Systems and methods for tunnel-free fast rerouting in internet protocol networks

摘要

An information handling system is provided. The information handling system includes a first, a second, a third, and a fourth network device. The first network device is coupled to the second network device and to the third network device, while the fourth network device is also coupled to the second and third network devices. At least the fourth network device has a plurality of interfaces and one or more processors in communication with the interfaces and a memory. At least one of the one or more processors is configured to disassociate a network address of the first network device from a first VRF instance and associate the network address of the first network device with a second VRF instance when a network failure associated with the first VRF instance is detected. Methods for rerouting traffic through the information handling system in response to a network event are also disclosed.

主权项

1. An information handling device comprising:
a plurality of interfaces; and a memory including a first routing table, the first routing table being associated with a first virtual routing and forwarding (VRF) instance, the first VRF instance providing a normal-condition path associated with a network address; and one or more processors in communication with the plurality of interfaces and the memory, wherein the one or more processors are configured to: receive, from a network controller and prior to a network failure being detected, a reroute path associated with the network address and a policy-based routing rule indicating that the traffic corresponding to the network address should be associated with a second VRF instance, wherein the network controller is an OpenFlow controller and the reroute path and the policy-based routing rule are received according to an OpenFlow protocol; store the reroute path in the memory using a second routing table, the second routing table being associated with the second VRF instance; and disassociate the network address from the first VRF instance and associate the network address with the second VRF instance when the network failure is detected.