.z
E类：保留未使用 ， 240-255
1.3 私有ip地址
A： 10.0.0.0 到 10.255.255.255
B： 172.16.0.0 到 172.31.255.255
C：192.168.0.0 到 192.168.255.255
2、IP配置方法
2.1 修改配置文件
[root@CentOS8 network-scripts]#pwd
/etc/sysconfig/network-scripts
[root@CentOS8 network-scripts]#vim ifcfg-ens33
TYPE=Ethernet
NAME=ens33
BOOTPROTO=static
DEVICE=ens33
ONBOOT=yes
IPADDR=10.0.0.8
PREFIX=24
GATEWAY=10.0.0.2
DNS1=202.101.224.68
2.2 ifconfig命令
来自net-tools包
[root@CentOS8 network-scripts]#ifconfig ens33:1 10.0.0.88/24
[root@CentOS8 network-scripts]#ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.0.8 netmask 255.255.255.0 broadcast 10.0.0.255
inet6 fe80::9c5c:b7f5:f8c5:58b2 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:69:25:9d txqueuelen 1000 (Ethernet)
RX packets 3947 bytes 5250179 (5.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1581 bytes 113778 (111.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens33:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.0.88 netmask 255.255.255.0 broadcast 10.0.0.255
ether 00:0c:29:69:25:9d txqueuelen 1000 (Ethernet)
2.3 nmcli 命令
[root@CentOS8 network-scripts]#nmcli connection show
NAME UUID TYPE DEVICE
ens33 6b0503bf-2617-47c3-a9fc-5db84ae7f527 ethernet ens33
Wired connection 1 92b5318e-2571-3007-9f54-093d8b092d7a ethernet ens37
Wired connection 2 9b4875a4-9935-3623-bc20-1a0812d65063 ethernet ens38
[root@CentOS8 network-scripts]#nmcli connection modify Wired\ connection\ 1 con-name ens37
[root@CentOS8 network-scripts]#nmcli connection modify ens37 ipv4.addresses 10.0.0.37/24 ipv4.gateway 10.0.0.2 ipv4.dns 202.101.224.68
[root@CentOS8 network-scripts]#nmcli connection reload
[root@CentOS8 network-scripts]#nmcli connection up ens37
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/4)
[root@CentOS8 network-scripts]#cat /etc/resolv.conf
# Generated by NetworkManager
search localdomain
nameserver 202.101.224.68
nameserver 10.0.0.2
nameserver 114.114.114.114
[root@CentOS8 network-scripts]#route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.0.0.2 0.0.0.0 UG 100 0 0 ens33
0.0.0.0 10.0.0.2 0.0.0.0 UG 103 0 0 ens37
0.0.0.0 10.0.0.2 0.0.0.0 UG 104 0 0 ens38
10.0.0.0 0.0.0.0 255.255.255.0 U 100 0 0 ens33
10.0.0.0 0.0.0.0 255.255.255.0 U 103 0 0 ens37
10.0.0.0 0.0.0.0 255.255.255.0 U 103 0 0 ens37
10.0.0.0 0.0.0.0 255.255.255.0 U 104 0 0 ens38
10.0.0.0 0.0.0.0 255.255.255.0 U 104 0 0 ens38
2.3.1 nmcli实现bonding
[root@CentOS8 network-scripts]#nmcli connection
NAME UUID TYPE DEVICE
ens33 6b0503bf-2617-47c3-a9fc-5db84ae7f527 ethernet ens33
ens37 92b5318e-2571-3007-9f54-093d8b092d7a ethernet ens37
ens38 9b4875a4-9935-3623-bc20-1a0812d65063 ethernet ens38
[root@CentOS8 network-scripts]#nmcli connection add type bond con-name bond0 ifname bond0 mode active-backup
Connection 'bond0' (c387a8ea-ac68-4ac4-8d10-f9554027461b) successfully added.
[root@CentOS8 network-scripts]#nmcli connection add type bond-slave ifname ens37 master bond0
Connection 'bond-slave-ens37' (d2650291-d933-4ae5-9206-3304358b7a0f) successfully added.
[root@CentOS8 network-scripts]#nmcli connection add type bond-slave ifname ens38 master bond0
Connection 'bond-slave-ens38' (04cb942c-9ec1-4669-986a-33588ad1532b) successfully added.
