CN102325037A - Method and system for switching pseudo-wire dual-homing network and dual-homing operator equipment - Google Patents
Method and system for switching pseudo-wire dual-homing network and dual-homing operator equipment Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
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Abstract
The invention discloses a method and system for switching a pseudo-wire dual-homing network and dual-homing operator equipment, which are used for solving the problem that the traditional pseudo-wire dual-homing network switch technology cannot guarantee a network switch performance. The method comprises the steps of: when a main link breaks down and customer premise equipment switches flow to a standby link, enabling an intermediate switch pseudo-wire for main dual-homing operator equipment in the main link, wherein the intermediate switch pseudo-wire is a pseudo-wire established between the main dual-homing operator equipment and standby dual-homing operator equipment in the standby link; and switching the flow to the intermediate switch pseudo-wire by the main dual-homing operator equipment for transmission. In the technical scheme, by newly adding the intermediate switch pseudo-wire, the network switch performance and the switch-back performance are improved, the network stability is ensured, and a more faultless service can be provided to customers.
Description
Technical field
The present invention relates to the data network communications technical field, particularly a kind of changing method of pseudo-line dual homed network, system and dual-homed operator equipment.
Background technology
In order to satisfy the trend of the metropolitan area network business transition and the integration of three networks; Virtual network operator tends to adopt efficiently realizes multiple service supporting with grouping conveying network cheaply; The flexible net service is provided, improves network resource utilization, reduce the network design complexity; Strengthen the network SM, for it brings more economic benefit.
Layer 2 virtual private network L2VPN (Layer 2 Virtual Private Network) relies on ISP and Internet Service Provider in public network, to set up the technology of private data communication network.Can be divided into two kinds of business models of the professional VLL (Virtual Leased Line) of VPLS VPLS (Virtual Private Lan Service) and VLL, the former transmits based on ether is professional, and support point is to the network design of multiple spot; The latter is that VLL is professional, based on two layer service emulation such as ether, ATM, TDM, HDLC, FR, PPP, only supports the network design of point-to-point.
Because the high reliability demand of carrier class Ethernet; Business convergence speed was paid much attention to when operator broke down to network; This just need when network design, more pay attention to failure response and ability is switched in protection, and IETF organizes the consideration for this reason just of PW OAM Message Mapping that PWE3 working group proposes and PW redundancy technology.
PW OAM Message Mapping (draft-ietf-pwe3-oam-msg-map-12) is a kind of pseudo-lines fault annunciation techniques.When the point-to-point artificial service; Support AC (place in circuit) and the fault of PW (pseudo-line) to shine upon; Be AC when breaking down, realize the interlock with PW layer OAM (Operation Administration& Maintenance), through the PWE3 protocol massages with fault notification to far-end; Far-end can know fast that this service path breaks down, carries out corresponding subsequent processing.
PW redundancy (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 class Ethernet, consider during network design the realizing route back mechanism when fault happens in operational, customer flow to be switched to backup path apace, reduce traffic loss as much as possible.Operating path, backup path relation can consult to generate through protocol signaling, also can force to specify through the user to generate.PW OAM Message Mapping technology is to be mutually related with PW redundancy technology, and the former mainly is responsible for fault notification, and the latter mainly is responsible for the fault message of responding to announcements; The current active path of making a strategic decision; Instruct flow to transmit, both complement each other, and accomplish the quick convergence of fault jointly.
Existing a kind of double-returning protection switching method, at PW link operation BFD, AC link operation ether OAM when ether OAM detects fault, passes to BFD with fault by ether OAM through oam mapping mode, realizes the transmission and the interlock of end-to-end fault.Thereby reduced influence of network failure on service, reduced professional disabled probability, improved professional reliability.
Existing a kind of link between networks returns the method for cutting fast; When TMPLS network and SDH network hybrid networking (PW dual homed and AC dual homed); The SDH network returns under the prerequisite that switches to main path; Notify TMPLS network far-end PE to carry out PW at once and return and cut, eliminate the inconsistent influence that brings of both sides WTR (Wait To Restore).Improved the reliability and the flexibility of network, guaranteed that effectively the carrier class protection of bearer service is switched.
