CN102325037B - A kind of changing method of pseudo-line dual homed network, system and dual-homed Provider Equipment - Google Patents
A kind of changing method of pseudo-line dual homed network, system and dual-homed Provider Equipment Download PDFInfo
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- CN102325037B CN102325037B CN201110137249.3A CN201110137249A CN102325037B CN 102325037 B CN102325037 B CN 102325037B CN 201110137249 A CN201110137249 A CN 201110137249A CN 102325037 B CN102325037 B CN 102325037B
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- 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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Abstract
The invention provides a kind of changing method of pseudo-line dual homed network, system and dual-homed Provider Equipment, the handoff technique in order to solve existing pseudo-line dual homed network cannot ensure the problem of network performance of handoffs.The method comprises: when primary link break down, ustomer premises access equipment by flow switch to reserve link time, the dual-homed Provider Equipment of master in primary link is enabled centre and is switched pseudo-line, and it is the pseudo-line set up between for subsequent use dual-homed Provider Equipment in the dual-homed Provider Equipment of described master and reserve link that pseudo-line is switched in described centre; Flow switch to described centre is switched pseudo-line and is transmitted by the dual-homed Provider Equipment of described master.This technical scheme switches pseudo-line by newly-increased centre, improves network performance of handoffs, improves switchback performance, ensure that the stability of network, be supplied to the service that client is more perfect.
Description
Technical field
The present invention relates to data network communications technical field, particularly a kind of changing method of pseudo-line dual homed network, system and dual-homed Provider Equipment.
Background technology
In order to meet the trend of metropolitan area network business transition and the integration of three networks, Virtual network operator tends to adopt the grouping conveying network of efficient and low cost to realize multiple service supporting, network service is flexibly provided, improve network resource utilization, reduce network design complexity, strengthen network service flexibility, for it brings more economic benefit.
Layer 2 virtual private network L2VPN (Layer2VirtualPrivateNetwork) is the technology relying on ISP and Internet Service Provider to set up private data communication network in the public network.VPLS VPLS (VirtualPrivateLanService) and Virtual Private Line service VLL (VirtualLeasedLine) two kinds of business models can be divided into, the former forwards based on ether business, supports point-to-multipoint network design; The latter is Virtual Private Line service, based on ether, ATM, TDM, HDLC, FR, PPP etc. two layer service emulation, only support the network design of point-to-point.
Due to the high reliability demand of carrier ethernet; operator pays much attention to business convergence speed during network failure; this just needs more to focus on failure response and pretection switch ability when network design, PWOAMMessageMapping and the PWredundancy technology that IETF organizes PWE3 working group to propose is considered just for this reason.
PWOAMMessageMapping (draft-ietf-pwe3-oam-msg-map-12) is a kind of pseudo-lines fault annunciation techniques.When point-to-point artificial service, support the Fault Mapping of AC (place in circuit) and PW (pseudo-line), namely when AC breaks down, realize the interlock with PW layer OAM (OperationAdministration & Maintenance), by PWE3 protocol massages by fault notification to far-end, far-end can know that this service path breaks down, carries out corresponding subsequent treatment fast.
PWredundancy (draft-ietf-pwe3-redundancy-01) is a kind of pseudo-line redundancy protecting technology.In order to adapt to the high reliability demand of carrier ethernet, considering realizing route back mechanism during network design, when fault happens in operational, customer flow being switched to backup path rapidly, reducing traffic loss as much as possible.Operating path, backup path relation can consult to generate by protocol signaling, also can force to specify by user to generate.PWOAMMessageMapping technology and PWredundancy technology are mutually related, the former primary responsibility fault notification, the fault message that the latter's primary responsibility responding to announcements comes, the current active path of decision-making, instruct traffic forwarding, both complement each other, and jointly complete the Fast Convergent of fault.
Existing a kind of double-returning protection switching method, runs BFD, AC link at PW link and runs ether OAM, when ether OAM detects fault, by oammapping mode, fault is passed to BFD by ether OAM, realize transmission and the interlock of end-to-end fault.Thus reduce the impact of network failure on business, reduce the disabled probability of business, improve the reliability of business.
