CN100464519C - Management method for binding chain circuit state - Google Patents

Management method for binding chain circuit state Download PDF

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Publication number
CN100464519C
CN100464519C CNB2005100985998A CN200510098599A CN100464519C CN 100464519 C CN100464519 C CN 100464519C CN B2005100985998 A CNB2005100985998 A CN B2005100985998A CN 200510098599 A CN200510098599 A CN 200510098599A CN 100464519 C CN100464519 C CN 100464519C
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China
Prior art keywords
link
notification message
state
bundle
pwe3
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CNB2005100985998A
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Chinese (zh)
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CN1929392A (en
Inventor
子康
刘珺
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CNB2005100985998A priority Critical patent/CN100464519C/en
Priority to PCT/CN2006/001093 priority patent/WO2007028295A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

This invention provides one management method of binding linkage status, which comprises the following steps: sending linkage status information to PWE3 business and informing linkage status. This invention method can realize PWE3 business two ends binding linkage and timely informing with status information.

Description

The management method of binding chain circuit state
Technical field
The present invention relates to network communication field, relate in particular to a kind of management method of binding chain circuit state.
Background technology
PWE3 (Pseudo Wire Emulation Edge-to-Edge, the pseudo wire emulation of edge-to-edge) be a kind of in PSN (packet switching network) technology of professional essential characteristic such as emulation ATM (asynchronous transfer mode), frame relay, Ethernet, low speed TDM (time-division multiplex technology) circuit and SONET/SDH (synchronous optical network/synchronous digital hierarchy).
PWE3 utilizes the PSN network that traditional Internet resources (ATM/FR/LAN etc.) are communicated with; the emulation of traditional business is provided on the PSN network; when the legacy network business is passed through the PSN network; this legacy network business of emulation to the utmost; the terminal use is experienced less than otherness, and PWE3 can protect the existing investment of user and operator in Network integration and construction.
The repeating process schematic diagram of the data flow of PWE3 business as shown in Figure 1, in Fig. 1, CE (customer edge) 1 and CE2 interconnect by PWE3, the repeating process of the data flow of the PWE3 business from CE1 to CE2 is: go up by AC (CE being linked into physical circuit or the virtual circuit of PE) from CE1 receiving subscriber data message at PE1 (Provider Edge equipment), then, PE1 issues the PE2 of CE2 end by PW (virtual circuit that connects PE).Under the situation of multi-hop, might pass through a plurality of PE in the middle of PE1 and the PE2, PE2 will be transmitted to CE2 by AC from the message that PW receives again.
In the repeating process of above-mentioned data flow, be the quality interconnection between the assurance equipment, on AC, adopt multilink bundling usually, can also provide higher bandwidth like this.
On AC, adopted multilink bundling, and by after the AC interconnection of PWE3 with two ends, after certain link in the bundle link of an end AC broke down, the CE of this end can perceive, but the CE of the other end can not perceive.Therefore, the CE of the other end will be still sends data with the bandwidth of original bundle link, after the PE that these data traffics will be transferred to the link that breaks down goes up, just can be dropped because of AC bandwidth deficiency, cause the waste of PSN bandwidth.
Summary of the invention
The purpose of this invention is to provide a kind of management method of binding chain circuit state, thereby can be implemented between the PE of two ends bundle link of PWE3 business the state information of announcement bundle link in time.
The objective of the invention is to be achieved through the following technical solutions:
A kind of management method of binding chain circuit state comprises step:
A, on the Provider Edge equipment PE of the bundle link of the pseudo wire emulation PWE3 of edge-to-edge business structure Link State notification message;
B, between the PE of the bundle link of described PWE3 business, send described Link State notification message, announce the Link State of described bundle link.
Described Link State notification message comprises:
The quantity information of the normal condition link in the bundle link and the available bandwidth information of bundle link.
Described steps A specifically comprises:
In the notification message of the mark distribution LDP agreement that realizes the PWE3 business, place in circuit AC sublink Status Type length value TLV is set, and with this notification message as the Link State notification message, comprise quantity, bandwidth unit and the bandwidth of normal condition link among the described TLV.
Described steps A specifically comprises:
