Spanning tree protocol synchronization within virtual private networks
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United States of America Patent
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Dec 9, 2008
Grant Date -
N/A
app pub date -
Feb 16, 2005
filing date -
Aug 27, 2004
priority date (Note) -
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Abstract
Loop detection information, such as information associated with the Spanning Tree Protocol (STP), is synchronized within virtual private networks. A routing protocol, such as the Border Gateway Protocol (BGP), is extended in a manner that allows STP information or other loop detection information to be opaquely communicated between routing devices across an intermediate network. These techniques may, for example, be useful in environments where Virtual Private LAN Service (VPLS) is run through one or more intermediate networks.
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