Specification Alternate Tunnel Information for Data Frames in WLAN

In IEEE 802.11 Wireless Local Area Network (WLAN) architecture, in order to satisfy the scalability requirement, customer data frames are desired to be distributed to an endpoint as Access Router(AR) different from the Access Controller (AC). For tunneling the data frames, there are many known alternate tunnel technologies can be used, such as IP-GRE, IP-in-IP, CAPWAP, L2TP/L2TPv3, etc. To assist a WTP to set up the alternate tunnels for data plane, this document extends the CAPWAP message elements.