The method of existing a kind of switching back links between networks, when TMPLS network and SDH network hybrid networking (PW dual homed and AC dual homed), SDH network switchback is under the prerequisite of main path, notify that TMPLS network far-end PE carries out PW switchback at once, eliminate both sides WTR (WaitToRestore) the inconsistent impact brought.Improve reliability and the flexibility of network, effectively ensure that the carrier class pretection switch of bearer service.
In sum, in existing PW dual homed network design (see Fig. 1), PE1 disposes PW1 and PW2; form PW dual-homing protection; CE disposes AC1 and AC2, and form MC-LAG (MultiChassis-LinkAggregationGroup) protection, PE2 and PE3 forms main backup path.Following problem is there is in network when switching:
During normal operation, service traffics are along main path (PE1-PE2-CE) two-way converting; Once AC1 link occurs fault in main path, CE and PE2 all instant perception of energy, one side CE can reselect AC2 and carry out traffic forwarding, CE effluent amount performance of handoffs T
cE performance of handoffs=T
cE fault detect+ T
cE switching behavior; On the other hand, PE2 needs " AC1 fault " information to pass to PE1 by oammapping technology, and PE1 reselects PW2 and carries out traffic forwarding, PE1 effluent amount performance of handoffs T
pE1 performance of handoffs=T
pE2 fault detect+ T
pE2 fault delivery+ T
pE1 switching behavior.Because flow depends on the Path selection of both sides, the flow switch performance of whole network is MAX (T
cE performance of handoffs, T
pE1 performance of handoffs); Consider T
fault detectand T
switching behaviorbe necessary two steps of flow switch, technology is also similar, but T
pE2 fault deliverybe uncontrollable, existing fault delivery mostly takes LDP signaling, BFD or TP-OAM mode etc., first all needs to do a series of expansion to LDP, BFD, TP-OAM, adds the equipment complexity of PE2; Fault delivery message needs to cross over PE2-PE1 network in addition, and when network is larger, propagation delay time can become large, and the possibility of message dropping also can increase, and may make T like this
pE2 fault deliverybecome the performance of handoffs bottleneck of whole network.
Visible, T in the handoff technique of existing PW dual homed network
pE2 fault deliveryuncontrollable, network performance of handoffs cannot be ensured.
Summary of the invention
Embodiments provide a kind of changing method of pseudo-line dual homed network, system and dual-homed Provider Equipment, in order to solve existing PW dual homed network handoff technique in T
pE2 fault deliverythe problem uncontrollable, network performance of handoffs cannot be ensured.
Embodiments provide a kind of changing method of pseudo-line dual homed network, comprising:
When primary link break down, ustomer premises access equipment by flow switch to reserve link time, the dual-homed Provider Equipment of master in primary link is enabled centre and is switched pseudo-line, and it is the pseudo-line set up between for subsequent use dual-homed Provider Equipment in the dual-homed Provider Equipment of described master and reserve link that pseudo-line is switched in described centre;
Flow switch to described centre is switched pseudo-line and is transmitted by the dual-homed Provider Equipment of described master.
Described changing method, also comprises:
When described primary link failure recover, described ustomer premises access equipment by flow delay switchback to described primary link time, flow switchback to described primary link transmits by the dual-homed Provider Equipment of described master.
Described when primary link break down, ustomer premises access equipment by flow switch to reserve link time, the dual-homed Provider Equipment of the master in primary link is enabled before centre switches pseudo-line, also comprises:
Physical connection is set up and pseudo-line is switched in described centre between the dual-homed Provider Equipment of described master and described dual-homed Provider Equipment for subsequent use;
Described primary link and described centre are switched pseudo-line and are formed protection relation by the dual-homed Provider Equipment of described master, pseudo-line is switched in main pseudo-line and described centre associate, when described primary link break down, ustomer premises access equipment by flow switch to reserve link time, pseudo-line is switched in described centre enable; When described primary link failure recover, described ustomer premises access equipment by flow delay switchback to described primary link time, pseudo-line is switched in described centre not enable.
The state of described primary link and reserve link is obtained through consultation by the dual-homed Provider Equipment of described master and described ustomer premises access equipment.
