Description:
IAPP (Inter Access Point Protocol) is used for exchanging information between access points. In the process information regarding logged in WiFi devices is transmitted. If a WiFi device switches to a new access point, this access point informs the old one, which removes the WiFi device from its station table. In doing so all login information is retained and the roaming takes place virtually seamlessly ("soft roaming"). Whereas when a "hard roaming" takes place, the WiFi device has to authenticate itself anew with the new access point.
When a WLAN Controller is used in conjunction with a WLC Tunnel, the roaming information is transmitted via the CAPWAP-DATA Tunnel.
IAPP uses the Multicast group 224.0.1.76 to communicate. Therefore communication within this group must be ensured in the IGMPv3 settings on the switches.
Additional Knowledge Base articles regarding IAPP:
- Roaming with LANCOM Access Points and WLAN routers
- LCOS as of version 10.20: Using the Client Management with LANCOM Access Points
- Activating IAPP in a single ARF network
- LCOS version 10.12 and later: Changes to the control of inter-client communications in the WLAN
- Setting up IGMP Snooping for multiple VLANs on a GS-23xx series switch
- Setting up IGMP snooping for multiple VLANs on a GS-3xxx series switch
