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US 2010/0182937 A1Published application
Vpls n-pe redundancy with stp isolation
AssigneeCisco Technology, Inc.
InventorPatrice Bellagamba
Life of this patent
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Abstract
In one embodiment, a system includes a first network, a second network, and a core network connecting the first network to the second network. The first network includes a first set of two or more network devices, wherein the first network has a first spanning tree associated therewith. Similarly, the second network includes a second set of two or more network devices, wherein the second network has a second spanning tree associated therewith, wherein the second spanning tree is separate from the first spanning tree.
Claims20
A system, comprising:
- a first network including a first set of two or more network devices, wherein the first network has a first spanning tree associated therewith;
- and
- a second network including a second set of two or more network devices, wherein the second network has a second spanning tree associated therewith, wherein the second spanning tree is separate from the first spanning tree;
- wherein a core network connects the first network to the second network.
1 more element
A system, comprising:
- a network including a set of two or more network devices, wherein the network has a spanning tree associated therewith;
- wherein the set of two or more network devices of the network includes two redundant network devices;
- and
- wherein a first one of the two redundant network devices and a second one of the two redundant network devices each runs a communication protocol to prevent both of the two redundant network devices of the network from simultaneously being in an active state such that the first one of the two redundant network devices confirms that the second one of the two redundant network devices is in a backup state before the first one of the two redundant network devices enters an active state.
1 more element
A method, comprising:
- generating a spanning tree by a set of two or more network devices in a network, wherein the set of two or more network devices of the network includes two redundant network devices;
- and
- transmitting by a first one of the two redundant network devices a first message to a second one of the two redundant network devices via a communication protocol before the first one of the two redundant network devices enters an active state;
- receiving by the first one of the two redundant network devices a second message from the first one of the two redundant network devices via the communication protocol, wherein the communication protocol prevents both of the two redundant network devices of the network from simultaneously being in an active state;
- and
- entering the active state by the first one of the two redundant network devices after the second one of the two redundant network devices confirms via the second message that it is in a backup state.
3 more elements
Dependencies are inferred from the claim text.