Embodiments provide a kind of dual-homed Provider Equipment, comprising:
Enable unit, for breaking down when primary link, ustomer premises access equipment by flow switch to reserve link time, enable centre and switch pseudo-line, it is the pseudo-line set up between for subsequent use dual-homed Provider Equipment in the dual-homed Provider Equipment of described master and reserve link that pseudo-line is switched in described centre;
Switch unit, transmits for pseudo-line is switched in flow switch to described centre.
Described dual-homed Provider Equipment, also comprises:
Switchback unit, for recovering when described primary link failure, described ustomer premises access equipment by flow delay switchback to described primary link time, flow switchback to described primary link is transmitted.
Described dual-homed Provider Equipment, also comprises:
Connection establishment unit, for setting up physical connection between described dual-homed Provider Equipment for subsequent use and pseudo-line is switched in described centre;
Setting unit, protection relation is formed for described primary link and described centre are switched pseudo-line, pseudo-line is switched in main pseudo-line and described centre associate, when described primary link break down, ustomer premises access equipment by flow switch to reserve link time, pseudo-line is switched in described centre enable; When described primary link failure recover, described ustomer premises access equipment by flow delay switchback to described primary link time, pseudo-line is switched in described centre not enable.
Described dual-homed Provider Equipment, also comprises:
State acquiring unit, for obtaining the state of described primary link and reserve link through consultation with described ustomer premises access equipment.
Embodiments provide a kind of switched system of pseudo-line dual homed network, comprising:
Ustomer premises access equipment, for when primary link breaks down, by flow switch to reserve link;
The dual-homed Provider Equipment of master in primary link, for described ustomer premises access equipment by flow switch to reserve link time, pseudo-line is switched in flow switch to centre transmit, it is the pseudo-line set up between for subsequent use dual-homed Provider Equipment in the dual-homed Provider Equipment of described master and described reserve link that pseudo-line is switched in described centre.
Described ustomer premises access equipment, also for when described primary link failure recovers, by flow delay switchback to described primary link;
The dual-homed Provider Equipment of master in described primary link, also for described ustomer premises access equipment by flow delay switchback to described primary link time, flow switchback is transmitted to described primary link.
The changing method of the pseudo-line dual homed network that the embodiment of the present invention provides switches pseudo-line by newly-increased centre, improves network performance of handoffs, improves switchback performance, ensure that the stability of network, be supplied to the service that client is more perfect.
Accompanying drawing explanation
Fig. 1 is the scene topological diagram of existing common PW dual homed network;
Fig. 2 is the changing method flow chart of pseudo-line dual homed network in the embodiment of the present invention;
Fig. 3 is the module interaction figure of PE2 in the embodiment of the present invention;
Fig. 4 is the scene topological diagram of PW dual homed network in the embodiment of the present invention;
Fig. 5 is the structural representation of dual-homed Provider Equipment in the embodiment of the present invention;
Fig. 6 is the structural representation of another kind of dual-homed Provider Equipment in the embodiment of the present invention.
Embodiment
For the embodiment of the present invention will be solved technical problem, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 2, embodiments provide a kind of changing method of pseudo-line dual homed network, comprising:
S101, when primary link AC1 break down, ustomer premises access equipment CE by flow switch to reserve link AC2 time, master in primary link AC1 dual-homed Provider Equipment PE2 enables centre, and to switch pseudo-line I-PW, I-PW be the pseudo-line set up between for subsequent use dual-homed Provider Equipment PE3 in PE2 and AC2;
Flow switch transmits to I-PW by S102, PE2.
After step S102 completes, flow is switched on path that pseudo-line I-PW+ reserve link AC2 formed and is forwarded in the middle of main pseudo-line PW1+, completes the switching of flow during primary link failure.
Performance of handoffs is analyzed: AC1 link occurs fault, CE and PE2 all instant perception of energy, one side CE can reselect AC2 and carry out traffic forwarding, CE effluent amount performance of handoffs T
cE performance of handoffs=T
cE fault detect+ T
cE switching behavior; On the other hand, PE2, without the need to " AC1 fault " information is passed to PE1 by oammapping technology, only needs PE2 to forward flow to I-PW, PE2 effluent amount performance of handoffs T
pE2 performance of handoffs=T
pE2 fault detect+ T
pE2 switching behavior.Because flow depends on the Path selection of both sides, the flow switch performance of whole network is MAX (T
cE performance of handoffs, T
pE2 performance of handoffs), decrease T
pE2 fault deliveryuncertain factor, improve network performance of handoffs.