[root@CentOS8 network-scripts]#nmcli connection
NAME UUID TYPE DEVICE
bond0 c387a8ea-ac68-4ac4-8d10-f9554027461b bond bond0
ens33 6b0503bf-2617-47c3-a9fc-5db84ae7f527 ethernet ens33
ens37 92b5318e-2571-3007-9f54-093d8b092d7a ethernet ens37
ens38 9b4875a4-9935-3623-bc20-1a0812d65063 ethernet ens38
bond-slave-ens37 d2650291-d933-4ae5-9206-3304358b7a0f ethernet --
bond-slave-ens38 04cb942c-9ec1-4669-986a-33588ad1532b ethernet --
[root@CentOS8 network-scripts]#nmcli connection reload
[root@CentOS8 network-scripts]#nmcli connection up bond-slave-ens37
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/7)
[root@CentOS8 network-scripts]#nmcli connection up bond-slave-ens38
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/8)
[root@CentOS8 network-scripts]#nmcli connection up bond0 #必须首先启动从属接口
Connection successfully activated (master waiting for slaves) (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/9)
[root@CentOS8 network-scripts]#nmcli connection
NAME UUID TYPE DEVICE
ens33 6b0503bf-2617-47c3-a9fc-5db84ae7f527 ethernet ens33
bond0 c387a8ea-ac68-4ac4-8d10-f9554027461b bond bond0
bond-slave-ens37 d2650291-d933-4ae5-9206-3304358b7a0f ethernet ens37
bond-slave-ens38 04cb942c-9ec1-4669-986a-33588ad1532b ethernet ens38
ens37 92b5318e-2571-3007-9f54-093d8b092d7a ethernet --
ens38 9b4875a4-9935-3623-bc20-1a0812d65063 ethernet --
[root@CentOS8 network-scripts]#route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.0.0.2 0.0.0.0 UG 100 0 0 ens33
0.0.0.0 10.0.0.2 0.0.0.0 UG 300 0 0 bond0
10.0.0.0 0.0.0.0 255.255.255.0 U 100 0 0 ens33
10.0.0.0 0.0.0.0 255.255.255.0 U 300 0 0 bond0
[root@CentOS8 network-scripts]#ip a
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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:69:25:9d brd ff:ff:ff:ff:ff:ff
inet 10.0.0.8/24 brd 10.0.0.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet 10.0.0.88/24 brd 10.0.0.255 scope global secondary ens33:1
valid_lft forever preferred_lft forever
inet6 fe80::9c5c:b7f5:f8c5:58b2/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: ens37: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bond0 state UP group default qlen 1000
link/ether 00:0c:29:69:25:a7 brd ff:ff:ff:ff:ff:ff
4: ens38: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bond0 state UP group default qlen 1000
link/ether 00:0c:29:69:25:a7 brd ff:ff:ff:ff:ff:ff
5: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 00:0c:29:69:25:a7 brd ff:ff:ff:ff:ff:ff
inet 10.0.0.208/24 brd 10.0.0.255 scope global dynamic noprefixroute bond0
valid_lft 1775sec preferred_lft 1775sec
inet6 fe80::fc92:d6bc:cf4d:314f/64 scope link noprefixroute
valid_lft forever preferred_lft forever
2.3.2 创建bonding设备的配置文件
[root@CentOS8 network-scripts]# vim /etc/sysconfig/network-scripts/ifcfg-bond0
TYPE=bond
NAME=bond0
DEVICE=bond0
BOOTPROTO=static
IPADDR=10.0.0.88
PREFIX=24
BONDING_OPTS="mode=1 miimon=100" #miimon指定链路监测时间间隔，如果miimon=100，那么系统每100ms监测一次链路连接状态，如果有一条线路不通则转入另一条线路
[root@CentOS8 network-scripts]# vim /etc/sysconfig/network-scripts/ifcfg-ens37
DEVICE=ens37
BOOTPROTO=none
MASTER=bond0
SLAVE=yes
ONBOOT=yes
[root@CentOS8 network-scripts]# vim /etc/sysconfig/network-scripts/ifcfg-ens38
DEVICE=ens38
BOOTPROTO=none
MASTER=bond0
SLAVE=yes
ONBOOT=yes
[root@CentOS8 network-scripts]#nmcli connection up bond0
Connection successfully activated (master waiting for slaves) (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/10)
[root@CentOS8 network-scripts]#ip a
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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:69:25:9d brd ff:ff:ff:ff:ff:ff
inet 10.0.0.8/24 brd 10.0.0.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::9c5c:b7f5:f8c5:58b2/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: ens37: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bond0 state UP group default qlen 1000
link/ether 00:0c:29:69:25:a7 brd ff:ff:ff:ff:ff:ff
4: ens38: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bond0 state UP group default qlen 1000
