System and methods for network reachability detection

Abstract

In an autonomous system (AS) that is familiar with LSPs, such as an MPLS VPN environment, a method used by ASBRs to identify the originating node or router that maintains the originating node and subsequent ASs on the path to the pinged node. The ID of the successor node of . The identification of the transmission node is stored in the stack or other objects related to the ping request (ping), so that the stored identification is used by the ping node as a set of return path routing information. Subsequent ASBRs along the path to the destination store their identities sequentially on the stack. Upon reaching the target (ping) node, the target node sends an acknowledgment or ping response using the identity of the first node in the stack.

Description

Background technique [0001] Virtual Private Networks (VPN) are becoming an increasingly popular mechanism for interconnecting multiple remote sites of a public entity, such as a company, university, government agency, or other enterprise. VPNs allow remote sites to interconnect as if they were co-located by providing messaging, security, and node addressing. This kind of VPN interconnects multiple subnets or local area networks (Local Area Networks, LAN) of enterprises, such as companies, universities or distributors. The subnets are connected to each other via private or public access networks such as the Internet, intranet, VPN, etc. [0002] This subnetwork interconnection is often referred to as the core network, which includes service providers with high-speed backbone routers and backbones. Each subnet and core network has access points called edge routers through which traffic flows in and out of the network. The core network has ingress points controlled by nodes kn...

AI Technical Summary

Problems solved by technology

This routing capability is usually not available in traditional IP traffic

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