Linux – bridge network between two linux servers

bridgecentoslinuxnetworking

I need to set up following network architecture :

                       Internet
                        ^   
+-----------------+     |          +------------------+
|  Centos6-1      |     |          |      Centos6-2   |
|      +---- eth0 + ----+          |                  |
| (br0)|          |                |                  |
|      +---- eth1 +----------------+ eth0             |
+-----------------+                +------------------+
                     ( cable connection )

Two public IP's are to be configured like follows :

  • eth0 and eth1 of **Centos6-1 are to be configured as a bridge with IP1
  • Centos6-1 can be accessed with IP1
  • eth0 of Centos6-2 is configured with IP2
  • any request destined to IP2 will flow through Centos6-1

How can i accomplish this feat?

There is a service running in the second server. This service will bind to IP2. what will happen

Edit:

If i do the following in box1:

brctl addbr br0
ifdown eth0
ifdown eth1
ifconfig eth0 0.0.0.0 up
ifconfig eth1 0.0.0.0 up
ifconfig br0 IP1 ****

would it do what i want?

Best Answer

According to this blog, you can setup bridge under CentOS in this way:

You have to add /etc/sysconfig/network-scripts/ifcfg-br0:

DEVICE=br0
TYPE=Bridge
BOOTPROTO=static
DNS1=192.168.0.1
GATEWAY=192.168.0.1
IPADDR=192.168.0.100
NETMASK=255.255.255.0
ONBOOT=yes
SEARCH=”example.com”

And in the ifcfg-eth0:

DEVICE=eth0
HWADDR=00:1e:90:f3:f0:02
ONBOOT=yes
TYPE=Ethernet
IPV6INIT=no
USERCTL=no
BRIDGE=br0

ifcfg-eth1 will be similar.

HWADDR you have to have MAC address of eth0, resp. eth1...

Between two servers you have to have crossover Ethernet cable...

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