一：linux操作系统下双网卡绑定有七种模式。

一共七种方式，其中比较长用的是0/1/6：
首先，虚拟机或物理机上有4块网卡，eth0-3;eht0-1做绑定，用于外网连通；eth2-3做成绑定，用于内网连通。

1，绑定内网网卡到bond1：

1.1 第一组配置，将eth2和eth3绑定到bond1:

[root@kvm-1 network-scripts]# cat ifcfg-bond1 
BOOTPROTO=none
NAME=bond1
DEVICE=bond1
TYPE=Bond
BONDING_MASTER=YES
ONBOOT=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
BRIDGE=br1  #桥接到br1

1.2 配置br1:

[root@kvm-1 network-scripts]# cat ifcfg-br1 
TYPE=Bridge
BOOTPROTO=none
DEFROUTE=YES
PEERDNS=YES
PEERROTUES=YES
NAME=br1
DEVICE=br1
ONBOOT=YES
IPADDR=172.16.36.70
PREFIX=24

1.3 配置eth2:

[root@kvm-1 network-scripts]# cat ifcfg-eth2
# Generated by parse-kickstart
IPV6INIT="no"
IPV6_AUTOCONF="no"
BOOTPROTO="none"
DEVICE="eth2"
ONBOOT="yes"
MASTER=bond1    #主节点
USERCTL=no  #是否允许非root用户控制该设备
SLAVE=yes   #从节点

1.4 配置eth3:

[root@kvm-1 network-scripts]# cat ifcfg-eth3
# Generated by parse-kickstart
IPV6INIT="no"
IPV6_AUTOCONF="no"
BOOTPROTO="none"
DEVICE="eth3"
ONBOOT="yes"
MASTER=bond1    #主节点
USERCTL=no  #是否允许非root用户控制该设备
SLAVE=yes   #从节点

1.5 重启网络生效,并验证连通性：

[root@kvm-1 network-scripts]# systemctl restart network
[root@kvm-1 network-scripts]# ping 172.16.36.1
PING 172.16.36.1 (172.16.36.1) 56(84) bytes of data.
64 bytes from 172.16.36.1: icmp_seq=1 ttl=64 time=0.552 ms
64 bytes from 172.16.36.1: icmp_seq=2 ttl=64 time=1.12 ms
64 bytes from 172.16.36.1: icmp_seq=3 ttl=64 time=6.54 ms
64 bytes from 172.16.36.1: icmp_seq=4 ttl=64 time=1.37 ms

2, 绑定外网网卡到bond0

2.1 第二组配置，将eth0和eth1绑定到bond0:

[root@kvm-1 network-scripts]# cat ifcfg-bond0
BOOTPROTO=none
NAME=bond0
DEVICE=bond0
TYPE=Bond
BONDING_MASTER=YES
ONBOOT=YES
BONDING_OPTS="mode=1 miimon=100"
BRIDGE=br0

2.2 配置br0:

[root@kvm-1 network-scripts]# cat ifcfg-br0
TYPE=Bridge
BOOTPROTO=none
DEFROUTE=YES
PEERDNS=YES
PEERROTUES=YES
NAME=br0
DEVICE=br0
ONBOOT=YES
IPADDR=172.20.44.190
PREFIX=16
GATEWAY=172.20.0.1
DNS1=202.106.0.20

2.3 配置eth0:

[root@kvm-1 network-scripts]# cat ifcfg-eth0
# Generated by parse-kickstart
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
BOOTPROTO="none"
DEVICE="eth0"
ONBOOT="yes"
MASTER=bond0
USERCTL=no
SLAVE=yes

2.4 配置eth1:

[root@kvm-1 network-scripts]# cat ifcfg-eth1
# Generated by parse-kickstart
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
BOOTPROTO="none"
DEVICE="eth1"
ONBOOT="yes"
MASTER=bond0
USERCTL=no
SLAVE=yes

2.5 重启网络生效,并验证连通性：

[root@kvm-1 network-scripts]# systemctl restart network
[root@kvm-1 network-scripts]# ping 172.20.0.1
PING 172.20.0.1 (172.20.0.1) 56(84) bytes of data.
From 172.20.240.150 icmp_seq=1 Redirect Network(New nexthop: 172.20.0.1)
From 172.20.240.150 icmp_seq=1 Redirect Network(New nexthop: 172.20.0.1)
From 172.20.240.150 icmp_seq=1 Redirect Network(New nexthop: 172.20.0.1)
From 172.20.240.150: icmp_seq=1 Redirect Network(New nexthop: 172.20.0.1)
From 172.20.240.150: icmp_seq=1 Redirect Network(New nexthop: 172.20.0.1)
From 172.20.240.150: icmp_seq=1 Redirect Network(New nexthop: 172.20.0.1)