Linux不同网口不同VLAN之间作桥接，单一网口不同VLAN作桥接可以工作吗？

Roemer

比如

   brctl addif br0 eth0.2
   brctl addif br0 eth0.3

或者

   brctl addif br0 eth0.2
   brctl addif br0 eth1.3

好像不能工作阿？

有哪位大虾试过吗？

smalloc

可以工作.只是你没用对
对VLAN的概念没弄清楚
建议看看 <网络互连> Perlman.

eth0 到eth0.2是解VLAN头 过BR0 然后从eth1.3转到eth1是加VLAN头.
所以从eth1出去的包要用eth1.3相同的tag的VLAN才能收到.

同样传给eth0的包只有和eth0.2相同的VLAN tag才被eth0.2上传

smalloc

从VLAN端口上行的数据包都已经去掉VLAN头部了.在通过BR时就和普通的以太网数据包一样

Roemer

我就是想在VLAN 2 3之间做通信~~
按照你的意思br0可以在VLAN 2 ,3之间转发数据？
(自动执行TAG 2 <=>3 之间的转化)

Roemer

在网上看到一篇文章~


HowTo: VLAN's and Bridging through network-scripts


Bridging over VLAN's
What?

As if you weren't confused enough already, now let's combine the two concepts and create a bridge across a VLAN. That would be a bridge between two ethernet interfaces, where one is a real ethernet card in the PC (or a wifi, or some other regular type of ethernet interface), and the other will be a VLAN interface.
Why?

Let's say you have a piece of equipment which by itself doesn't know how to talk VLAN -but you want to connect it to a VLAN. By constructing a bridge between a "normal" and a "VLAN" ethernet interface, the Linux computer will add and remove the VLAN headers on behalf of any other device(s) plugged into the "normal" card.
How?

Okay, now for the tricky part. It takes a slight modification of the procedures above.  For this example, let's presume we have an ethernet interface eth0 connected to the network where a VLAN id 2 is present, and we have a device or devices on eth1 that need to be bridged into that VLAN 2.

Go ahead and first construct the VLAN interface like we did before (copy ifcfg-eth#, change DEVICE, add VLAN=yes), except also remove the BOOTPROTO, IPADDR, NETMASK, and GATEWAY lines if present.  Add a line BRIDGE=br2 (or a different named bridge device of your choice).