Quantity, bandwidth unit and the bandwidth of normal condition link are set among the PW state TLV of the virtual circuit PW between the PE of the bundle link of PWE3 business, construct described Link State notification message according to this TLV.
Described step B specifically comprises:
When link failure occurring in the end bundle link of PWE3 business, the opposite end PE of the PE of this bundle link in described PWE3 business sends described Link State notification message, announces this link failure information.
Described step B also comprises:
Opposite end PE in the described PWE3 business abandons the message that exceeds bandwidth according to the message that receives; Or send congested indication to coupled customer edge.
As seen from the above technical solution provided by the invention, the present invention passes through structure and transmission Link State notification message on the PE of the bundle link of PWE3 business, when an end link that is implemented in the bundle link by PWE3 interconnection breaks down, the PE of other end bundle link can in time be known this failure condition, can in time carry out the processing that flow suppresses, avoid the waste of PSN bandwidth, reduce the quantity that flow retransmits between the CE.
Description of drawings
Fig. 1 is the repeating process schematic diagram of the data flow of PWE3 business;
Fig. 2 is the process chart of the method for the invention.
Embodiment
The invention provides a kind of management method of binding chain circuit state, core of the present invention is: the related protocol between the PE of the bundle link of PWE3 business is expanded, utilize the agreement after expanding, between the PE of two ends bundle link, send the Link State notification message, the state of announcement bundle link.
Describe the present invention in detail below in conjunction with accompanying drawing, the handling process of the method for the invention comprises the steps: as shown in Figure 2
Step 2-1, on the PE of the bundle link of PWE3 business structure Link State notification message.
When after having adopted bundle link on the AC of PWE3 business, the present invention is structure Link State notification message on the PE of the bundle link of PWE3 business at first.
Construct the agreement that above-mentioned Link State notification message moves between can the PE based on the bundle link of PWE3 business.
Such as, when the agreement that realizes the PWE3 business is LDP (mark distribution) agreement, an AC sublink TLV (Status Type length value) can be set in the notification message of this LDP agreement, the quantity, bandwidth unit and the bandwidth that comprise the normal condition link among this TLV, and with this notification message as the Link State notification message.
The form of the notification message of above-mentioned AC sublink TLV is as follows:
Figure C200510098599D00071
Wherein, AC sublink state TLV field can be expressed as form:
AC sublink state TLV:{
AC sublink state
Length
The quantity of normal condition link
Bandwidth unit
Bandwidth
}
For constructing above-mentioned Link State notification message, the present invention can also be provided with quantity, bandwidth unit and the bandwidth of normal condition link in the PW state TLV of the PW between the PE of the bundle link of PWE3 business, then, construct described Link State notification message according to this TLV.The form of PW state TLV can be expressed as form:
Virtual circuit PW state TLV:{
The PW state
Length
State encoding
The quantity of normal condition link
Bandwidth unit
Bandwidth
}
Step 2-2, between the PE of the bundle link of PWE3 business, send described Link State notification message, the Link State of announcement bundle link.
After having constructed the Link State notification message on the PE of the bundle link of PWE3 business, the PE of two ends bundle link sends the Link State notification message between just can be mutually, announce the state of the link in its bundle link, realize the state of bundle link in time is notified to opposite end PE.
Such as, with Fig. 1 is example, when one or more link occurs fault in the bundle link on the AC between PE1 and the CE1, PE1 just sends above-mentioned Link State notification message to PE2, comprises the quantity of the normal link in the bundle link on the AC between PE1 and the CE1, the information of available bandwidth etc. in this notification message.
The PE of step 2-3, bundle link handles accordingly according to the message that receives.
After the PE of the bundle link of other end PWE3 business receives the related news of the announcement Link State that opposite end PE sends, just know the state information of opposite end bundle link, can handle accordingly.
Such as, with Fig. 1 is example, when one or more link occurs fault in the bundle link on the AC between PE1 and the CE1, after PE2 receives the Link State notification message of PE1 transmission, just know Link State and bandwidth situation in the bundle link on the AC between PE1 and the CE1, so can handle accordingly.As: abandon the message that exceeds bandwidth, or send congested indication etc. to CE2.Thereby can avoid the waste of PSN bandwidth, reduce the quantity that the flow between CE1 and the CE2 retransmits.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims (6)

