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System and method for providing a loop free topology in a network environment

  • US 8,559,341 B2
  • Filed: 11/08/2010
  • Issued: 10/15/2013
  • Est. Priority Date: 11/08/2010
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • executing an intermediate system to intermediate system (IS-IS) protocol for a first set of network links in a hybrid network;

    executing a spanning tree protocol (STP) for a second set of network links;

    generating a network topology that includes using a broadcast tree system identifier (ID) as a root bridge ID for the hybrid network;

    communicating the root bridge ID to a neighboring network element;

    wherein the broadcast tree system ID is associated with the IS-IS protocol, and the root bridge ID is associated with the STP;

    wherein a layer 2 gateway spanning tree protocol (“

    L2G-STP”

    ) mechanism for implementing a segmented spanning tree and a layer 2 Gateway Interconnect Protocol (“

    L2GIP”

    ) mechanism for building adjacencies between network elements are provided to prevent loops in the hybrid network; and

    wherein the broadcast tree system ID is provided as the root bridge ID per virtual local area network (VLAN), and wherein the broadcast tree system ID is a Media Access Control address (MAC address).

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