In sum, (see figure 1) in the existing P W dual homed network design, PE1 disposes PW1 and PW2; Form the PW dual-homing protection; CE disposes AC1 and AC2, forms MC-LAG (Multi Chassis-Link Aggregation Group) protection, and PE2 and PE3 form the master backup path.There is following problem in network when switching:
During normal the operation, service traffics are along the two-way forwarding of main path (PE1-PE2-CE); In case AC1 link occurs fault in the main path, CE and PE2 be perception immediately all, and one side CE can reselect AC2 and carry out flow forwarding, CE effluent amount performance of handoffs T
The CE performance of handoffs=T
The CE fault detect+ T
The CE switching behaviorOn the other hand, PE2 needs " AC1 fault " information is passed to PE1 through oam mapping technology, and PE1 reselects PW2 and carries out flow forwarding, PE1 effluent amount performance of handoffs T
The PE1 performance of handoffs=T
The PE2 fault detect+ T
The PE2 fault delivery+ T
The PE1 switching behaviorBecause flow depends on the Path selection of both sides, the flow performance of handoffs of whole network is MAX (T
The CE performance of handoffs, T
The PE1 performance of handoffs); Consider T
Fault detectAnd T
Switching behaviorBe that flow switches two necessary steps, technology also is similar, but T
The PE2 fault deliveryBe uncontrollable, LDP signaling, BFD or TP-OAM mode etc. are mostly taked in the existing fault transmission, at first all need do a series of expansion to LDP, BFD, TP-OAM, have increased the equipment complexity of PE2; The fault delivery message need be crossed over the PE2-PE1 network in addition, and when network was big, propagation delay time can become greatly, and the possibility of message dropping also can increase, and may make T like this
The PE2 fault deliveryBecome the performance of handoffs bottleneck of whole network.
Thus it is clear that, T in the handoff technique of existing PW dual homed network
The PE2 fault deliveryUncontrollable, can't guarantee the network performance of handoffs.
Summary of the invention
The embodiment of the invention provides a kind of changing method, system and dual-homed operator equipment of pseudo-line dual homed network, in order to T in the handoff technique that solves existing PW dual homed network
The PE2 fault deliveryUncontrollable, as can't to guarantee network performance of handoffs problem.
The embodiment of the invention provides a kind of changing method of pseudo-line dual homed network, comprising:
When primary link breaks down, when ustomer premises access equipment switches to reserve link with flow; The dual-homed operator of master in primary link equipment is switched pseudo-line in the middle of launching, and it is the pseudo-line of setting up between the subsequent use dual-homed operator equipment in said master dual-homed operator equipment and the reserve link that pseudo-line is switched in said centre;
The dual-homed operator of said master equipment switches to said centre with flow and switches pseudo-line and transmit.
Described changing method also comprises:
When said primary link failure recovers, said ustomer premises access equipment is delayed time back flow when cutting to said primary link, the dual-homed operator of said master equipment returns flow to cut to said primary link and transmits.
Said when primary link breaks down, when ustomer premises access equipment switches to reserve link with flow, the dual-homed operator of the master in primary link equipment is switched before the pseudo-line in the middle of launching, and also comprises:
Set up physical connection between said master dual-homed operator equipment and the said subsequent use dual-homed operator equipment and pseudo-line is switched in said centre;
The dual-homed operator of said master equipment is switched pseudo-line formation protection relation with said primary link and said centre; To lead pseudo-line and said centre, to switch pseudo-line related; When said primary link breaks down, when ustomer premises access equipment switches to reserve link with flow, pseudo-line is switched in said centre enable; When said primary link failure recovers, said ustomer premises access equipment is delayed time back flow when cutting to said primary link, pseudo-line is switched in said centre do not enable.
The state of said primary link and reserve link is obtained by said master dual-homed operator equipment and said ustomer premises access equipment through consultation.
The embodiment of the invention provides a kind of dual-homed operator equipment, comprising:
Launch the unit; Be used for when primary link breaks down, when ustomer premises access equipment switches to reserve link with flow; Switch pseudo-line in the middle of launching, it is the pseudo-line of setting up between the subsequent use dual-homed operator equipment in said master dual-homed operator equipment and the reserve link that pseudo-line is switched in said centre;
Switch unit is used for that flow is switched to said centre and switches pseudo-line and transmit.
Described dual-homed operator equipment also comprises:
Return cut unit, be used for flow being delayed time back when cutting to said primary link, flow is returned to cut to said primary link transmit when said primary link failure recovery, said ustomer premises access equipment.