Before execution step S101, above-mentioned changing method also can comprise the following steps:
Physical connection and I-PW is set up between PE2 and PE3;
AC1 and I-PW is formed protection relation by PE2, by PW1 and I-PW association, when AC1 break down, CE by flow switch to AC2 time, I-PW is enable; When AC1 fault recovery, CE by flow delay switchback to AC1 time, I-PW is not enable.
Wherein, the state of AC1 and AC2 is obtained through consultation by PE2 and CE.
In addition, also there is following problem when switchback in prior art: after AC1 link occurs fault, and flow switch is to backup path (PE1-PE3-CE) two-way converting; When AC1 link failure recovery, need flow switchback to forward to main path (PE1-PE2-CE), because the forward-path that when main path is network design, operator is more expected, the advantage of the aspects such as QoS may be had.Existing switchback technology mostly adopts WTR (WaitToRestore) time delay switchback mode (not switchback immediately when namely AC1 recovers, but the switchback again that waits for a period of time, flow switch concussion mainly for preventing AC1 state from shaking impact), in PW dual homed network, PE1 and CE all adopts in this way separately, during AC1 link-recovery, CE and PE2 all can perception, and CE carries out WTR time delay and waits for switchback on the one hand; PE2 needs " AC1 recovery " to pass to PE1 in addition, and PE1 also carries out WTR time delay and waits for switchback.CE and PE1 carries out WTR delay process separately, and (WTR value can configure separately, back off timer is safeguarded separately), lack interaction mechanism again between the two, finally cause both switchbacks inconsistent for opportunity, its time difference is exactly switchback performance, may produce insupportable a large amount of packet loss.
In order to solve the problems referred to above that prior art exists, above-mentioned changing method also can comprise the following steps:
When AC1 fault recovery, CE by flow delay switchback to AC1 time, flow switchback is transmitted to AC1 by PE1.
Switchback performance evaluation: during AC1 link failure recovery, CE and PE2 all instant perception of energy, but PE2 and CE does not temporarily process flow switchback, does not now have packet loss; After the WTR time delay of CE, CE can reselect AC1 converting flow, its switchback performance T
cE switchback performance=T
the behavior of CE switchback(directly trigger switchback behavior after WTR time delay, therefore without the need to T
cE fault detect); On the other hand, after PE2 knows CE switchback to AC1, PE2 by flow switchback to AC1, its switchback performance T
pE2 switchback performance=T
mC-LAG+ T
the behavior of PE2 switchback.Because flow depends on the Path selection of both sides, the flow switch performance of whole network is MAX (T
cE switchback performance, T
pE2 switchback performance), switchback mode of the present invention only depends on the WTR delay process of CE equipment to control the switchback opportunity of whole network, improves switchback performance, avoids inconsistent problem on switchback opportunity.
To sum up, the changing method of the pseudo-line dual homed network that the embodiment of the present invention provides switches pseudo-line in the middle of newly-increased, improves network performance of handoffs, improves switchback performance, ensure that the stability of network, be supplied to the service that client is more perfect.And the method realizes based on the existing hardware of equipment completely, only need the technical support that software control aspect is provided, easy to implement.
Lift a specific embodiment below and the changing method that the embodiment of the present invention provides is described
As shown in Figure 3, PE2 is arranged with lower module:
PW transmits module: the reception processing logic mainly realizing PW side data message, and namely PE equipment receives data message from PW side, transmits carry out routing and forward according to PW; Level belongs to forwarding face;
AC transmits module: the reception processing logic mainly realizing AC side data message, and namely PE equipment receives data message from AC side, transmits carry out routing and forward according to AC; Level belongs to forwarding face;
Service management module: primary responsibility AC information associates with PW information; Level belongs to chain of command, serves forwarding face;
I-PW protection group module: major maintenance AC and I-PW protects relation, and AC is defaulted as main path, and I-PW is defaulted as backup path; State according to AC and I-PW decides preferred path; Level belongs to chain of command;
MC-LAG module: the active/standby state of major maintenance AC; The upper AC state of PE controls by the MC-LAG module of CE equipment is unified, is informed by protocol massages.
