Thanks Ryan_Miles, having throughput cutdown is something I would like to avoid. Therefore I think Distributed L3 Roaming is the right option for me.  Given the large number of access switches in the network, and as they all connects to the spine layer over L3 running eBGP. Therefore I will have a WiFi VLAN per access switch.  It looks like if I don't have multiple APs in the same VLAN, clients will always get the anchored to the first AP they get connected. Given that DHCP lease is longer, they will always be hooked to that AP.  With the concentrator tunnels, it seems I will get bandwidth capped for 50%.  Looks like there isn't much options other than having a connection to the MX from multiple access switches and putting multiple APs in the same VLAN. ... View more