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Path diversity for customer-to-customer traffic

  • US 20080123651A1
  • Filed: 11/27/2006
  • Published: 05/29/2008
  • Est. Priority Date: 11/27/2006
  • Status: Active Grant
First Claim
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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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