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82 posts

Master Geek


# 142790 24-Mar-2014 19:35
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Hello, regarding a situation where you have multiple VLANs allocated to multiple wireless SSIDs. The traffic is received on a particular SSID and sent to the wireless controller which categorizes the traffic with vlan tags based on the the SSID that the traffic came in on.
The controller then sends the traffic back onto the network across a trunk link with the appropriate VLAN tag.
I understand this process and see it is called a "lightweight WAP configuration".
My question is, is there a "heavyweight WAP" option, where it is the access point (multiple SSID WAP) that does the VLAN tagging according to the SSID it came in on. This access point is connected to the switch across a trunk. In this configuration the wireless controller is only used for config and control of the WAPS, while the VLAN/SSID match-up and tagging is done by the WAP. Is this sort of config ever used in addition to the first one I outlined ?

Thanks for any info.

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  # 1012041 24-Mar-2014 19:44
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You're talking about a very specific Cisco specific setup.

I'm not sure l fully your question, but the setup you describe in the second post is how probably 80% of wireless equipment on the market without a controller works (and many vendors have moved away from a controller because of all the limitations it imposes).

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  # 1012069 24-Mar-2014 21:15
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The other option is where each user gets assigned a vlan based on their auth details, all on the one ssid. I have only seen that on one install and it was perpetually broken with association but no traffic for getting a DHCP lease till you release and renewed it because of how badly designed their network was.

But one SSID per vlan is quite limiting when AP's only usually let you make a maximum of 4 of them.



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  # 1012089 24-Mar-2014 21:40
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Unifi does what I think you want to do. In fact I would guess pretty much most of the mainstream wireless kit will do this.

When tagged traffic gets to an AP it will be un-tagged and sent to the correct WLAN. Traffic from a WLAN is then tagged on it's way out of the AP back to the switch.

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  # 1012096 24-Mar-2014 21:52
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We do this on Unifi, multiple vlans delivered across a trunk from the distribution switch each associated with a different SSID (guest, main etc.) works great.

Speedtest 2019-10-14

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  # 1012097 24-Mar-2014 21:54
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It works great until you need 5...


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  # 1012117 24-Mar-2014 22:54
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richms: It works great until you need 5...

Which is when you would move to 802.1x or RADIUS


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  # 1012321 25-Mar-2014 10:59
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I do this on a Ruckus Wireless setup.

Staff SSID = VLAN 2
Students = VLAN 3
Visitors = VLAN 70

Works a treat and the AP handles it all rather than the controller.

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