Described dual-homed operator equipment also comprises:
Connect and to set up the unit, be used for and said subsequent use dual-homed operator equipment between set up physical connection and pseudo-line is switched in said centre;
The unit is set; Be used for said primary link and said centre are switched pseudo-line formation protection relation; To lead pseudo-line and said centre, to switch pseudo-line related, when said primary link breaks down, when ustomer premises access equipment switches to reserve link with flow, pseudo-line is switched in said centre enable; When said primary link failure recovers, said ustomer premises access equipment is delayed time back flow when cutting to said primary link, pseudo-line is switched in said centre do not enable.
Described dual-homed operator equipment also comprises:
The state acquiring unit is used for obtaining through consultation with said ustomer premises access equipment the state of said primary link and reserve link.
The embodiment of the invention provides a kind of switched system of pseudo-line dual homed network, comprising:
Ustomer premises access equipment is used for when primary link breaks down, flow being switched to reserve link;
The dual-homed operator of master in primary link equipment; Be used for when said ustomer premises access equipment switches to reserve link with flow; Flow is switched pseudo-line in the middle of switching to transmit, it is the pseudo-line of setting up between the subsequent use dual-homed operator equipment in said master dual-homed operator equipment and the said reserve link that pseudo-line is switched in said centre.
Said ustomer premises access equipment also is used for when said primary link failure recovers, and flow is delayed time back cut to said primary link;
The dual-homed operator of master in said primary link equipment also is used at said ustomer premises access equipment flow being delayed time back when cutting to said primary link, flow is returned to cut to said primary link transmit.
The changing method of the pseudo-line dual homed network that the embodiment of the invention provides is switched pseudo-line through newly-increased centre, has improved the network performance of handoffs, has improved time to cut performance, has guaranteed stability of network, offers the more perfect service of client.
Description of drawings
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 invention;
Fig. 3 is the module interaction figure of PE2 in the embodiment of the invention;
Fig. 4 is the scene topological diagram of PW dual homed network in the embodiment of the invention;
Fig. 5 is the structural representation of dual-homed operator equipment in the embodiment of the invention;
Fig. 6 is the structural representation of another kind of dual-homed operator equipment in the embodiment of the invention.
Embodiment
For technical problem, technical scheme and advantage that the embodiment of the invention will be solved is clearer, will combine accompanying drawing and specific embodiment to be described in detail below.
As shown in Figure 2, the embodiment of the invention provides a kind of changing method of pseudo-line dual homed network, comprising:
S101, when primary link AC1 breaks down, when ustomer premises access equipment CE switches to reserve link AC2 with flow; Switch pseudo-line I-PW in the middle of the equipment PE2 of the dual-homed operator of master among the primary link AC1 launches, I-PW is the pseudo-line of setting up between the subsequent use dual-homed equipment PE3 of operator among PE2 and the AC2;
S102, PE2 switch to I-PW with flow and transmit.
After step S102 accomplished, flow was switched on the formed path of pseudo-line I-PW+ reserve link AC2 in the middle of main pseudo-line PW1+ and is transmitted, the switching of flow when accomplishing primary link failure.
The performance of handoffs analysis: the AC1 link occurs fault, CE and PE2 be perception immediately all, and one side CE can reselect AC2 and carry out flow forwarding, CE effluent amount performance of handoffs T
The CE performance of handoffs=T
The CE fault detect+ T
The CE switching behaviorOn the other hand, PE2 need not " AC1 fault " information is passed to PE1 through oam mapping technology, only needs PE2 to forward flow to I-PW and gets final product, PE2 effluent amount performance of handoffs T
The PE2 performance of handoffs=T
The PE2 fault detect+ T
The PE2 switching behaviorBecause flow depends on the Path selection of both sides, the flow performance of handoffs of whole network is MAX (T
The CE performance of handoffs, T
The PE2 performance of handoffs), reduced T
The PE2 fault deliveryUncertain factor, improved the network performance of handoffs.
Before execution in step S101, above-mentioned changing method also can may further comprise the steps:
Set up physical connection and I-PW between PE2 and the PE3;
PE2 forms the protection relation with AC1 and I-PW, and PW1 is related with I-PW, when AC1 breaks down, when CE switches to AC2 with flow, I-PW is enabled; When AC1 fault recovery, CE flow is delayed time back when cutting to AC1, I-PW is not enabled.
Wherein, the state of AC1 and AC2 is obtained by PE2 and CE through consultation.