1. the management method of a binding chain circuit state is characterized in that, comprises step:
A, on the Provider Edge equipment PE of the bundle link of the pseudo wire emulation PWE3 of edge-to-edge business structure Link State notification message;
B, between the PE of the bundle link of described PWE3 business, send described Link State notification message, announce the Link State of described bundle link.
2. according to the management method of the described binding chain circuit state of claim 1, it is characterized in that described Link State notification message comprises:
The quantity information of the normal condition link in the bundle link and the available bandwidth information of bundle link.
3. according to the management method of the described binding chain circuit state of claim 1, it is characterized in that described steps A specifically comprises:
In the notification message of the mark distribution LDP agreement that realizes the PWE3 business, place in circuit AC sublink Status Type length value TLV is set, and with this notification message as the Link State notification message, comprise quantity, bandwidth unit and the bandwidth of normal condition link among the described TLV.
4. according to the management method of the described binding chain circuit state of claim 1, it is characterized in that described steps A specifically comprises:
Quantity, bandwidth unit and the bandwidth of normal condition link are set among the PW state TLV of the virtual circuit PW between the PE of the bundle link of PWE3 business, construct described Link State notification message according to this TLV.
5. according to the management method of claim 2,3 or 4 described binding chain circuit states, it is characterized in that described step B specifically comprises:
When link failure occurring in the end bundle link of PWE3 business, the opposite end PE of the PE of this bundle link in described PWE3 business sends described Link State notification message, announces this link failure information.
6. according to the management method of the described binding chain circuit state of claim 5, it is characterized in that described step B also comprises:
Opposite end PE in the described PWE3 business abandons the message that exceeds bandwidth according to the message that receives; Or send congested indication to coupled customer edge.
CNB2005100985998A 2005-09-06 2005-09-06 Management method for binding chain circuit state Expired - Fee Related CN100464519C (en)

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CNB2005100985998A CN100464519C (en) 2005-09-06 2005-09-06 Management method for binding chain circuit state
PCT/CN2006/001093 WO2007028295A1 (en) 2005-09-06 2006-05-25 A management method for binding link state

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CN100471162C (en) * 2007-04-28 2009-03-18 杭州华三通信技术有限公司 Method for releasing and processing virtual circuit information and supplier edge device
CN101094114A (en) * 2007-06-15 2007-12-26 华为技术有限公司 Method and device for processing bound link
CN101227397B (en) * 2008-01-28 2012-06-27 华为技术有限公司 System, equipment and method for protecting link circuit
CN101505274B (en) * 2009-03-02 2011-07-06 华为技术有限公司 Method, system and apparatus for pseudowire status notification
CN102045239B (en) * 2009-10-13 2012-12-19 中兴通讯股份有限公司 Implementation method and device of point-to-multipoint pseudowire protective network
CN102045232A (en) * 2009-10-19 2011-05-04 中兴通讯股份有限公司 System and method for acquiring link information in bilayer VPN (Virtual Private Network)
CN102238138A (en) * 2010-04-23 2011-11-09 中兴通讯股份有限公司 Pseudo wire service processing method and system
CN103024826B (en) * 2012-12-10 2016-08-03 华为技术有限公司 The method of Bandwidth adjustment, equipment and system

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CN1625176A (en) * 2003-12-03 2005-06-08 华为技术有限公司 Realization method of edge to edge pseudo-line simulation protocol

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