CN102487327B - Service switch method and device - Google Patents

Service switch method and device Download PDF

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Publication number
CN102487327B
CN102487327B CN201010568960.XA CN201010568960A CN102487327B CN 102487327 B CN102487327 B CN 102487327B CN 201010568960 A CN201010568960 A CN 201010568960A CN 102487327 B CN102487327 B CN 102487327B
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pseudo
line
tunnel
main
business
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CN102487327A (en
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宋新意
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2011/071876 priority patent/WO2012071831A1/en
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    • 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
    • H04L45/68—Pseudowire emulation, e.g. IETF WG PWE3
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements

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

Abstract

The invention discloses a service switch method and a device. The method comprises the following steps of: arranging a main tunnel and a protecting tunnel between head node equipment which is provided with pseudo-wire dual-return and tail node equipment which is not provided with pseudo-wire dual-return, and respectively configuring TMP MEG for the main tunnel and the protecting tunnel; uploading a service on the main tunnel; and when an alarm is detected on the main tunnel through the TMP MEG of the main tunnel, triggering the service to switch the service to the protecting tunnel. The effect of avoiding unnecessary pseudo-wire switch is achieved by the method and the device.

Description

Business switch method and device
Technical field
The present invention relates to the communications field, in particular to a kind of business switch method and device.
Background technology
In Computer Data Communication, especially in Deta bearer net, transmission negotiate marking commutation (Transmission Multi-Protocol Label Switching, referred to as TMPLS) Application comparison is extensive.Technological highlights mainly link protection and the Node Protection of TMPLS; wherein an important technology is protecting tunnel; there is a kind of mode to be linear end-to-end protection in protecting tunnel, that is, protect the whole path in tunnel; this scene needs (the T-MPLS tunnel, transmission negotiate marking commutation tunnel configuring TMPLS; that is, TMP) management entity group (Management Entity Group, referred to as MEG); that is, passage layers detects.Dispose pseudo-line (PW) dual homed business at this environment, generally all need transmission negotiate marking commutation passage (T-MPLS passage, that is, the TMC) MEG configuring TMPLS, that is, channel layer detects.When configuring a large amount of pseudo-line dual homed business, need the MEG resource for each pseudo-line service establishment TMC, because the MEG resource of equipment is very limited, this is restricted causing the pseudo-line service sum of equipment support.In addition, the detection of TMC MEG also needs occupied bandwidth, and when there is a large amount of TMC MEG and detecting, occupied bandwidth is more obvious.At present, TMPLS operation management maintain (Operation Administration and Maintenance, referred to as OAM) in standard, define alarm indication signal (Alarm IndicationSignal, referred to as AIS), namely, when service layer detect there is fault time, to maintaining end point (the Maintenance association End Point of this client layer, referred to as MEP) node transmission alarm notice, by automatic protection switching (Automatic Protect Switch, referred to as APS) this alarm of protocol processes notice, produce service layer Signal Fail (Server SignalFail, referred to as SSF) alarm, suppress the alarm that client layer detects simultaneously.
Can realize the switching of pseudo-line by above-mentioned technology, but there is following defect in this technology: first; protecting tunnel group may be there is in the tunnel of carrying pseudo-line, and according to above-mentioned technology, as long as the TMP in main tunnel detects fault; namely trigger ais alarm to notice, now, may not there is alarm in standby tunnel; if protecting tunnel group to be switched to standby tunnel; then pseudo-line does not have fault, like this, adopts above-mentioned technology; pseudo-line has responded this ais alarm and has noticed, thus there occurs unnecessary pseudo-line switching.The second, APS agreement needs the ais alarm calculating TMP to notice, and produces SSF alarm, and then triggers the switching of pseudo-line, and such processing logic is complicated, and performance of handoffs not high (not reaching 50ms), does not meet telecommunication service requirement.
Summary of the invention
Main purpose of the present invention is to provide a kind of business handover scheme, also carries out pseudo-line switching and problem that the unnecessary pseudo-line that produces switches at least to solve when protecting tunnel group is normal in above-mentioned correlation technique.
According to an aspect of the present invention, provide a kind of business switch method, comprise: main tunnel and protection tunnel are set between the head node equipment and the end-node equipment not configuring pseudo-line dual homed of the pseudo-line dual homed of configuration, and be respectively main tunnel and protection tunnel configuration TMPMEG; Transport service on the primary tunnel; When the TMP MEG in main tunnel is checked through alarm on the primary tunnel, trigger business is switched on protection tunnel.
