WLAN Mesh in CAPWAP Architecture May 2004 WLAN Mesh in CAPWAP Architecture Tyan-Shu Jou, Ted Kuo, and Ming Sheu tsjou@janusysnetworks.com Janusys Networks, Inc. Date: May 10, 2004 Tyan-Shu Jou, et al., Janusys Networks

CAPWAP Taxonomy Draft 02 Centralized WLAN architecture Month 2002 doc.: IEEE 802.11-02/xxxr0 May 2004 CAPWAP Taxonomy Draft 02 Centralized WLAN architecture Local MAC Split MAC Remote MAC Distributed Mesh Architecture: “WTPs are capable of forming a distributed network among themselves” Tyan-Shu Jou, et al., Janusys Networks John Doe, His Company

ESS Mesh Might be a Hybrid Architecture Month 2002 doc.: IEEE 802.11-02/xxxr0 May 2004 ESS Mesh Might be a Hybrid Architecture Mesh nodes form a distributed network A centralized control may exist for control, configuration, user access control, and monitoring purpose Local MAC Split MAC Remote MAC may not make much sense in this case Tyan-Shu Jou, et al., Janusys Networks John Doe, His Company

May 2004 CAPWAP Tunnels Mesh nodes can utilize the “virtual tunnels” to forward data traffic to the wire-wireless border node. In this case, management function may still exist in a different AC entity. Tyan-Shu Jou, et al., Janusys Networks

Mutual Authentication May 2004 Mutual Authentication WTP-WTP mutual authentication becomes a must. Tyan-Shu Jou, et al., Janusys Networks

CAPWAP Problem Statement May 2004 CAPWAP Problem Statement Large-scale wireless networks expose the following issues: Management Control Consistent Configuration Dynamic Nature Securing Access ESS Mesh with centralized control can help Tyan-Shu Jou, et al., Janusys Networks

More Complicated Models May 2004 More Complicated Models Mesh nodes can be separated into active nodes and passive nodes Tunnels to border nodes may be utilized (for certain traffic) AC may exist for management, user access control, and/or configuration Tyan-Shu Jou, et al., Janusys Networks

A Multi-Tier Split-Architecture ESS Mesh Network May 2004 A Multi-Tier Split-Architecture ESS Mesh Network AC Link between active nodes can be wired or wireless Border Node Link between passive node and active node can be wired or wireless Active Node Passive Node STAtion Tyan-Shu Jou, et al., Janusys Networks