[Tfug] Network partitioning

[Harry McGregor]

On 11/4/13 1:23 PM, Bexley Hall wrote:
> Hi Harry,
>
> [Was thinking of you the other night as I pondered whether I could
> risk another BBQ buger!  :> ]
>
Maybe in December.  Not in Tucson right now.

> By "low end routers", do you mean what "normal folk" call a
> router or a *real* router?

I am talking consumer grade routers, take a look at http://www.dd-wrt.com

Asus makes a rather good line of wireless routers that support dd-wrt,
and can do port based vlans, and routing.

http://www.newegg.com/Product/Product.aspx?Item=N82E16833320088

> E.g., I always thought things like the "wireless routers"
> (WRT54G) were *switches* with a WLAN and radio interface.
> (i.e., anything on the switch side could talk to anything else
> on the switch side, etc.)

The switches actually have to be able to support vlans, since the SOC in
the router normally only has one ethernet port, so they use tagged vlans
to get the "internet" port and the "internal" network to the SOC's cpu.

Also they tend to use Linux 802.1d bridging to bridge the wireless
controller and the wired network, and you can disable that bridge, and
disable the radio.

This diagram gives you an idea of how the network is typically configured

http://www.dd-wrt.com/wiki/images/thumb/6/64/Ddwrtlogicview.jpg/600px-Ddwrtlogicview.jpg

You can define additional vlans using DD-WRT and control the routes on
them, as if they are interfaces on a linux box.

http://www.dd-wrt.com/wiki/index.php/VLAN_Support

http://www.dd-wrt.com/wiki/index.php/Detached_Networks_using_VLAN <---
this is very close to what you are trying to do.

-Harry
>
> I'll have to look into this.
>
> Thx,
> --don
>
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