According to a further aspect in the invention, provide a kind of business switching device shifter, comprise: module is set, for arranging main tunnel and protection tunnel between the head node equipment and the end-node equipment not configuring pseudo-line dual homed of the pseudo-line dual homed of configuration, and be respectively main tunnel and protection tunnel configuration TMP MEG; Transport module, for transport service on the primary tunnel; First trigger module, for when the TMP MEG in main tunnel is checked through alarm on the primary tunnel, trigger business is switched on protection tunnel.
Pass through the present invention; adopt the alarm status in monitoring tunnel; when main tunnel produces alarm; use the mode of protection tunneling traffic; solve protecting tunnel group normal time also carry out pseudo-line switching and problem that the unnecessary pseudo-line that produces switches, and then reach the effect avoiding unnecessary pseudo-line to switch.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the business switch method according to the embodiment of the present invention;
Fig. 2 is the schematic diagram of the TMPLS networking according to the embodiment of the present invention three;
Fig. 3 is the method schematic diagram switching the conversion between pseudo-line dual homed state in the real-time performance TMP alarm shown in Fig. 2 according to the embodiment of the present invention three;
Fig. 4 is the structured flowchart of the business switching device shifter according to the embodiment of the present invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Embodiment one
Embodiments provide a kind of business switch method, this changing method may be used for the switching of business between pseudo-line, and the business between the tunnel that can also be used for the pseudo-line with protecting tunnel group switches.Fig. 1 is the flow chart of the business switch method according to the embodiment of the present invention, as shown in Figure 1, comprising:
Step S102, arranges main tunnel and protection tunnel, and is respectively this main tunnel and this protection tunnel configuration TMP MEG between the head node equipment and the end-node equipment not configuring pseudo-line dual homed of the pseudo-line dual homed of configuration;
Step S104, transport service on this main tunnel;
Step S106, when the TMP MEG in this main tunnel is checked through alarm on the primary tunnel, trigger business is switched on protection tunnel.
In the present embodiment; the alarm status in monitoring tunnel; main tunnel and protection tunnel (also can be described as standby tunnel) form protecting tunnel group; when main tunnel produces alarm; use protection tunneling traffic, by this mode, when avoiding that in correlation technique, protecting tunnel group is normal; if the problem pseudo-line existing alarm and also carry out switching detected, thus avoid unnecessary pseudo-line and switch.It should be noted that, protection tunnel can make one or more tunnel, each tunnel is provided with TMP MEG.
In a preferred implementation of the embodiment of the present invention; after step s 106; if the TMP MEG in protection tunnel is checked through alarm on protection tunnel; then can illustrate that the pseudo-line of main tunnel and the carrying of protection tunnel is unavailable; at this moment, can on the trigger business main pseudo-line that is switched to the pseudo-line of protection tunnel carrying or standby pseudo-line.Wherein, when the pseudo-line protecting tunnel carrying is main pseudo-line, trigger business is switched on standby pseudo-line; When the pseudo-line protecting tunnel carrying is standby pseudo-line, trigger business is switched on main pseudo-line.
In another preferred implementation of the embodiment of the present invention; when the pseudo-line protecting tunnel carrying is standby pseudo-line; after trigger business is switched on main pseudo-line; if the TMP MEG in the main tunnel at standby pseudo-line place or protection tunnel detects that alarm disappears; then can report and alarm disappear information to APS protocol module; then, standby pseudo-line is switched to by APS protocol module trigger business.
In another preferred implementation of the embodiment of the present invention; triggering at APS protocol module switches to for after pseudo-line by business; if the TMP MEG in the main tunnel of main pseudo-line or protection tunnel detects that alarm disappears; then the information of report and alarm disappearance is to APS protocol module; then, trigger business is switched to main pseudo-line by APS protocol module.Wherein, APS protocol module, after the information receiving alarm disappearance, can wait a period of time to go out sending service again and switch to main pseudo-line.
Preferably; if main tunnel does not have corresponding protection tunnel, then, when the TMPMEG in main tunnel detects and is checked through alarm on the primary tunnel, can think that the pseudo-line that main tunnel carries is unavailable; now, on the business triggered on the main tunnel main pseudo-line that is switched to the pseudo-line of main tunnel carrying or standby pseudo-line.