Composition graphs 4, the quick switching that this specific embodiment realizes PW dual homed network comprises the following steps:
Steps A, carry out the deployment (with reference to figure 1) of common PW dual homed network.
Steps A specifically comprises:
Set up VLL business between A1, PE1 and PE2, form PW1;
Set up VLL business between A2, PE1 and PE3, form PW2;
PW1 and PW2 is formed PW dual-homing protection group relation by A3, PE1, and PW1 is main, and PW2 is standby;
A4, PE2, PE3, CE dispose MC-LAG dual-home network, AC1 and AC2 is formed protection group relation, and AC1 is main, and AC2 is standby.
After steps A completes, common PW dual homed network design completes.
PE2 upper " service management module ", according to VLL business configuration, safeguards " AC transmits module " and " PW transmits module ".Wherein " AC transmits module " forms AC and transmits (see table 1), and " PW transmits module " forms PW and transmit (see table 2) "; Under normal circumstances, the flow of PE1-CE selects " PE1-PE2-CE " for forward-path according to table 1, table 2, and flow can intercommunication.
| Entrance | Outlet |
| AC1 | PW1 |
Table 1:PE2 device A C transmits
| Entrance | Outlet |
| PW1 | AC1 |
Table 2:PE2 equipment PW transmits
Step B, on the basis of common PW dual homed network, newly-increased I-PW function.
Step B specifically comprises:
B1, PE2 and PE3 need to set up physical connection;
B2, PE2 are connected with PE3 and get through route, set up outer layer tunnel;
On B3, PE2 and PE3, in VLL business, a newly-built new PW, is called I-PW, and is tied to I-PW protection group with AC.
After step B completes, novel PW dual homed network design completes.
Wherein, AC1 and I-PW is formed protection relation by " I-PW protection group module ", and acquiescence AC1 is active, I-PW is standby; " AC transmits module " and " PW transmits module " is affected by " I-PW protection group module ", there is the renewal of forwarding information, in table 3, and table 4.Under normal circumstances, the flow of PE1-CE selects " PE1-PE2-CE " to be forward-path according to active entry in table 3, table 4, and flow can intercommunication.
| Entrance | Outlet |
| AC1 | PW1 |
Table 3:PE2 device A C transmits
Table 4:PE2 equipment PW transmits
When step C, AC1 link occurs fault, " MC-LAG module " carries out protocol massages immediately with CE mutual, and it be standby, AC2 is active that MC-LAG consultation negotiates AC1; It is AC1 be standby, I-PW is active that " MC-LAG module " notice " I-PW protection group module " upgrades activestandby state;
Activestandby state after renewal can inform to " service management module " by step D, " I-PW protection group module ", refreshed transmitted by " service management module ", finally " AC transmits module " and " PW transmits module " information is upgraded, in table 5, table 6; The flow of PE1-CE selects " PE1-PE2-PE3-CE " to be forward-path according to active entry in table 6, and flow can intercommunication;
| Entrance | Outlet |
| AC1 | PW1 |
Table 5:PE2 device A C transmits
Table 6:PE2 equipment PW transmits
So far, after AC1 link occurs fault, flow switch completes.
Performance of handoffs is analyzed: AC1 link occurs fault, CE and PE2 all instant perception of energy, one side CE can reselect AC2 and carry out traffic forwarding, CE effluent amount performance of handoffs T
cE performance of handoffs=T
cE fault detect+ T
cE switching behavior; On the other hand, PE2, without the need to " AC1 fault " information is passed to PE1 by oammapping technology, only needs PE2 to forward flow to I-PW path herein, PE2 effluent amount performance of handoffs T
pE2 performance of handoffs=T
pE2 fault detect+ T
pE2 switching behavior.Because flow depends on the Path selection of both sides, the flow switch performance of whole network is MAX (T
cE performance of handoffs, T
pE2 performance of handoffs), decrease T
pE2 fault deliveryuncontrollable factor, its performance more common PW dual homed network handoff technique is greatly improved.
