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Re: [lwip-users] Virtual machines in the same host (bridge).

From: Sylvain Rochet
Subject: Re: [lwip-users] Virtual machines in the same host (bridge).
Date: Mon, 2 Feb 2015 18:53:01 +0100
User-agent: Mutt/1.5.21 (2010-09-15)

Hello Norberto,

On Mon, Feb 02, 2015 at 03:42:17PM -0200, Norberto R. de Goes Jr. wrote:
> Sorry Sylvain. The " brctl showmacs br0" after ARP:
> address@hidden norberto]# brctl showmacs br0
> port no mac addr is local? ageing timer
>   2 02:12:34:56:78:ab no  26.18
>   1 08:00:27:77:cf:c0 no  90.45
>   1 08:00:27:a8:38:00 no  26.18
>   1 08:00:27:c0:7d:ab yes   0.00
>   2 4e:e3:4e:82:61:32 yes   0.00
> address@hidden norberto]#
> When I ping the lwip (ip = from fedora-1:
> address@hidden workspace]$ ping
> PING ( 56(84) bytes of data.
> 64 bytes from icmp_req=1 ttl=255 time=0.642 ms
> 64 bytes from icmp_req=2 ttl=255 time=0.437 ms
> 64 bytes from icmp_req=3 ttl=255 time=0.454 ms
> 64 bytes from icmp_req=4 ttl=255 time=0.600 ms

Yeah, this still looks like a problem on the VM-to-VM-bridge, can't help 
much on this point. Are you sure your VM-to-VM-bridge allow learning of 
foreign MAC address ?

I am pretty sure it works for broadcast and fail at forwarding unicast, 
you can try setting lwIP MAC address to ff:ff:ff:ff:ff:ff, if lwIP don't 
filter that (I didn't actually checked the code) it might prove my point :)


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