Method and apparatus for checking continuity of leaf-to-root VLAN connections
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United States of America Patent
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Aug 8, 2006
Grant Date -
Nov 11, 2004
app pub date -
Dec 27, 2001
filing date -
Dec 27, 2001
priority date (Note) -
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Abstract
A virtual LAN (VLAN) has a number of segments connected by connections in a connection-oriented network. The topology of the VLAN is defined by a spanning tree. Cell sources on the connections send continuity checking cells in a direction toward the spanning tree root to corresponding cell sinks. The cell sinks can trigger a change in the topology of the VLAN if the reception of continuity checking cells is interrupted. The connection-oriented network may be an ATM network. The continuity checking cells may be OAM cells.
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