When step e, AC1 link failure recovery, because CE adopts WTR time delay switchback strategy, now " MC-LAG module " and CE carry out alternately, it is standby that MC-LAG agreement still can negotiate AC1, AC2 is active, and its state does not change temporarily, and corresponding state of transmitting still remains unchanged, flow still selects " PE1-PE2-PE3-CE " to be forward-path, and flow can intercommunication;
After step F, CE equipment WTR time-out, it be active, AC2 is standby that MC-LAG consultation negotiates AC1 again; Informed by protocol massages " the MC-LAG module " of PE2;
Step G, " MC-LAG module " response are after negotiation result, and to upgrade activestandby state be AC1 to notice " I-PW protection group module " be active, I-PW is standby;
Activestandby state after renewal can inform to " service management module " by step H, " I-PW protection group module ", refreshed transmitted by " service management module ", finally " AC transmits module " and " PW transmits module " information is upgraded, in table 7, table 8; The flow of PE1-CE selects " PE1-PE2-CE " to be forward-path according to active entry in table 8, and flow can intercommunication;
| Entrance | Outlet |
| AC1 | PW1 |
Table 7:PE2 device A C transmits
Table 8:PE2 equipment PW transmits
So far, AC1 link failure recovery and after WTR time delay, flow switchback completes.
Switchback performance evaluation: during AC1 link failure recovery, CE and PE2 all instant perception of energy, but the AC1 state of MC-LAG is still standby, PE2 and CE does not temporarily process flow switchback, does not now have packet loss; After the WTR time delay of CE, AC1 state is set to active by MC-LAG agreement again, and CE can reselect AC1 converting flow, its switchback performance T on the one hand
cE switchback performance=T
cE switchback row for(directly trigger switchback behavior after WTR time delay, therefore without the need to T
cE fault detect); On the other hand, after " the MC-LAG module " of PE2 responds negotiation result, again refresh and transmit, reselect AC1 path converting flow, its switchback performance T
pE2 switchback performance=T
mC-LAG+ T
the behavior of PE2 switchback.Because flow depends on the Path selection of both sides, the flow switch performance of whole network is MAX (T
cE switchback performance, T
pE2 switchback performance), avoid two ends and carry out WTR process separately and the switchback inconsistence problems on opportunity caused, only depend on the WTR delay process of CE equipment to control the switchback opportunity of whole network, improve switchback performance.
As shown in Figure 5, the embodiment of the present invention additionally provides a kind of dual-homed Provider Equipment, comprising:
Enable unit, for breaking down when primary link, ustomer premises access equipment by flow switch to reserve link time, enable centre and switch pseudo-line, it is lead the pseudo-line set up between for subsequent use dual-homed Provider Equipment in dual-homed Provider Equipment and reserve link that pseudo-line is switched in centre;
Switch unit, transmits for pseudo-line is switched in flow switch to centre.
As shown in Figure 6, above-mentioned dual-homed Provider Equipment, can also comprise:
Switchback unit, for when primary link failure recover, ustomer premises access equipment by flow delay switchback to primary link time, flow switchback is transmitted to primary link.
Again as shown in Figure 6, above-mentioned dual-homed Provider Equipment, can also comprise:
Connection establishment unit, for setting up physical connection between dual-homed Provider Equipment for subsequent use and pseudo-line is switched in centre;
Setting unit, forms protection relation for primary link and centre are switched pseudo-line, pseudo-line is switched in main pseudo-line and centre and associates, when primary link break down, ustomer premises access equipment by flow switch to reserve link time, centre is switched pseudo-line enable; When primary link failure recover, ustomer premises access equipment by flow delay switchback to primary link time, centre is switched pseudo-line not enable.
Again as shown in Figure 6, above-mentioned dual-homed Provider Equipment, can also comprise:
State acquiring unit, for obtaining the state of primary link and reserve link through consultation with ustomer premises access equipment.
The dual-homed Provider Equipment that the embodiment of the present invention provides not only increases network performance of handoffs, further improves switchback performance, ensure that the stability of network, is supplied to the service that client is more perfect.
In addition, the embodiment of the present invention additionally provides a kind of switched system of pseudo-line dual homed network, comprising:
Ustomer premises access equipment, for when primary link breaks down, by flow switch to reserve link;
The dual-homed Provider Equipment of master in primary link, for ustomer premises access equipment by flow switch to reserve link time, pseudo-line is switched in flow switch to centre transmit, it is lead the pseudo-line set up between for subsequent use dual-homed Provider Equipment in dual-homed Provider Equipment and reserve link that pseudo-line is switched in centre.
