On 7 Apr 2013, at 11:58, Maurice Poisson Adriasola wrote:

> On Apr 7, 2013, at 6:58 AM, Andrea Fino wrote:
> 
>> On 04/06/2013 07:18 PM, KP Kirchdoerfer wrote:
> 
> snip
> 
>>> Am 06.04.2013 18:27, schrieb Joep L. Blom:
>>>> Since mid 2012 a very small system has appeared on the market under 
>>>> the
>>>> name of the Raspberry PI.
> 
> snip
> 
>>>> Of course it has only 1 ethernet card on board and only 2 USB ports 
>>>> but
>>>> it has also GPIO pins to be used for peripherals.
> 
> snip
> 
>>> With only 1 NIC it does not fit really well for router. But at least
>>> LEAF can boot on a Raspberry Pi - a playground for probably new ideas.
>> 
>> Just wondering if I could put some usb-ethernet adapters or such on it.
>> Is that feasible?
> 
> Does the single Ethernet support VLAN tagged frames? Combining a one 
> Ethernet port LEAF host with a simple VLAN capable Ethernet switch, 
> linked to the routing host via a 801.1Q tagged trunk should result in a 
> multiport firewall.

USB <-> Ethernet adaptors should work, but performance might not be very good.
The on-board Ethernet NIC is actually connected via the USB bus anyway.

802.1q is provided by a separate kernel module and (in my experience) will be 
available on
any device that runs Bering-uClibc, so routing between different VLANs should 
work too.
I use a 3-NIC ALIX device like that to route "internal" traffic, but using 
separate physical NICs
to keep the Internet and DMZ connections separate from the more trusted 
connections.

david


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