A transport LAN segment service is provided over a transport network. The transport network will include edge devices configured to support one or more transparent LAN segments. Configuration is simplified by advertising TLS-port-label information, layer 2 address learning, and multicasting when the...http://www.google.com/patents/US20090080431?utm_source=gb-gplus-sharePatent US20090080431 - EDGE DEVICES FOR PROVIDING A TRANSPARENT LAN SEGMENT SERVICE AND CONFIGURATION SUCH EDGE DEVICES