Usually they should be forwarded as is but I have seen some switches
also dropping them. I have used this kind of setup several times
already successfully. for example I had a completely dumb unmanaged
netgear poe switch that was connected to a pfSense interface with
several vlans and some netgear accesspoints with multiple ssids where
each ssid was assigned to a seperate vlan. That worked/works
beautifully but like I said, probably depends on the switch. You'll
have to evaluate it with the specific model that you want to use.

                                    VLAN AP        VLAN AP
                                           |                     |
pfSense(VLANs)--------dumb netgear switch--------VLAN AP
                                           |                     |
                                    VLAN AP        VLAN AP

Holger

2009/6/27 Eugen Leitl <[email protected]>:
>
> I have a somewhat off-topic question. This involves pfSense
> as the firewall, though.
>
> If I use a dumb switch as a poor man's VLAN, will the
> Ethernet frame tagging get propagated to smart switches further
> downstream?
>
> --WAN-pfsense-LAN(dumb switch)-LAN(smart switch)-LAN(smart switch)
>               |                |                 |
>              dumb systems     smart systems     smart systems
>
> Or is this undefined, depending on whether the dumb switch can pass
> on 1522 Byte Ethernet frames downstream, which are 4 Bytes larger
> than the standard allows?
>
> --
> Eugen* Leitl <a href="http://leitl.org";>leitl</a> http://leitl.org
> ______________________________________________________________
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