Virtual L2TP/VPN tunnel network and spanning tree-based method for discovery of L2TP/VPN tunnels and other layer-2 services
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United States of America Patent
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Jul 20, 2004
Issued Date -
N/A
app pub date -
Dec 6, 2000
filing date -
Dec 6, 2000
priority date (Note) -
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Abstract
A virtual L2TP/VPN tunnel network as well as a system and method for automatic discovery of VPN tunnels, such as L2TP tunnels, and other layer-2 services using a method such as one based on the spanning tree protocol are disclosed. The method for automatic discovery of layer-2 services across a network of layer-2 devices generally comprises transmitting an advertisement message on each tunnel of each layer-2 device, the advertisement message containing information for generating a spanning tree based on spanning tree algorithm, receiving advertisement message on the tunnels of each layer-2 device, and processing the received advertisement messages to generate a spanning tree topology of the network of layer-2 devices whereby each layer-2 device in the network automatically discovers layer-2 services of other layer-2 devices on the network. The transmitting is preferably repeated at predetermined configurable intervals.
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