WLC 9800 Feature ip-mac binding

[patoberli]

Hi All

I recently discovered that the WLC 17.9.1 offers in the Policy Profile an option to enable/disable IP MAC Binding, which is required for example when using VMware Workstation with a bridged Guest, so that both, the host and guest can get an IP address through the same Wi-Fi adapter. Only works with Central Switched VLANs and not with FlexConnect (at the moment while testing).

On 17.3.5a I can't see this option. Nor did I see any mention in the release notes from 17.2 - 17.9 about this new feature. 

I wonder when this was added. 

The documentation of 17.2 already mentions something about this here:
https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/17-2/config-guide/b_wl_17_2_cg/dhcp_for_wlans.html#id_130537

Does anybody have more information?

Thanks,
Patrick

[patoberli]

I found some time for testing. This feature was added somewhere between 17.7 and 17.9 in the GUI. 

CLI command for it is:

wireless profile policy PROFILENAME
no ip mac-binding
exit

What I need to test though, if this also enables the use of Wireless Bridges with LAN attached clients. 

[Rich R]

I can see it in 17.6 configs though ...
The description though is more about enabling seamless roaming between APs on flex local switching.

[jimaher]

I have this working in a lab in Flex mode.  It allows multiple wireless clients to have the same IP address.

[dominikhug]

Could you maybe share how you managed to get this working? I'm trying to have an IP assigned with DHCP to a virtual machine running on VMWare Workstation in bridged mode in a FlexConnect environment. I can see DHCP Discovery arriving on DHCP server and DHCP Offer leaving siwtchport in direction access point. But nothing arrives on WiFi-NIC and therefore not on the virtual machine. IP assignment on the host where VMWare is running works fine.