centos 7 配置多网卡bond
2019-08-19centos 7 配置多网卡bond，网卡绑定mode共有七种(0~6) bond0、bond1、bond2、bond3、bond4、bond5、bond6（常用的有三种）
mode=0：平衡负载模式，有自动备援，但需要”Switch”支援及设定。
mode=1：自动备援模式，其中一条线若断线，其他线路将会自动备援。
mode=6：平衡负载模式，有自动备援，不必”Switch”支援及设定
1、关闭 NetworkManager 服务
systemctl stop NetworkManager.service
systemctl disable NetworkManager.service
2、配置网卡1
vim /etc/sysconfig/network-scripts/ifcfg-eno24
TYPE=Ethernet
BOOTPROTO=none
USERCTL=no
DEVICE=eno24
ONBOOT=yes
MASTER=bond0
SLAVE=yes
配置网卡2
vim /etc/sysconfig/network-scripts/ifcfg-eno25
TYPE=Ethernet
BOOTPROTO=none
USERCTL=no
DEVICE=eno25
ONBOOT=yes
MASTER=bond0
SLAVE=yes
3、配置bond
vim /etc/sysconfig/network-scripts/ifcfg-bond0
TYPE=Bond
BOOTPROTO=none
ONBOOT=yes
USERCTL=no
DEVICE=bond0
IPADDR=192.168.1.4
PREFIX=24
GATEWAY=192.169.1.254
NM_CONTROLLED=no
BONDING_MASTER=yes
5、加bonding内核模板
modprobe --first-time bonding
lsmod | grep bonding 或者 modinfo bonding
6、配置bonding驱动
（实践该步骤未做，便可用）
vim /etc/modprobe.d/bond.conf
alias bond0 binding
options bond0 miimon=100 mode=1
7、重启网络服务
service network restart
查看bond0生效
cat /proc/net/bonding/bond0
8、配置dns
vim /etc/resolv.conf
nameserver 202.106.0.20
9、centos 7默认启动时没有加载bonding模块
# 查看bonding模块详细信息
modinfo bonding
filename /lib/modules/3.10.0-229.el7.x86_64/kernel/drivers/net/bonding/bonding.ko
# 配置系统启动时加载bonding模块
vim /etc/sysconfig/modules/bonding.modules
#!/bin/sh
/sbin/modinfo -F filename bonding > /dev/null 2>&1
if [ $? -eq 0 ];then
/sbin/modprobe bonding
fi
# 设置执行权限
chmod 755 /etc/sysconfig/modules/bonding.modules
# 重启查看是否生效
reboot
10、nmcli
systemctl NetworkManager start
nmcli connection add type bond con-name bond0 ifname bond0 mode active-backup
nmcli connection add type bond-slave ifname em1 master bond0
Connection 'bond-slave-em1' (9cf3468a-3425-4d6a-a4c3-d647a1a5ea92) successfully added.
nmcli connection modify bond0 ipv4.addresses 192.168.100.100/24 ipv4.method manual
nmcli connection up bond-slave-em1
nmcli connection up bond-slave-em2
nmcli connection up bond0
#############
nmcli connection down bond0
nmcli connection delete bond0
nmcli connection delete bond-slave-em1
nmcli connection delete bond-slave-em2
11、网络组：是将多个网卡聚合在一起方法，从而实现冗错和提高吞吐量；网络组不同于旧版中bonding技术，提供更好的性能和扩展性；网络组由内核驱动和teamd守护进程实现。
nmcli connection add type team con-name team0 ifname team0 config '{"runner":{"name":"activebackup"}}'
nmcli connection add type team-slave ifname em1 master team0
nmcli connection add type team-slave ifname em2 master team0
nmcli connection modify team0 ipv4.addresses 192.168.100.100/24 ipv4.method manual
nmcli connection up team-slave-em1
nmcli connection up team-slave-em2
nmcli connection up team0
teamctl team0 state
#############
nmcli connection down team0
nmcli connection down team-slave-em1
nmcli connection down team-slave-em2
nmcli connection delete team0
nmcli connection delete team-slave-em1
nmcli connection delete team-slave-em2