Back to results
US 7,680,113 B2Granted
Inter-FE MPLS LSP mesh network for switching and resiliency in SoftRouter architecture
AssigneeAlcatel-Lucent USA Inc.
InventorFurquan Ahmed Ansari
Life of this patent
Estimating the term…
Abstract
Multiprotocol Label Switching (MPLS) Label Switched Path (LSP) tunnels provide protection and a switching mechanism between forwarding elements (FEs) and a control element (CE) for control and data traffic in a SoftRouter network.
Claims20
A method for routing, comprising:
- encapsulating, upon arrival at an ingress forwarding element (FE), a data packet with a label associated with a pre-established tunnel, the pre-established tunnel connecting the ingress FE to an egress FE wherein an FE without any external link would neither be ingress nor egress node;
- routing the data packet to the egress FE wherein upon failure of both the primary and secondary Label Switched Path (LSP), the elements may resort to the default layer 3 routing or layer 2 switching;
- and
- removing the label from the data packet at the egress FE.
1 more element
A tunnel-mesh network topology, comprising:
- a plurality of forwarding elements (FEs) connected in a topology, an inter-FE pre-established tunnel connecting any two FEs that each have at least one external link, each inter-FE pre-established tunnel being for data traffic wherein an FE without any external link can neither be ingress nor egress node;
- a control element (CE) having a tunnel for control traffic to each FE wherein upon failure of both the primary and secondary Label Switched Path (LSP), the elements may resort to the default layer 3 routing or layer 2 switching.
A computer readable medium storing instructions for performing a method for routing, the method comprising:
- encapsulating, upon arrival at an ingress forwarding element (FE), a data packet with a label associated with a pre-established tunnel, the pre-established tunnel connecting the ingress FE to an egress FE wherein an FE without any external link can neither be ingress nor egress node;
- routing the data packet to the egress FE wherein upon failure of both the primary and secondary Label Switched Path (LSP), the elements may resort to the default layer 3 routing or layer 2 switching;
- and
- removing the label from the data packet at the egress FE.
1 more element
Dependencies are inferred from the claim text.