Need 2 untagged vlans on one port.

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I have an wireless access point that has 2 different VLANs.   One for secured wireless and one for public.  In setting this up, I need to configure an port that will allow 2 untagged VLANs on one port.  On my 3com switch, I did this with using an hybrid port.  I have not been able to configure this using my extreme network switch which is an X440-48t.   Any suggestions??? 
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Sandra Smith

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Posted 5 years ago

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Paul Russo, Alum

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Official Response
Hey Sandra

From my understanding a hybrid port is simply an uplink port.  The standard is very clear that you can have only one untagged port on a VLAN using 802.1Q.  On the Extreme side the way we would allow two VLANs on the same port is either tagging one VLAN (802.1Q) or by using protocol based VLANs.  Protocol based VLANs allows for the switch port to determine which VLAN the traffic is destined for by protocol type only.

Having two VLANs both untagged with no protocol match is not supported.  In addition I don't see the reason as the two end nodes, the AP and the Switch, would have no way to determine if a packet is for the private or public VLAN.

I am curious how the AP is allowing the two VLANs to go out the Ethernet without tagging one of them

I hope that helps