Overlay technology

IEEE 802.1aq : SPB (Shortest Path Bridging) / IS-IS / 16million / Only Service access points / L2, L3

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IEEE 802.1Q: Vlan Tagging / STP, Switch Clustering / 4096 ID / Edge and Core

IEEE 802.1ad: Q-in-Q, Provider Bridging / STP, Switch Clustering / 4096x4096 / Edge and Core

IEEE 802.1ah: MAC-in-MAC, Provider Backbone Bridging / STP, Switch Clustering / Edge and Core

802.1D (2004) - MAC Bridges

802.1p - Traffic Class Expediting and Dynamic Multicast Filtering (in 802.1D-1998)

802.1Q - Virtual LANs

802.1s - Multiple Spanning Trees

802.1w - Rapid Reconfiguration of Spanning Tree

802.1ag - Connectivity Fault Management

802.1ah - Provider Backbone Bridges

802.1aq - Shortest Path Bridging

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