Wherein, ustomer premises access equipment, also can be used for when primary link failure recovers, by flow delay switchback to primary link;
The dual-homed Provider Equipment of master in primary link, be also used in ustomer premises access equipment by flow delay switchback to primary link time, flow switchback is transmitted to primary link.
The switched system of the pseudo-line dual homed network that the embodiment of the present invention provides not only increases network performance of handoffs, further improves switchback performance, ensure that the stability of network, be supplied to the service that client is more perfect.
One of ordinary skill in the art will appreciate that, the all or part of step realized in the method for the above-mentioned fact is that the hardware that can carry out instruction relevant by program has come, above-mentioned program can be stored in the storage medium that a computer can read, this program, when performing, comprises above-mentioned step.Above-mentioned storage medium can be ROM/RAM, disk, CD etc.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a changing method for pseudo-line dual homed network, is characterized in that, comprising:
When primary link break down, ustomer premises access equipment by flow switch to reserve link time, the dual-homed Provider Equipment of master in primary link is enabled centre and is switched pseudo-line, and it is the pseudo-line set up between for subsequent use dual-homed Provider Equipment in the dual-homed Provider Equipment of described master and reserve link that pseudo-line is switched in described centre;
Flow switch to described centre is switched pseudo-line and is transmitted by the dual-homed Provider Equipment of described master.
2. changing method as claimed in claim 1, is characterized in that, also comprise:
When described primary link failure recover, described ustomer premises access equipment by flow delay switchback to described primary link time, flow switchback to described primary link transmits by the dual-homed Provider Equipment of described master.
3. changing method as claimed in claim 2, is characterized in that, described when primary link break down, ustomer premises access equipment by flow switch to reserve link time, the dual-homed Provider Equipment of the master in primary link is enabled before centre switches pseudo-line, also comprises:
Physical connection is set up and pseudo-line is switched in described centre between the dual-homed Provider Equipment of described master and described dual-homed Provider Equipment for subsequent use;
Described primary link and described centre are switched pseudo-line and are formed protection relation by the dual-homed Provider Equipment of described master, pseudo-line is switched in main pseudo-line and described centre associate, when described primary link break down, ustomer premises access equipment by flow switch to reserve link time, pseudo-line is switched in described centre enable; When described primary link failure recover, described ustomer premises access equipment by flow delay switchback to described primary link time, pseudo-line is switched in described centre not enable.
4. changing method as claimed in claim 3, is characterized in that,
The state of described primary link and reserve link is obtained through consultation by the dual-homed Provider Equipment of described master and described ustomer premises access equipment.
5. a dual-homed Provider Equipment, is characterized in that, comprising:
Enable unit, for breaking down when primary link, ustomer premises access equipment by flow switch to reserve link time, enable centre and switch pseudo-line, it is lead the pseudo-line set up between for subsequent use dual-homed Provider Equipment in dual-homed Provider Equipment and reserve link that pseudo-line is switched in described centre;
Switch unit, transmits for pseudo-line is switched in flow switch to described centre.
6. dual-homed Provider Equipment as claimed in claim 5, is characterized in that, also comprise:
Switchback unit, for recovering when described primary link failure, described ustomer premises access equipment by flow delay switchback to described primary link time, flow switchback to described primary link is transmitted.
7. dual-homed Provider Equipment as claimed in claim 6, is characterized in that, also comprise:
Connection establishment unit, for setting up physical connection between described dual-homed Provider Equipment for subsequent use and pseudo-line is switched in described centre;
Setting unit, protection relation is formed for described primary link and described centre are switched pseudo-line, pseudo-line is switched in main pseudo-line and described centre associate, when described primary link break down, ustomer premises access equipment by flow switch to reserve link time, pseudo-line is switched in described centre enable; When described primary link failure recover, described ustomer premises access equipment by flow delay switchback to described primary link time, pseudo-line is switched in described centre not enable.
8. dual-homed Provider Equipment as claimed in claim 7, is characterized in that, also comprise:
State acquiring unit, for obtaining the state of described primary link and reserve link through consultation with described ustomer premises access equipment.
