Ethernet OAM at intrmediate nodes in a PBT network

An intermediate node, Ethernet technology, applied in the field of Ethernet OAM, can solve the problem of unable to create, unable to create response frame and so on

Inactive Publication Date: 2009-09-16
NORTEL NETWORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, intermediate nodes may not be able to create frames on the reverse trunk that will be processed by other intermediate nodes as normal frames
Therefore, even if the intermediate node receives and processes the OAM message, the intermediate node cannot create an acknowledgment frame that can be transmitted on the reverse trunk 106b

Method used

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  • Ethernet OAM at intrmediate nodes in a PBT network
  • Ethernet OAM at intrmediate nodes in a PBT network
  • Ethernet OAM at intrmediate nodes in a PBT network

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Embodiment Construction

[0033] The following detailed description sets forth numerous specific details in order to provide a thorough understanding of the present invention. However, one skilled in the art will understand that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components, protocols, algorithms and circuits have not been described in detail so as not to obscure the present invention.

[0034] FIG. 1 shows a portion of an exemplary Ethernet network 100 in which network elements 102 are interconnected by links 104 . PBT trunks 106a, 106b may be established throughout Ethernet network 100 as described in greater detail in US patent application Ser. No. 10 / 818,685, entitled "Traffic Engineering in Frame-Based Carrier Networks," the contents of which Incorporated herein by reference.

[0035] The PBT trunk 106 is created to extend a route through the Ethernet network 100 by causing the forwarding state to be establis...

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Abstract

OAM may be implemented at an intermediate node on a PBT trunk in an Ethernet network by causing OAM frames to be addressed to the PBT trunk endpoint but causing the OAM frames to carry an indicia (Ether-type, OpCode, TLV value or combination of these and other fields) that the OAM frames are intended to be used for intermediate node OAM functions. The Ether-type, OpCode, and TLV values may be standardized values, or vendor specific values such as OpCode=51 or TLV=31 may be used. Addressing the OAM frames to the PBT trunk end point enables the OAM frames to follow the PBT trunk through the network. The OAM indicia signals to the intermediate nodes that the OAM frames are intended to be used to perform an intermediate node OAM function. The OAM frames may contain reverse trunk information to prevent the intermediate nodes from being required to store correlation between forward and reverse PBT trunks.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application is related to US Provisional Application No. 60 / 855,550, filed October 31, 2006, entitled "OAM For DifferentialForwarding in Address Based Networks," and requires Priority to the US Provisional Application, which is incorporated herein by reference. technical field [0003] The present invention relates to communication networks, and more particularly to a method and apparatus for implementing Ethernet OAM on intermediate nodes in a Provider Bridged Transport (PBT) network. Background technique [0004] A data communication network may include various routers, switches, bridges, hubs, and other network devices coupled and configured to communicate data with each other. These devices will be referred to herein as "network elements". Data is passed across a data communication network by employing one or more communication links between devices to communicate protocol data units, such as Internet Protoco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/28H04L69/40
CPCH04L41/0213H04L12/4641
Inventor D·莫汉C·蒙蒂P·罗马努斯D·曾M·陈
Owner NORTEL NETWORKS LTD
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