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Local repair for underlay failure using prefix independent convergence

A tunnel endpoint and overlay network technology, applied in the field of computer networks, can solve problems such as service degradation, interruption of cloud-based service delivery, and failure to operate normally

Active Publication Date: 2021-12-07
JUMIPER NETWORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Loss of communication between the SDN controller and the virtual routers of the compute nodes can result in degraded or non-functional cloud-based services within the data center environment
Similarly, the loss of communication between the SDN controller and the SDN gateway may also interrupt the delivery of cloud-based services

Method used

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  • Local repair for underlay failure using prefix independent convergence
  • Local repair for underlay failure using prefix independent convergence
  • Local repair for underlay failure using prefix independent convergence

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0198] Example 1. A method comprising: determining, by a software-defined networking (SDN) controller managing an overlay network, a next step for a corresponding overlay network route for a destination in the underlay network based on whether the underlay network route is stored for the destination in the underlay network whether the hop is reachable by the SDN controller, the underlying network route comprises a route advertised by a node in an Internet Protocol (IP) structure of the underlying network; and in response to determining that the next hop for the overlay network route is unreachable, avoiding The controller advertises overlay network routes and withdraws overlay network routes from any network peers that previously advertised overlay network routes to it.

example 2

[0199] Example 2. The method according to example 1, wherein determining whether the next hop for the corresponding overlay route is reachable by the SDN controller comprises: determining whether the underlying route is stored in underlying routing information maintained by the SDN controller, wherein the underlying route The information stores the routes advertised to the SDN controller by the IP structure of the underlying network.

example 3

[0200] Example 3. The method of example 1, wherein the nodes in the IP fabric comprise spine switches, the method further comprising: receiving, by the SDN controller via a Border Gateway Protocol session between the SDN controller and the spine switch, the active A plurality of underlay network routes for tunnel endpoints, wherein the underlay network route includes an underlay network route of the plurality of underlay network routes, wherein the active tunnel endpoint includes a session based on a failure detection protocol between the active tunnel endpoint and a leaf node of the IP fabric Tunnel endpoints indicated as reachable.

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PUM

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Abstract

The embodiment of the invention relates to local repair for underlay failure using prefix independent convergence, and describes techniques for improving speed of network convergence after node failure. In one example, a method includes storing, by a virtual router agent of a compute node managed by a Software Defined Networking (SDN) controller, a forwarding information data structure with a shared liveness vector orthogonal to the forwarding path to indicate a liveness state of a plurality of overlay network tunnel endpoint next hops, wherein the shared liveness vector is shared by each of a plurality of members for a plurality of composite next hops that share a common list of the plurality of overlay network tunnel endpoint next hops; and in response to determining, by the virtual router agent, that the orthogonal liveness vector indicates that each of the plurality of overlay network tunnel endpoint next hops are reachable, distributing network traffic to one or more of the plurality of overlay network tunnel endpoint next hops.

Description

technical field [0001] The present disclosure relates to computer networking, and more particularly to forwarding packets within a virtual network. Background technique [0002] In a typical cloud data center environment, there are a large number of interconnected servers that provide computing (e.g., computing nodes) and / or storage capacity to run various applications. For example, data centers include facilities that host applications and services for customers of the data center. For example, a data center hosts all infrastructure equipment such as networking and storage systems, redundant power supplies, and environmental controls. In a typical data center, clusters of storage systems and application servers are interconnected via a high-speed switching fabric provided by one or more layers of physical network switches and routers. More complex data centers provide subscriber support equipment located in various physical colocation facilities for infrastructures spread...

Claims

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Application Information

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IPC IPC(8): H04L12/703H04L12/743H04L12/46H04L45/02H04L45/24H04L45/28H04L45/74
CPCH04L45/28H04L45/7453H04L12/4641H04L12/4633H04L45/02H04L45/22H04L45/64H04L45/24H04L45/54H04L45/76H04L47/125
Inventor A·苏亚纳拉亚纳R·罗伯茨
Owner JUMIPER NETWORKS INC
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