Re: [lwip-devel] Bridge Implementation

[Joel Cunningham]

> On Feb 9, 2017, at 1:54 PM, address@hidden wrote:
> 
> Joel Cunningham wrote:
>> I’ve got an upcoming project that may need to implement a layer 2 bridge 
>> (multiple interfaces with a single IP address).
> 
> That's funny. I just had a look at linux for that and decided it is way too 
> slow…

What performance issue did you uncover?

> 
>> Has anyone ever seen patches for LwIP adding this kind of support or 
>> discussions about the topic?
> 
> Unfortunately, I haven't seen open source code for that. I once have 
> implemented something similar (and it shouldn't be too hard to do this once 
> the functionality of such a bridge is understood), but this is a) closed 
> source and b) not fully portable.
> 

Definitely agree on the “understanding/defining the behaviors of a bridge”.  
Most stacks seem to have a bridge concept that is at least defined in man 
pages/online documentation, not sure I’ve seen the concept defined in an IEEE 
document.  We would have to define a set of features for a bridge in LwIP

Here’s an example for FreeBSD: 
https://www.freebsd.org/doc/en/books/handbook/network-bridging.html  

> I'd be interested in such a solution as well :-) And I might even take some 
> time to contribute…

Good to know there is other interest in this feature

Joel