Preferably, when the pseudo-line that main tunnel carries being provided with transmission negotiate marking commutation channel management group of entities TMC MEG, the testing result of TMC MEG is used to carry out pseudo-line switching, namely, the testing result of TMC MEG preferentially can be used to switch, and do not use the condition that the testing result of TMP MEG switches as pseudo-line.
Embodiment two
Present embodiments provide a kind of method that pseudo-line switches fast, the method comprises:
Steps A. set up TMPLS network, this network comprises at least three Provider Edges (Provider Edge, referred to as PE) equipment and some P equipment (Tag switching equipment).Wherein, a PE configures pseudo-line dual homed, and another two PE equipment configure the pseudo-line service of non-dual homed as the end-node of pseudo-line dual homed, and other P equipment are as the Tag switching equipment in tunnel.Configure difference configured tunneling technique and protecting tunnel group between the head node equipment of pseudo-line dual homed and the end-node equipment not configuring pseudo-line dual homed; all tunnels all configure TMP MEG; article two, pseudo-line does not configure TMC MEG; all TMP detect normal; there is not fault; so far, pseudo-line dual homed environmental structure forms, and business forwards on main pseudo-line.
Step B. configures on the equipment of pseudo-line dual homed, and the work tunnel TMP carried in the protecting tunnel group of main pseudo-line detects fault, triggers protecting tunnel group and switches.If in this condition, protection tunnel TMP also detects fault, then directly trigger pseudo-line dual homed and be switched to standby pseudo-line fast, this switching mode can reach 50ms performance of handoffs, and business forwards at standby pseudo-line.After pseudo-line dual homed switches, report TMP to breed alarm to APS protocol module, calculate breeding alarm status by APS agreement, and safeguard pseudo-line dual homed state.Wherein, breed alarm to refer to the alarm in tunnel to breed on pseudo-line.
Step C. is on the basis of step B, and the work tunnel TMP in the protecting tunnel group of the standby pseudo-line of carrying detects fault, triggers protecting tunnel group and switches.In this condition, if protection tunnel TMP also detects fault, then directly trigger the quick switchback of pseudo-line dual homed to main pseudo-line.After pseudo-line dual homed switches, report TMP to breed alarm to APS protocol module, calculate breeding alarm status by APS agreement, and safeguard pseudo-line dual homed state, now, because active/standby pseudo wires link has fault, so business is that forwarding is obstructed.
Step D. is on the basis of step C; arbitrary tunnel TMP in the protecting tunnel group of the standby pseudo-line of carrying detects failure vanishes; reporting TMP to breed alarm disappears to APS protocol module; breeding alarm status is calculated by APS agreement; the process of APS agreement be at once by pseudo-line dual homed switchback to standby pseudo-line; guarantee that flow normally forwards, now business forwards on standby pseudo-line.
Step e. on the basis of step D; arbitrary the tunnel TMP carried in the protecting tunnel group of main pseudo-line detects failure vanishes; then reporting TMP to breed alarm disappears to APS protocol module; breeding alarm status is calculated by APS agreement; and safeguard pseudo-line dual homed state; the process of APS agreement enters to recover to wait for (Wait To Restore; referred to as WTR) state; after waiting for a period of time by pseudo-line dual homed switchback on main pseudo-line; now; there is not fault in active/standby pseudo wires link, business forwards on main pseudo-line, got back to again the initial condition that steps A describes.
If step F. on pseudo-line, configure TMC MEG, then TMP breeds alarm disappearance, detects link whether there is fault by TMC MEG.
If the tunnel of step G. carrying pseudo-line does not configure protecting tunnel group, then TMP breeds the TMP alarm status that alarm status depends on wall scroll tunnel, instead of the TMP alarm status in protecting tunnel group two tunnels.
Embodiment three
Fig. 2 is the schematic diagram of the TMPLS network according to the embodiment of the present invention three, and Figure 2 shows that the networking scene that pseudo-line dual homed nested tunnels is protected, active/standby pseudo wires is all configured with protecting tunnel group.Main pseudo-lineman as tunnel path is: PE1-PE2, and main pseudo-line protection tunnel path is: PE1-P1-PE2; Standby pseudo-lineman as tunnel path is: PE1-PE3, and standby pseudo-line protection tunnel path is: PE1-P2-PE3.
Fig. 3 is the method schematic diagram switching the conversion between pseudo-line dual homed state in the real-time performance TMP alarm shown in Fig. 2 according to the embodiment of the present invention three, and as shown in Figure 3, the method comprises:
Step S001, configure the protection of pseudo-line dual homed nested tunnels, four tunnels all configure TMPMEG, and active/standby pseudo wires does not configure TMC MEG, and under initial condition, business forwards on main pseudo-line.
Step S002, configures on the equipment of pseudo-line dual homed, and work tunnel (PE1-PE2 link) TMP carried in the protecting tunnel group of main pseudo-line detects fault, triggers protecting tunnel group and switches.In this condition, if protection tunnel (PE1-P1-PE2 link) TMP also detects fault, then directly trigger pseudo-line dual homed and be switched to standby pseudo-line fast to reach 50ms performance of handoffs, business forwards at standby pseudo-line.After pseudo-line dual homed switches, report TMP to breed alarm to APS protocol module, calculate breeding alarm status by APS agreement, and safeguard pseudo-line dual homed state.
