On Fri, Jan 24, 2003 at 11:18:25AM -0500, Josh Wyatt wrote:

> Hi All,
> 
> I have three questions regarding the bridging capability in the 2.4.x
> kernels:
> 
> 1. What's the limit on number of interfaces that can be bridged together
> under a single bridge interface?

I think 255 or 256.  This limit comes from having to assign all subdevices
a Spanning Tree port number, and this field in the STP packet is 8 bits (I
think later specs extended it to 12 bits or something though).


> 2. Can all types of ethernet-encapsulated interfaces be bridged?  I.e.
> tap devices, etc?

If it is ARPHRD_ETHER (such as TAP is), it will work.

Things like PPP will NOT work.


> 3. A specific case of #2, can bridge devices be bridged together?  (as a
> way to extend scalability related to #1, or for other reasons?)

No, this will give you an error.

I can't think of a situation where it would be useful.

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