Flexconnect - local-switching - Interface Groups - multiple subnets/vlans

[Ric Beeching]

So I'm trying to setup an "interface-group-like" configuration on some Flexconnect APs with local switching enabled in order to support multiple subnets/VLANs linked to a single SSID.

Does anyone know if this is possible or have any suggestions?

I've tried:

• AP Groups - One SSID which would require central switching for it to be of use (I think).
• AP Groups - Creating an additional SSID and then placing the APs in a group per site. This works but is going to be difficult to manage if I have 400+ sites running this sort of setup.

For reference, my end goal is to have multiple (400+) branch sites with the same WLAN mapped to 3 or 4 different VLANs in order to split the subnets up into smaller chunks (/23s or /24s). These VLANs are all switched locally and are uniform in numbering across all the sites from a layer 2 perspective.

Thanks,

Ric

[Scott Fella]

Interface groups is not an available feature on FlexConnect. FlexConnect doesn't support layer 3 roaming if devices roam from one FlexConnect ap to another and the wlan to vlan mappings are different. This is a limitation to FlexConnect along with a few others listed in the FlexConnect deployment guide.

-Scott

[Ric Beeching]

Thanks for confirming. 

My best bet is to manually alter the mapping on groups of APs so that the same SSID points to different VLANs but as you said this would impact roaming and could also double up on my DHCP leases at each site.

Ric

[Abhishek Abhishek]

Yes, this is one of the disadvantages of using flex connect as layer 3 roaming is not supported.