link/ether 00:0c:29:69:25:a7 brd ff:ff:ff:ff:ff:ff
5: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 00:0c:29:69:25:a7 brd ff:ff:ff:ff:ff:ff
inet 10.0.0.88/24 brd 10.0.0.255 scope global noprefixroute bond0
valid_lft forever preferred_lft forever
#查看bond0状态：
[root@CentOS8 network-scripts]#cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: ens37
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Peer Notification Delay (ms): 0
Slave Interface: ens37
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:69:25:a7
Slave queue ID: 0
Slave Interface: ens38
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:69:25:b1
Slave queue ID: 0
2.4 ubuntu网络配置
root@ubuntu1804:/etc/netplan# pwd
/etc/netplan
root@ubuntu1804:/etc/netplan# cat 01-netcfg.yaml
# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
version: 2
renderer: networkd
ethernets:
ens33:
dhcp4: yes
2.4.1 配置静态ip
root@ubuntu1804:/etc/netplan# vim 01-netcfg.yaml
# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
version: 2
renderer: networkd
ethernets:
ens33:
addresses:
- 10.0.0.204/24
- 172.16.0.204/16
gateway4: 10.0.0.2
nameservers:
search: [ubuntu.com]
addresses: [202.101.224.68,8.8.8.8]
root@ubuntu1804:/etc/netplan# netplan apply
root@ubuntu1804:/etc/netplan# ip a
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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:fc:5c:eb brd ff:ff:ff:ff:ff:ff
inet 10.0.0.204/24 brd 10.0.0.255 scope global ens33
valid_lft forever preferred_lft forever
inet 172.16.0.204/16 brd 172.16.255.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fefc:5ceb/64 scope link
valid_lft forever preferred_lft forever
root@ubuntu1804:/etc/netplan# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.0.0.2 0.0.0.0 UG 0 0 0 ens33
10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 ens33
172.16.0.0 0.0.0.0 255.255.0.0 U 0 0 0 ens33
#查看DNS
root@ubuntu1804:/etc/netplan# ll /etc/resolv.conf
lrwxrwxrwx 1 root root 39 Feb 12 23:17 /etc/resolv.conf -> ../run/systemd/resolve/stub-resolv.conf
root@ubuntu1804:/etc/netplan# cat /etc/resolv.conf
# Run "systemd-resolve --status" to see details about the uplink DNS servers
# currently in use.
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.
nameserver 127.0.0.53
options edns0
search ubuntu.com
root@ubuntu1804:/etc/netplan# systemd-resolve --status
Global
DNSSEC NTA: 10.in-addr.arpa
16.172.in-addr.arpa
168.192.in-addr.arpa
17.172.in-addr.arpa
18.172.in-addr.arpa
19.172.in-addr.arpa
20.172.in-addr.arpa
21.172.in-addr.arpa
22.172.in-addr.arpa
23.172.in-addr.arpa
24.172.in-addr.arpa
25.172.in-addr.arpa
26.172.in-addr.arpa
27.172.in-addr.arpa
28.172.in-addr.arpa
29.172.in-addr.arpa
30.172.in-addr.arpa
31.172.in-addr.arpa
corp
d.f.ip6.arpa
home
internal
intranet
lan
local
private
test
Link 4 (ens39)
Current Scopes: none
LLMNR setting: yes
MulticastDNS setting: no
DNSSEC setting: no
DNSSEC supported: no
Link 3 (ens38)
Current Scopes: none
LLMNR setting: yes
MulticastDNS setting: no
DNSSEC setting: no
DNSSEC supported: no
Link 2 (ens33)
Current Scopes: DNS
LLMNR setting: yes
MulticastDNS setting: no
DNSSEC setting: no
DNSSEC supported: no
DNS Servers: 202.101.224.68
8.8.8.8
DNS Domain: ubuntu.com
2.4.2 配置多网卡静态IP和静态路由
root@ubuntu1804:/etc/netplan# vim /etc/netplan/01-netcfg.yaml
network:
version: 2
renderer: networkd
ethernets:
ens33:
addresses:
- 10.0.0.204/24
- 172.16.0.204/16
gateway4: 10.0.0.2
nameservers:
search: [ubuntu.com]
addresses: [202.101.224.68,8.8.8.8]
ens37:
dhcp4: no
dhcp6: no
addresses: [172.16.0.38/16]
gateway4: 172.16.0.2
nameservers:
addresses: [223.6.6.6]
ens38:
dhcp4: no
dhcp6: no
addresses:
- 172.18.0.39/16
routes:
- to: 172.16.0.0/16
via: 172.18.0.1
root@ubuntu1804:/etc/netplan# ip a
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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:fc:5c:eb brd ff:ff:ff:ff:ff:ff
inet 10.0.0.204/24 brd 10.0.0.255 scope global ens33
valid_lft forever preferred_lft forever
inet 172.16.0.204/16 brd 172.16.255.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fefc:5ceb/64 scope link
