(11) NIC bridging -- Redaht Linux

Bridging on Redhat Linux

Redhat Linux裡想要啟用bridge(IEEE 802.1d)功能，必須要先安裝bridge-utils套件；如果系統裡可以執行brctl這個指令，那麼你的系統已經可以建立bridge了。
假設現在要把eth0設定成bridge分享給VM作為與外部溝通的管道：

ifcfg-eth0	ifcfg-br0
DEVICE=eth0 BRIDGE=br0 BOOTPROTO=static ONBOOT=yes USERCTL=no NM_CONTROLLED=no	DEVICE=br0 TYPE=Bridge ONBOOT=yes BOOTPROTO=static IPADDR=192.168.10.22 NETMASK=255.255.255.0 GATEWAY=192.168.10.1 USERCTL=no NM_CONTROLLED=no

請注意這裡關於eth0只有啟用，並沒有賦予其他設定！重新啟動網路後，看看裡頭的資訊吧！

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP qlen 1000
    link/ether f4:6d:04:7b:be:13 brd ff:ff:ff:ff:ff:ff
3: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP 
    link/ether f4:6d:04:7b:be:13 brd ff:ff:ff:ff:ff:ff
    inet 192.168.10.22/24 brd 192.168.10.255 scope global br0
    inet6 fe80::f66d:4ff:fe7b:be13/64 scope link 
       valid_lft forever preferred_lft forever
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN 
    link/ether ca:f4:7c:0b:34:1f brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0

Bridge on bonding

延續先前bonding的設定，我們把bond0設定成bridge：

ifcfg-eth0	ifcfg-eth1	ifcfg-bond0	ifcfg-br0
DEVICE=eth0 BOOTPROTO=none NM_CONTROLLED=no ONBOOT=yes MASTER=bond0 SLAVE=yes USERCTL=no	DEVICE=eth1 BOOTPROTO=none NM_CONTROLLED=no ONBOOT=yes MASTER=bond0 SLAVE=yes USERCTL=no	DEVICE=bond0 TYPE=bonding BRIDGE=br0 BOOTPROTO=static # IPADDR=192.168.10.198 # NETMASK=255.255.255.0 # GATEWAY=192.168.10.1 # MTU=5000 ONBOOT=yes USERCTL=no NM_CONTROLLED=no BONDING_OPTS="mode=6 miimon=100 HOTPLUG=no	DEVICE=br0 TYPE=Bridge ONBOOT=yes BOOTPROTO=static IPADDR=192.168.10.22 NETMASK=255.255.255.0 GATEWAY=192.168.10.1

當然你想設定DHCP也行！別忘了重新啟動網路吧！

service network restart

參考文章：

• Bridging Network Connection

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