Linux host and Virtual machine Bridge making and network card link aggregation

First, Network Bridge production

1, the host Network Bridge production

Remove a host's/ETC/SYSCONFIG/NETWORK-SCRIPTS/IFCFG-ENP0S25

Add files under the/etc/sysconfig/network-scripts/ifcfg-br0 directory

#编辑主机的物理网卡文件vim/etc/sysconfig/network-scripts/ifcfg-enp0s25device=enp0s25bootproto=nonename=westosbridger=br0# Edit a virtual bridge file Vim/etc/sysconfig/network-scripts/ifcfg-br0device=br0onboot=yesbootproto=nonenetmask=255.255.255.0type =bridge# this way your host's bridge is made to communicate with your virtual machine successfully.

Note: After the modification is successful, you need to execute the following command:

Systemctl Stop networkmanager.service #让系统不记住你的网络状态systemctl Restart network #重启网络systemctl start Networkmanager.ser Vice

2, Virtual machine Network bridge production and deletion

Brctl show #查看系统的所有网桥 brctl addr br0 #系统添加一个虚拟网桥 ifconfig br0 172.25.254.231 netmask 255.255.   255.0 #为br0临时添加IP和netmask brtcl addif br0 eth0 #将虚拟网桥与虚拟网卡连接 ifconfig br0 down #将虚拟网桥停止 brctl delbr br0 eth0 #从虚拟网卡上移除虚拟网桥 brctl DELBR br0 #删除虚拟网桥

Second, link aggregation of network card

Link aggregation: Refers to a number of physical ports bundled together to become a logical port to achieve the load sharing of the output/incoming traffic throughput in each member port, the switch determines from which member port the packet is sent to the peer-to-peer switch based on the user-configured port load sharing strategy.

1. Bond interface (supports up to two NICs)

nmcli connection add type bond con-name  bond0 ifname bond0 mode active-backup ip4 172.25.254.231/24# adds an interface to the system, And give him 172.25.254.231 this ip   #在系统的/proc/net/bonding/bond0  can see the information nmcli connection add  type bond-slave con-name eth0 ifname eth1 master bond0# Add a NIC for the link aggregation interface eth0nmcli connection add type bond-slave con-name eth1 ifname  eth1 master bond0# add a NIC to the link aggregation interface eth1, if the eth0 nic is broken, automatically switch to eth1nmcli connection show     #查看系统的网卡ifconfig  eth0 down   #使eth0这块网卡宕掉nmcli   connection  delete eth0   #删除网卡eth0nmcli   connection delete eth1  # Remove the NIC eth0nmcli  connection delete bind0   #删除网卡eth0 

2. Team interface

The team interface and Bond interface is similar, but he has a stronger extensibility, up to 8 network cards, and it has more features, he has 4 functions, respectively, broadcast (broadcast fault tolerance) Roundrobin (balance Wheel) activebackup (main standby) LoadBalance (load Balancing).

NMCLI connection Add type team con-name TEAM0 ifname team0 mode config ' {"runner": {"name": Activebackup}} ' Ip4 172.25.254.2 31/24# add a team interface and give him 172.25.254.231 this interface nmcli connection add type Team-slave con-name eth0 ifname eth1 Master team0# Add a NIC for the link aggregation interface eth0nmcli connection add type Team-slave con-name eth1 ifname eth1 Master team1# add a NIC for the link aggregation interface eth1# Remove the same as the Bond interface.

This article is from the "13122323" blog, please be sure to keep this source http://13132323.blog.51cto.com/13122323/1955799

Linux host and Virtual machine Bridge making and network card link aggregation