Step S003, on the basis of step S002, work tunnel (PE1-PE3 link) TMP in the protecting tunnel group of the standby pseudo-line of carrying detects fault, triggers protecting tunnel group and switches.In this condition, if protection tunnel (PE1-P2-PE3 link) TMP also detects fault, then directly trigger the quick switchback of pseudo-line dual homed to main pseudo-line.After pseudo-line dual homed switches, report TMP to breed alarm to APS protocol module, calculate breeding alarm status by APS agreement, and safeguard pseudo-line dual homed state, now because active/standby pseudo wires link has fault, so business is that forwarding is obstructed.
Step S004; on the basis of step S003; if arbitrary tunnel TMP in the protecting tunnel group of the standby pseudo-line of carrying detects failure vanishes; then reporting TMP to breed alarm disappears to APS protocol module; breeding alarm status is calculated by APS agreement; the process of current APS agreement be at once by pseudo-line dual homed switchback to standby pseudo-line, guarantee that flow normally forwards, now business is forwarding on standby pseudo-line.
Step S005; on the basis of step S004; if arbitrary the tunnel TMP carried in the protecting tunnel group of main pseudo-line detects failure vanishes; then reporting TMP to breed alarm disappears to APS protocol module; breeding alarm status is calculated by APS agreement; and safeguard pseudo-line dual homed state; the process of current APS agreement enters WTR state; after waiting for a period of time by pseudo-line dual homed switchback on main pseudo-line; now there is not fault in active/standby pseudo wires link; business forwards on main pseudo-line, has got back to again the initial condition that step S001 describes.
Step S006, if configure TMC MEG on pseudo-line, so TMP breeds alarm disappearance, detects link whether there is fault by TMC MEG.
Step S007, if the tunnel of carrying pseudo-line does not configure protecting tunnel group, so TMP breeds the TMP alarm status that alarm status depends on wall scroll tunnel, instead of the TMP alarm status in protecting tunnel group two tunnels.
Embodiment four
The embodiment of the present invention additionally provides a kind of business switching device shifter, and this device is used for realizing said method.Fig. 4 is the structured flowchart of the business switching device shifter according to the embodiment of the present invention, and as shown in Figure 4, this device comprises:
Module 42 is set, for arranging main tunnel and protection tunnel between the head node equipment and the end-node equipment not configuring pseudo-line dual homed of the pseudo-line dual homed of configuration, and be respectively main tunnel and protection tunnel configuration transmission negotiate marking commutation tunnel management group of entities TMP MEG; Transport module 44, is coupled to and arranges module 42, for transport service on the primary tunnel; First trigger module 46, is coupled to transport module 44, and for when the TMP MEG in main tunnel is checked through alarm on the primary tunnel, trigger business is switched on protection tunnel.
In a preferred embodiment of the embodiment of the present invention; said apparatus can also comprise: the second trigger module; for when protecting the TMP MEG in tunnel to be checked through alarm on protection tunnel, trigger business is switched to be protected on the main pseudo-line of the pseudo-line of tunnel carrying or standby pseudo-line.Wherein,
When the pseudo-line protecting tunnel carrying is main pseudo-line, the second trigger module is switched to standby pseudo-line for trigger business; When the pseudo-line protecting tunnel carrying is standby pseudo-line, the second trigger module is switched to main pseudo-line for trigger business.
In another preferred embodiment of the embodiment of the present invention; said apparatus can also comprise: the first reporting module; for when the main tunnel at standby pseudo-line place or the TMPMEG in protection tunnel detect that alarm disappears; the information that report and alarm disappears to automatic protection switching APS protocol module, thus makes APS protocol module trigger business switch to standby pseudo-line.
In another preferred embodiment of the embodiment of the present invention; said apparatus can also comprise: the second reporting module; for when the TMP MEG in the main tunnel of main pseudo-line or protection tunnel detects that alarm disappears; the information that report and alarm disappears to APS protocol module, thus makes APS protocol module trigger business switch to main pseudo-line.
Preferably, when main tunnel does not have corresponding protection tunnel, if the TMPMEG in main tunnel detects be checked through alarm on the primary tunnel, then on the main pseudo-line that the business triggered on main tunnel is switched to the pseudo-line of main tunnel carrying or standby pseudo-line.
Preferably, when the pseudo-line that main tunnel carries being provided with transmission negotiate marking commutation channel management group of entities TMC MEG, said apparatus uses the testing result of TMC MEG to carry out pseudo-line switching.