valid_lft forever preferred_lft forever
3: ens38: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:fc:5c:f5 brd ff:ff:ff:ff:ff:ff
inet 172.16.0.38/16 brd 172.16.255.255 scope global ens38
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fefc:5cf5/64 scope link
valid_lft forever preferred_lft forever
4: ens39: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:fc:5c:ff brd ff:ff:ff:ff:ff:ff
inet 172.18.0.39/16 brd 172.18.255.255 scope global ens39
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fefc:5cff/64 scope link
valid_lft forever preferred_lft forever
root@ubuntu1804:/etc/netplan# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.0.0.2 0.0.0.0 UG 0 0 0 ens33
10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 ens33
172.16.0.0 0.0.0.0 255.255.0.0 U 0 0 0 ens33
172.16.0.0 172.18.0.1 255.255.0.0 UG 0 0 0 ens38
172.18.0.0 0.0.0.0 255.255.0.0 U 0 0 0 ens38
2.4.3 多网卡绑定bonding
root@ubuntu1804:/etc/netplan# vim /etc/netplan/01-netcfg.yaml
ens33:
addresses:
- 10.0.0.204/24
- 172.16.0.204/16
gateway4: 10.0.0.2
nameservers:
search: [ubuntu.com]
addresses: [202.101.224.68,8.8.8.8]
ens38:
dhcp4: no
dhcp6: no
ens39:
dhcp4: no
dhcp6: no
bonds:
bond0:
interfaces:
- ens38
- ens39
addresses:
- 10.0.0.5/24
gateway4: 10.0.0.2
nameservers:
addresses: [202.101.224.68,223.6.6.6]
parameters:
mode: active-backup
mii-monitor-interval: 100
# 查看网卡信息
root@ubuntu1804:/etc/netplan# ip a
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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:fc:5c:eb brd ff:ff:ff:ff:ff:ff
inet 10.0.0.204/24 brd 10.0.0.255 scope global ens33
valid_lft forever preferred_lft forever
inet 172.16.0.204/16 brd 172.16.255.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fefc:5ceb/64 scope link
valid_lft forever preferred_lft forever
3: ens38: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bond0 state UP group default qlen 1000
link/ether ca:0c:9b:81:89:4c brd ff:ff:ff:ff:ff:ff
4: ens39: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bond0 state UP group default qlen 1000
link/ether ca:0c:9b:81:89:4c brd ff:ff:ff:ff:ff:ff
5: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether ca:0c:9b:81:89:4c brd ff:ff:ff:ff:ff:ff
inet 10.0.0.5/24 brd 10.0.0.255 scope global bond0
valid_lft forever preferred_lft forever
inet6 fe80::c80c:9bff:fe81:894c/64 scope link
valid_lft forever preferred_lft forever
#查看bonding信息
root@ubuntu1804:/etc/netplan# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: ens39
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: ens39
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:fc:5c:ff
Slave queue ID: 0
Slave Interface: ens38
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:fc:5c:f5
Slave queue ID: 0
2.4.4 修改网卡传统命名
注意：建议修改网卡配置文件前先修改网卡传统命名， 否则重启可能导致机器进不了系统
#修改配置文件
root@ubuntu1804:/etc/netplan# sed -i.bak '/^GRUB_CMDLINE_LINUX=/s#"$#net.ifnames=0"#' /etc/default/grub
#生效新的grub.cfg文件
root@ubuntu1804:/etc/netplan# grub-mkconfig -o /boot/grub/grub.cfg
#或者
root@ubuntu1804:/etc/netplan# update-grub
#重启生效
root@ubuntu1804:/etc/netplan# reboot
lee@ubuntu1804:~$ ip a
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: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:fc:5c:eb brd ff:ff:ff:ff:ff:ff
inet 10.0.0.204/24 brd 10.0.0.255 scope global eth0
valid_lft forever preferred_lft forever
inet 172.16.0.204/16 brd 172.16.255.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fefc:5ceb/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bond0 state UP group default qlen 1000
link/ether ca:0c:9b:81:89:4c brd ff:ff:ff:ff:ff:ff
4: eth2: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bond0 state UP group default qlen 1000
link/ether ca:0c:9b:81:89:4c brd ff:ff:ff:ff:ff:ff
5: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether ca:0c:9b:81:89:4c brd ff:ff:ff:ff:ff:ff
inet 10.0.0.5/24 brd 10.0.0.255 scope global bond0
valid_lft forever preferred_lft forever
inet6 fe80::c80c:9bff:fe81:894c/64 scope link
valid_lft forever preferred_lft forever
