Linux Ethernet Bridging - Apr 2007 - [Bridge] Bridging multiple tap interfaces

On Thu, 19 Jan 2006 21:05:01 -0500
"Elangovan, Anush" <anush@fireeye.com> wrote:
> Is it possible to bridge multiple "tap" interfaces in Linux?
> 
> When two tap interfaces are bridged together they are unable to
"see"
> each other but they can bridge to external Ethernet interfaces or the
> hosts IP attached on the bridge. 
> 
> I saw some mention in the mailing list archives on bridging two user
> space processes but it didn't seem to have any conclusion. I also
> noticed some other wireless interfaces and tap interfaces are not able
> to be bridged. 
> 
> http://lists.osdl.org/pipermail/bridge/2005-December/001215.html
> 
> 
> So does the bridging code differentiate between the pseudo-devices
> before making forwarding decisions?
> 
> Thanks
> Anush
It could work now, since each tap should have it's own unique source
address. But remember anything being bridge has to "look and feel"
like
a standard Ethernet for it to work.  That means broadcast and address
filtering has to work as well.

Is it possible to bridge multiple "tap" interfaces in Linux?

When two tap interfaces are bridged together they are unable to "see"
each other but they can bridge to external Ethernet interfaces or the
hosts IP attached on the bridge. 

I saw some mention in the mailing list archives on bridging two user
space processes but it didn't seem to have any conclusion. I also
noticed some other wireless interfaces and tap interfaces are not able
to be bridged. 

http://lists.osdl.org/pipermail/bridge/2005-December/001215.html


So does the bridging code differentiate between the pseudo-devices
before making forwarding decisions?

Thanks
Anush