9. a switched system for pseudo-line dual homed network, is characterized in that, comprising:
Ustomer premises access equipment, for when primary link breaks down, by flow switch to reserve link;
The dual-homed Provider Equipment of master in primary link, for described ustomer premises access equipment by flow switch to reserve link time, pseudo-line is switched in flow switch to centre transmit, it is the pseudo-line set up between for subsequent use dual-homed Provider Equipment in the dual-homed Provider Equipment of described master and described reserve link that pseudo-line is switched in described centre.
10. switched system as claimed in claim 9, is characterized in that,
Described ustomer premises access equipment, also for when described primary link failure recovers, by flow delay switchback to described primary link;
The dual-homed Provider Equipment of master in described primary link, also for described ustomer premises access equipment by flow delay switchback to described primary link time, flow switchback is transmitted to described primary link.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110137249.3A CN102325037B (en) | 2011-05-25 | 2011-05-25 | A kind of changing method of pseudo-line dual homed network, system and dual-homed Provider Equipment |
| PCT/CN2012/072915 WO2012159489A1 (en) | 2011-05-25 | 2012-03-23 | Switching method, system and dual homing provider device for pseudowire dual homing network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110137249.3A CN102325037B (en) | 2011-05-25 | 2011-05-25 | A kind of changing method of pseudo-line dual homed network, system and dual-homed Provider Equipment |
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| Publication Number | Publication Date |
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| CN102325037A CN102325037A (en) | 2012-01-18 |
| CN102325037B true CN102325037B (en) | 2016-01-20 |
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| CN201110137249.3A Expired - Fee Related CN102325037B (en) | 2011-05-25 | 2011-05-25 | A kind of changing method of pseudo-line dual homed network, system and dual-homed Provider Equipment |
Country Status (2)
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| CN (1) | CN102325037B (en) |
| WO (1) | WO2012159489A1 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102325037B (en) * | 2011-05-25 | 2016-01-20 | 中兴通讯股份有限公司 | A kind of changing method of pseudo-line dual homed network, system and dual-homed Provider Equipment |
| CN102801466B (en) * | 2012-08-17 | 2017-05-17 | 中兴通讯股份有限公司 | Method and device for handling single optical fiber fault |
| CN103634209B (en) | 2013-09-13 | 2017-02-08 | 华为技术有限公司 | Method and equipment for data transmission |
| CN105227332B (en) * | 2014-05-28 | 2019-01-18 | 中兴通讯股份有限公司 | PW double-returning protection switching method and system |
| 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 |
| CN104539532B (en) * | 2015-01-09 | 2018-03-20 | 烽火通信科技股份有限公司 | The system and method for NNI protections UNI based on LTE base station passed-back traffic |
| CN104753754A (en) * | 2015-03-12 | 2015-07-01 | 杭州华三通信技术有限公司 | Method and apparatus for transmitting messages |
| CN104753722B (en) * | 2015-04-08 | 2018-01-02 | 烽火通信科技股份有限公司 | A kind of DNI PW realization method and systems quickly switched |
| CN109756420B (en) * | 2017-11-07 | 2021-09-24 | 中兴通讯股份有限公司 | Detection method, storage medium and processor |
| CN111181876A (en) * | 2018-11-12 | 2020-05-19 | 南京机电职业技术学院 | Pseudo wire PW dual-homing protection switching method |
| CN110087333B (en) * | 2019-04-26 | 2020-12-04 | 新华三技术有限公司 | Method, device, equipment and storage medium for preventing service interruption |
| CN112769587B (en) * | 2019-11-05 | 2024-05-14 | 中兴通讯股份有限公司 | Forwarding method, equipment and storage medium for access traffic of dual homing device |
| CN111490932B (en) * | 2020-03-25 | 2022-03-29 | 新华三信息安全技术有限公司 | Communication method and device |
| CN111404812B (en) * | 2020-03-25 | 2022-04-01 | 新华三信息安全技术有限公司 | Communication method and device |
| CN111404813B (en) * | 2020-03-25 | 2022-04-01 | 新华三信息安全技术有限公司 | Communication method and device |
| CN111614553B (en) * | 2020-03-25 | 2022-03-29 | 新华三信息安全技术有限公司 | Communication 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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Also Published As
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| WO2012159489A1 (en) | 2012-11-29 |
| CN102325037A (en) | 2012-01-18 |
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