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Re: [lwip-devel] Bridge Implementation

From: Sylvain Rochet
Subject: Re: [lwip-devel] Bridge Implementation
Date: Fri, 10 Feb 2017 16:15:13 +0100
User-agent: Mutt/1.5.23 (2014-03-12)

Hi Joel,

On Fri, Feb 10, 2017 at 09:02:05AM -0600, Joel Cunningham wrote:
> Agree that the bulk of the bridge implementation would probably be 
> some kind of virtual netif, but the one piece that I need to 
> think/learn more about is how ARPing for the bridge’s IP address works 
> because there is a different hardware address for each interface

They are not really used. An Ethernet switch (a bridge) doesn't have a 
mac address per se, or only one for its administrative interface over a 
virtual IP interface. Some bridge implementation use either a randomly 
generated one or the one of the first added interface.

It means we need a layer 2 router implementation (an Ethernet switch) 
below everything else with virtual Ethernet interface support if we want
more than just a bridge.


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