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An OAM label switched path for fast reroute of protected label switched paths

A label-switched path, protected technology, applied in the field of packet-based computer networks, can solve the problem of adverse performance effects

Inactive Publication Date: 2013-10-23
JUMIPER NETWORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These large convergence times can adversely affect the performance of applications that often rely on RSVP-TE and are extremely sensitive to traffic loss, such as Voice over Internet Protocol (VoIP) and multimedia applications

Method used

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  • An OAM label switched path for fast reroute of protected label switched paths
  • An OAM label switched path for fast reroute of protected label switched paths
  • An OAM label switched path for fast reroute of protected label switched paths

Examples

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Embodiment Construction

[0022] figure 1 is a block diagram illustrating example system 10 in which network devices 12A-12F ("network devices 12") of network 14 are configured to forward network traffic (eg, network packets) in accordance with techniques of this disclosure. exist figure 1 In the example shown, network devices 12A and 12E are edge devices of network 14 . In some examples, network 14 may be managed by a network service provider and provides connectivity to customer networks 19A-19C ("customer networks 19"). Edge network devices 12A and 12E are coupled via access links to customer edge (CE) network devices 18A-18C of customer network 19 ("CE network devices 18"). Edge network devices 12A and 12E communicate with CE network device 18 to enable customer network 19 to access network 14 . Network device 12 and CE network device 18 may be routers, devices including routing functionality, or other types of network devices.

[0023] Each of customer networks 19 may be an enterprise site net...

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Abstract

In response to receiving a reply message for reserving bandwidth along a primary path for a first label switched path (LSP) for carrying data traffic from an ingress network device to an egress network device, a point of local repair (PLR) network device establishes a second LSP from the PLR to a merge point (MP) network device along a subset of the primary path. The second LSP is dedicated to carrying operations, administration and management (OAM) messages to verify connectivity of the subset of the primary path, and is not used for sending data traffic. The PLR sends an OAM message to verify connectivity of at least one protected resource along the subset of the primary path to a next hop along the second LSP, wherein the OAM message is encapsulated by a second label associated with the second LSP.

Description

[0001] References to related applications [0002] This application claims the benefit of US Patent Application Serial No. 13 / 431,717, filed March 27, 2012, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to packet-based computer networks, and more particularly, to forwarding packets within a computer network. Background technique [0004] Routing devices within a network, often referred to as routers, maintain routing information describing available routes through the network. Once an incoming packet is received, the router examines the information in the packet and forwards the packet according to the routing information. To maintain an accurate representation of the network, routers exchange routing information according to one or more defined routing protocols, such as the Border Gateway Protocol (BGP). [0005] Multiprotocol Label Switching (MPLS) is a mechanism for engineering traffic patterns...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/723H04L45/24H04L45/28H04L45/50
CPCH04L12/4633H04L45/50H04L12/56H04L45/28H04L45/00H04L45/24H04L41/344
Inventor 桑托什·帕拉加蒂·科特拉巴萨帕维卡斯·海吉普拉尚特·辛格
Owner JUMIPER NETWORKS INC
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