[Svc]linux Bridge-docker Network Bridge

Bridges and Switches

2-Port switch = Bridge

Switch: Works on the data link layer, based on the source Mac Learning (control layer), the purpose of MAC forwarding (data layer).

Network adapter for Linux

Bridging in VMware Workstation

Reference: http://blog.daocloud.io/docker-bridge/

Bridging the Docker0

Reference: http://blog.daocloud.io/docker-bridge/

Bridge Operation Tool

yum install bridge-utils -y如果需要使用网桥模式,需要关掉NetworkManager服务systemctl stop NetworkManager systemctl disable NetworkManager

Two network cards are placed under a bro

We already know that the BR Nic is a virtual bridge, which is equivalent to a switch that can connect eth0 access eth1

Realize

Method 1: Command-line configuration

- 添加br0brctl addbr br0- 将eth0连到br0brctl addif br0 eth0brctl addif br0 eth1- 清理eth0的地址-这里有点问题吧ifconfig eth0  0.0.0.0- 配置br0的地址ifconfig br0 192.168.1.10 netmask 255.255.255.0 upbrctl addif br0 ath0

Method 2: Persist the configuration

Reference: http://www.solutionsatexperts.com/how-to-create-a-bridge-interface-on-rhelcentos/

-Planning combine eth1 and eth2 physical interfaces and create a virtual interface Br0, assign IP to It.eth1:No IPeth2           : No ipnote:eth1 and eth2 connect to same physical layer/media.br0–> eth1–> eth2 NOTE:BR0 is a virtual interface mapped to eth0 and eth1br0–> 192.168.1.10netmask–> 255.255.255.0G ateway–> 192.168.1.1dns–> 8.8.8.8-Procedure Step 1:disable Network managerstep 2:create virtual Interfa  Ce br0step 3:configure physcial interfaces eth1 and Eth2step 4:restart Network Service and verify network Settingsstep  1:disable Network Managersystemctl Stop NetworkManager # NIC on bridge mode needs to be turned off Networkmanagerstep 2:create virtual interface Br0add ifcfg-br0 file under/etc/sysconfig/network-script/#vi/etc/sysconfig/network-scripts/ifcfg-br0device= br0type=bridgeonboot=yesbootproto=staticipaddr=192.168.1.10netmask=255.255.254.0gateway=192.168.1.1dns1= 114.114.114.114dns2=8.8.8.8save & Exit (: Wq) Step 3:  Configure physcial interfaces eth1 and eth2vi/etc/sysconfig/network-script/ifcfg-eth1device=eth1bootproto= Staticonboot=yesbridge=br0type=ethernetsave & Exit (: WQ) Step 4:restart Network Service and verify network Settingsre Start the network services# systemctl restart networkverify network settings# ifconfig-a

Need a PC to surf the internet via another two-port Linux server

Here to understand, the interaction data between the two bridges: Anza by Table (or NAT)

The idea is actually simple:

• 1. is to be virtual out of a bridge port
• 2. Bind the corresponding wired LAN and wireless LAN to this virtual bridge port and assign an address to the bridge port
• 3. Other subnets microcomputer configuration gateway is the address of bridge port can be.
• 4. Of course, because the device is a gateway mode, Routing and NAT are also required.

源地址转换iptables -t nat -A POSTROUTING -o eth1 -j SNAT --to 192.168.1.10

Brctl command

$ docker run -itd --name=b1 busybox$ brctl showbridge name bridge id       STP enabled interfaces      docker0     8000.0242fb188161   no      veth0a226d0                                                                               $ docker run -itd --name=b2 busybox                                    $ brctl showbridge name bridge id       STP enabled interfaces  docker0     8000.0242fb188161   no      veth0a226d0                                        vethd9de1b2                                                                                $ brctl showshow      showmacs  showstp- 看到容器的mac地址,docker0这个交换机下接了2个$ brctl showmacs docker0port no mac addr        is local?   ageing timer  1 02:42:ac:11:00:02   no         2.36$ docker exec -it b1 ip ad14: [email protected]: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue     link/ether 02:42:ac:11:00:02

Configuration of the loopback port in Linux

ifconfig lo 130.0.0.1  

[Svc]linux-docker Network Bridge