【原创】CentOS8双网卡绑定

1. NAT网络配置（所有服务器）：

# yum install bash-completion

# cd /etc/sysconfig/network-scripts/

bond0配置：

# vim ifcfg-bond0

BOOTPROTO=static

NAME=bond0

DEVICE=bond0

ONBOOT=yes

BONDING_MASTER=yes

BONDING_OPTS="mode=1 miimon=100" #指定绑定类型为1及链路状态监测间隔时间

IPADDR=192.168.10.21

NETMASK=255.255.255.0

GATEWAY=192.168.10.2

DNS1=202.106.0.20

eth0配置：

# cat ifcfg-eth0

BOOTPROTO=static

NAME=eth0

DEVICE=eth0

ONBOOT=yes

MASTER=bond0

USERCTL=no

SLAVE=yes

ech1配置

# vim ifcfg-eth1

BOOTPROTO=static

NAME=eth1

DEVICE=eth1

ONBOOT=yes

MASTER=bond0

USERCTL=no

SLAVE=yes

2.仅主机网络配置

# cd /etc/sysconfig/network-scripts/

Bond1配置：

# vim ifcfg-bond1

BOOTPROTO=static

NAME=bond1

DEVICE=bond1

ONBOOT=yes

BONDING_MASTER=yes

BONDING_OPTS="mode=1 miimon=100" #指定绑定类型为1及链路状态监测间隔时间

IPADDR=192.168.20.21

NETMASK=255.255.255.0

eth2配置：

# vim ifcfg-eth2

BOOTPROTO=static

NAME=eth2

DEVICE=eth2

ONBOOT=yes

MASTER=bond1

USERCTL=no

SLAVE=yes

eth3配置：

# vim ifcfg-eth3

BOOTPROTO=static

NAME=eth3

DEVICE=eth3

ONBOOT=yes

MASTER=bond1

USERCTL=no

SLAVE=yes

3.查看网卡状态：

# nmcli c reload

# nmcli c up ethX

# 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,SLAVE,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bond0 state UP group default qlen 1000
link/ether 00:0c:29:9d:a6:a6 brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bond0 state UP group default qlen 1000
link/ether 00:0c:29:9d:a6:a6 brd ff:ff:ff:ff:ff:ff
4: eth2: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bond1 state UP group default qlen 1000
link/ether 00:0c:29:9d:a6:ba brd ff:ff:ff:ff:ff:ff
5: eth3: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bond1 state UP group default qlen 1000
link/ether 00:0c:29:9d:a6:ba brd ff:ff:ff:ff:ff:ff
6: bond1: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 00:0c:29:9d:a6:ba brd ff:ff:ff:ff:ff:ff
inet 192.168.20.50/24 brd 192.168.20.255 scope global noprefixroute bond1
valid_lft forever preferred_lft forever
7: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 00:0c:29:9d:a6:a6 brd ff:ff:ff:ff:ff:ff
inet 192.168.10.50/24 brd 192.168.10.255 scope global noprefixroute bond0
valid_lft forever preferred_lft forever