Label switched path reporting

A technology of label switching paths and paths, which is applied in the field of computer networks and can solve complex problems.

Active Publication Date: 2017-10-20
JUMIPER NETWORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, constraint-based path computation in large, multi-domain, multi-area, and/or multi-layer networks is complex and in some cases may require suffi

Method used

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  • Label switched path reporting
  • Label switched path reporting
  • Label switched path reporting

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0074] Example 1. A method comprising: receiving, by a first network device, an LSP path signaling message from a second network device, the first network device being not an ingress label edge router (LER) for a traffic engineered label switched path (TE LSP) , the LSP path signaling message includes a routing object having a first indication of a sub-path for at least one path of the TE LSP; generated by the first network device in response to the LSP path signaling message and based at least in part on the routing object comprising An LSP path report message for the second indication of the subpath of the at least one path of the TE LSP; and the LSP path report message is sent by the first network device to the path computation element (PCE) to notify the PCE of the at least one path of the TE LSP subpath.

example 2

[0075] Example 2. The method according to example 1, wherein the LSP path signaling message includes requesting the first network device to bind a label for the TE LSP and return the label to the second network device with a resource reservation protocol ( RSVP-TE) path message, and wherein the routing object includes one of an explicit routing object (ERO) and a recorded routing object (RRO).

example 3

[0076] Example 3. The method of example 1, wherein the LSP path signaling message includes a Resource Reservation Protocol (RSVP) Resv message, the Resv message includes a label bound by the second network device for the TE LSP, and wherein the routing object Contains one of an explicit routing object (ERO) and a recorded routing object (RRO).

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Abstract

The invention relates to label switched path reporting. Techniques are described for reporting, by non-ingress routers for traffic engineering label switched paths (TE LSPs) and to a path computation element, actual paths taken by the TE LSPs through the network. A first network device: receives, from a second network device, an LSP path signaling message that includes a route object having a first indication of at least a sub-path of a path for TE LSP through a network, wherein the first network device is not an ingress label edge router for the TE LSP; generates, in response to the LSP path signaling message and based at least in part on the route object, an LSP path report message that includes a second indication of the at least the sub-path of the path for the TE LSP; and sends, to a path computation element, the LSP path report message to notify the PCE.

Description

technical field [0001] The present invention relates to computer networks and, more particularly, to providing traffic engineering within a network. Background technique [0002] Routing devices (often referred to as routers) in a network maintain tables of routing information that describe available routes through the network. Network routers maintain routing information that describes available routes through the network. When a packet is received, a router examines the information within the packet and forwards the packet based on the routing information. In order to maintain an accurate representation of the network, routers exchange routing information according to one or more routing protocols, such as Interior Gateway Protocol (IGP) or Border Gateway Protocol (BGP). [0003] The term "link" is often used to refer to a connection between two devices on a network. A link can be a physical connection, such as copper wire, coaxial cable, any of a number of different fi...

Claims

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Application Information

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IPC IPC(8): H04L12/723H04L45/02H04L45/50H04L47/724
CPCH04L45/50H04L41/12H04L45/02H04L45/42H04L47/724
Inventor 库姆辛尼·瑞特纳辛哈姆
Owner JUMIPER NETWORKS INC
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