In sum, the embodiment of the present invention adopts the alarm status in monitoring tunnel, when main tunnel produces alarm, uses the mode of protection tunneling traffic, reaches the effect avoiding unnecessary pseudo-line to switch.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a business switch method, is characterized in that, comprising:
Main tunnel and protection tunnel are set between the head node equipment and the end-node equipment not configuring pseudo-line dual homed of the pseudo-line dual homed of configuration, and are respectively described main tunnel and described protection tunnel configuration transmission negotiate marking commutation tunnel management group of entities TMP MEG;
Transport service on described main tunnel;
When the TMP MEG in described main tunnel is checked through alarm on described main tunnel, triggers described business and be switched on described protection tunnel.
2. method according to claim 1, is characterized in that, after triggering the business on described main tunnel and being switched on described protection tunnel, described method also comprises:
When the TMP MEG in described protection tunnel is checked through alarm on described protection tunnel, trigger on main pseudo-line or standby pseudo-line that described business is switched to the pseudo-line of described protection tunnel carrying.
3. method according to claim 2, is characterized in that, triggers described business and is switched to the main pseudo-line of the pseudo-line of described protection tunnel carrying or comprises on pseudo-line:
When the pseudo-line of described protection tunnel carrying is main pseudo-line, triggers described business and be switched on described standby pseudo-line;
When the pseudo-line of described protection tunnel carrying is standby pseudo-line, triggers described business and be switched on described main pseudo-line.
4. method according to claim 3, is characterized in that, when the pseudo-line of described protection tunnel carrying is standby pseudo-line, after the described business of triggering is switched on described main pseudo-line, described method also comprises:
The main tunnel at described standby pseudo-line place or the TMP MEG in protection tunnel detect that alarm disappears;
The information that report and alarm disappears is to automatic protection switching APS protocol module;
Described APS protocol module triggers described business and switches to described standby pseudo-line.
5. method according to claim 4, is characterized in that, after business is switched to described standby pseudo-line by described APS protocol module triggering, described method also comprises:
The main tunnel of described main pseudo-line or the TMP MEG in protection tunnel detect that alarm disappears;
The information that report and alarm disappears is to described APS protocol module;
Described APS protocol module triggers described business and switches to described main pseudo-line.
6. method according to any one of claim 1 to 5; it is characterized in that; when described main tunnel does not have corresponding protection tunnel; if the TMPMEG in described main tunnel detects be checked through alarm on described main tunnel, then on the main pseudo-line that the business triggered on described main tunnel is switched to the pseudo-line of described main tunnel carrying or standby pseudo-line.
7. method according to any one of claim 1 to 5, is characterized in that, when being provided with transmission negotiate marking commutation channel management group of entities TMC MEG on the pseudo-line of described main tunnel carrying, uses the testing result of described TMC MEG to carry out pseudo-line switching.
8. a business switching device shifter, is characterized in that, comprising:
Module is set, for arranging main tunnel and protection tunnel between the head node equipment and the end-node equipment not configuring pseudo-line dual homed of the pseudo-line dual homed of configuration, and be respectively described main tunnel and described protection tunnel configuration transmission negotiate marking commutation tunnel management group of entities TMP MEG;
Transport module, for transport service on described main tunnel;
First trigger module, when the TMP MEG in described main tunnel is checked through alarm on described main tunnel, triggers described business and is switched on described protection tunnel.
9. device according to claim 8, is characterized in that, described device also comprises:
Second trigger module, for when the TMP MEG in described protection tunnel is checked through alarm on described protection tunnel, triggers on main pseudo-line or standby pseudo-line that described business is switched to the pseudo-line of described protection tunnel carrying.
10. device according to claim 9, is characterized in that,
When the pseudo-line of described protection tunnel carrying is main pseudo-line, described second trigger module is switched to described standby pseudo-line for triggering described business;
When the pseudo-line of described protection tunnel carrying is standby pseudo-line, described second trigger module is switched to described main pseudo-line for triggering described business.
CN201010568960.XA 2010-12-01 2010-12-01 Service switch method and device Active CN102487327B (en)

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CN105656776B (en) * 2014-12-01 2020-03-27 中兴通讯股份有限公司 Pseudo wire dual-homing protection switching system, method and device
CN113726645A (en) * 2021-08-06 2021-11-30 中盈优创资讯科技有限公司 STN network link-supplementing service switching method and device

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