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Method ad apparatus for Ethernet protection with local re-routing

A technology of Ethernet and routing, which is applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problems that the Ethernet monitoring needs to be improved, and the IP or MPLSFRR mechanism cannot be directly applied, etc.

Inactive Publication Date: 2011-02-16
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, these alternative technologies are different from Ethernet, and therefore, neither IP nor MPLS FRR mechanisms can be directly applied to Ethernet to eliminate the need for per-connection end-to-end monitoring and improve failure recovery time

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  • Method ad apparatus for Ethernet protection with local re-routing
  • Method ad apparatus for Ethernet protection with local re-routing
  • Method ad apparatus for Ethernet protection with local re-routing

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Embodiment Construction

[0043] Unlike previous protection switching schemes for Ethernet networks, embodiments of the present invention propose local reactions to faults at the fault location, thereby enabling rapid reactions. Four methods using the present invention are proposed for fast fault handling in Provider Backbone Bridging-Traffic Engineering (PBB-TE) Ethernet networks. These methods apply fast rerouting (FRR) to backup paths at the point of failure, and are therefore referred to herein as Ethernet Fast Rerouting (ETH-FRR) methods; references to ETH-FRR should be construed as references to embodiments of the present invention . Reactions to faults can be very fast due to the redirection at the fault location. Redirect affected traffic to a predefined backup, so computing at any time does not slow down reaction to failures.

[0044] The first two of the four embodiments apply simple redirection to another path towards the destination; the other two of the four embodiments use tunneling to ...

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Abstract

A method is provided for use at a first node of a network. The first node (B) has an input path for receiving Ethernet frames destined for a second node of the network. The first node (B) also has a first output (working) path for forwarding the received Ethernet frames towards the second node. A failure along the first output (working) path is detected at the first node. Following such failure detection, the received Ethernet frames are caused, at the first node, to be re-routed along a second output (backup) path, different to the first output (working) path, towards the second node. The re-routing is performed by using (e.g. referring to and / or changing) respective indications (VLAN1) applied to the Ethernet frames to distinguish those Ethernet frames to be forwarded along the first output (working) path from those Ethernet frames to be forwarded along the second output (backup) path.

Description

technical field [0001] The present invention relates to methods and devices for Ethernet rerouting. Background technique [0002] Today's Ethernet forwarding relies on Rapid Spanning Tree Protocol (RSTP) and Multiple Spanning Tree Protocol (MSTP), which control forwarding by controlling the active topology. Automatically learn MAC addresses based on frames sent on the active topology. RSTP and MSTP are also the main failure handling principles because they dynamically reconfigure the active topology after a failure. [0003] IEEE is working on a standardization effort to provide a new control for Ethernet networks called 802.1Qay Provider Backbone Bridge-Traffic Engineering (PBB-TE) [802.1Qay-Provider Backbone Bridge Traffic Engineering]. In PBB-TE, RSTP and MSTP are not used; instead, the forwarding is controlled through the configuration of the MAC address (that is, explicitly establishing a forwarding path to the destination). That is, no dynamic MAC address learning i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L45/28
CPCH04L12/4645H04L29/12349H04L45/28H04L61/2507H04L45/02H04L45/66H04L45/22H04L2212/0025H04L2212/00H04L61/2503
Inventor 亚诺什·福尔考什乔鲍·安陶尔奥蒂洛·陶卡奇
Owner TELEFON AB LM ERICSSON (PUBL)