Path diversity for customer-to-customer traffic
First Claim
1. A method, comprising:
- sending advertisements from a plurality of egress provider edge devices (PEs) to a plurality of ingress PEs for one or more address prefixes of a first multi-homed customer network that desires path diversity through a provider network to a second customer network;
receiving the plurality of advertisements at a first ingress PE;
determining at the first ingress PE whether at least a second ingress PE is multi-homed with the first ingress PE to the second customer network;
computing, in response at the first ingress PE, a plurality of diverse paths within the provider network from at least the first and second multi-homed ingress PEs to a corresponding egress PE of the plurality of egress PEs;
determining whether a plurality of diverse paths exist;
establishing a first tunnel from the first ingress PE to a first egress PE of the plurality of egress PEs in response to existence of a plurality of diverse paths; and
establishing a second tunnel from the second ingress PE to a second egress PE of the plurality of egress PEs that is diverse from the first tunnel.
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Accused Products
Abstract
In one embodiment, egress provider edge devices (PEs) send advertisements to ingress PEs for address prefixes of a first multi-homed customer network that desires path diversity through a service provider network to a second customer network. A first ingress PE receives the advertisements, and determines whether a second ingress PE is multi-homed with the first ingress PE to the second customer network. If so, the first ingress PE computes a plurality of diverse paths within the service provider network from the first and second multi-homed ingress PEs to a corresponding egress PE. If a plurality of diverse paths exists, the first ingress PE employs one of those paths to establish a first tunnel from itself to a first egress PE, and the second ingress PE employs another of the paths to establish a second tunnel from itself to a second egress PE that is diverse from the first tunnel.
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Citations
20 Claims
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1. A method, comprising:
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sending advertisements from a plurality of egress provider edge devices (PEs) to a plurality of ingress PEs for one or more address prefixes of a first multi-homed customer network that desires path diversity through a provider network to a second customer network; receiving the plurality of advertisements at a first ingress PE; determining at the first ingress PE whether at least a second ingress PE is multi-homed with the first ingress PE to the second customer network; computing, in response at the first ingress PE, a plurality of diverse paths within the provider network from at least the first and second multi-homed ingress PEs to a corresponding egress PE of the plurality of egress PEs; determining whether a plurality of diverse paths exist; establishing a first tunnel from the first ingress PE to a first egress PE of the plurality of egress PEs in response to existence of a plurality of diverse paths; and establishing a second tunnel from the second ingress PE to a second egress PE of the plurality of egress PEs that is diverse from the first tunnel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A node, comprising:
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one or more network interfaces adapted to provide an ingress to a provider network for a second customer network; one or more processors coupled to the network interfaces and adapted to execute one or more processes; and a memory adapted to store a path diversity process executable by each processor, the path diversity processes when executed adapted to;
i) receive advertisements from a plurality of egress provider edge devices (PEs) for one or more address prefixes of a first multi-homed customer network that desire path diversity through the provider network to the second customer network;
ii) determine whether the second customer network is multi-homed with a second ingress PE;
iii) compute, in response, a plurality of diverse paths within the provider network from at least the node and the second multi-homed ingress PE to a corresponding egress PE of the plurality of egress PEs;
iv) determine whether a plurality of diverse paths exist;
v) establish a first tunnel from the node to a first egress PE of the plurality of egress PEs in response to existence a plurality of diverse paths; and
vi) request that the second ingress PE establish a second tunnel from the second ingress PE to the second egress PE that is diverse from the first tunnel.
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20. An system, comprising:
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a plurality of egress provider edge devices (PEs) adapted to send advertisements for one or more address prefixes of a first multi-homed customer network that desire path diversity through a provider network to a second customer network; a first ingress PE adapted to i) receive the plurality of advertisements, ii) determine whether at least a second ingress PE is multi-homed with the first ingress PE to the second customer network, iii) compute, in response, a plurality of diverse paths within the provider network from at least the first and second multi-homed ingress PEs to a corresponding egress PE of the plurality of egress PEs, iv) determine whether a plurality of diverse paths exist, and v) establish a first tunnel from the first ingress PE to a first egress PE of the plurality of egress PEs in response to existence a plurality of diverse paths; and a second ingress PE adapted to establish a second tunnel from the second ingress PE to a second egress PE of the plurality of egress PEs that is diverse from the first tunnel.
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Specification