In addition, also there is following problem in prior art returning when cutting: after the AC1 link occurs fault, flow switches to the two-way forwarding of backup path (PE1-PE3-CE); When the AC1 link failure recovery, need flow be returned and switch to main path (PE1-PE2-CE) and transmit, because the main path forward-path that operator is more expected when being network design, possibly have the advantage of aspects such as QoS.Existing time incision technology mostly adopts WTR (Wait To Restore) the butt formula of delaying time back (not return immediately when being the AC1 recovery and cut; Cut but wait for a period of time to return again, mainly switch concussion for the flow that prevents AC1 state concussion influence), in PW dual homed network; PE1 and CE all adopt this mode separately; During the AC1 link-recovery, CE and PE2 all can perception, and CE carries out the WTR time-delay and waits for back and cutting on the one hand; PE2 needs " AC1 recovery " passed to PE1 in addition, and PE1 also carries out WTR time-delay to be waited for back and cutting.CE and PE1 carry out the WTR delay process separately, and (the WTR value can dispose separately; Back off timer is safeguarded separately), lack interaction mechanism between the two again, it is inconsistent finally to cause both to return the opportunity of cutting; Its time difference returns exactly and cuts 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 may further comprise the steps:
When AC1 fault recovery, CE are delayed time back flow when cutting to AC1, PE1 returns flow to cut to AC1 and transmits.
Return and to cut performance evaluation: during the AC1 link failure recovery, CE and PE2 all can instant perception, do not return and cut but PE2 and CE temporarily do not handle flow, do not have packet loss at this moment; After the WTR of CE time-delay, CE can reselect the AC1 converting flow, and performance T is cut in its time
CE returns and cuts performance=T
CE returns the behavior of cutting(behavior of cutting is directly triggered back in WTR time-delay back, therefore need not T
The CE fault detect); On the other hand, PE2 know CE return switch to AC1 after, PE2 returns flow and switches to AC1, performance T is cut in its time
PE2 returns and cuts performance=T
MC-LAG+ T
PE2 returns the behavior of cuttingBecause flow depends on the Path selection of both sides, the flow performance of handoffs of whole network is MAX (T
CE returns and cuts performance, T
PE2 Return and cut performance), the present invention returns WTR delay process that the butt formula only depends on CE equipment and controls returning of whole network and cut opportunity, has improved time to cut performance, has avoided time cutting inconsistent problem on opportunity.
To sum up, the changing method of the pseudo-line dual homed network that the embodiment of the invention provides is switched pseudo-line through in the middle of newly-increased, has improved the network performance of handoffs, has improved time to cut performance, has guaranteed stability of network, offers the more perfect service of client.And this method realizes based on the existing hardware of equipment fully, and the technical support of software control aspect only need be provided, and is easy to implement.
Lift the changing method that the specific embodiment explanation embodiment of the invention provides below
As shown in Figure 3, on PE2, be provided with lower module:
PW transmits module: mainly realize the reception processing logic of PW side data message, promptly PE equipment is received data message from the PW side, transmits according to PW and carries out routing and forward; Belong to forwarding face on the level;
AC transmits module: mainly realize the reception processing logic of AC side data message, promptly PE equipment is received data message from the AC side, transmits according to AC and carries out routing and forward; Belong to forwarding face on the level;
Service management module: mainly be responsible for the related of AC information and PW information; Belong to chain of command on the level, serve forwarding face;
I-PW protects pack module: mainly safeguard AC and I-PW protection relation, AC is defaulted as main path, and I-PW is defaulted as backup path; State according to AC and I-PW decides preferred path; Belong to chain of command on the level;
MC-LAG module: the active/standby state of mainly safeguarding AC; The last AC state of PE is informed through protocol massages by the unified control of the MC-LAG module of CE equipment.
In conjunction with Fig. 4, this specific embodiment realizes that the quick switching of PW dual homed network may further comprise the steps:
Steps A, carry out the deployment (with reference to figure 1) of common PW dual homed network.
Steps A specifically comprises:
Set up the VLL business between A1, PE1 and the PE2, form PW1;
Set up the VLL business between A2, PE1 and the PE3, form PW2;
A3, PE1 form PW dual-homing protection group relation with PW1 and PW2, and PW1 is main, and PW2 is for being equipped with;
A4, PE2, PE3, CE dispose the MC-LAG dual-home network, and AC1 and AC2 are formed protection group relation, and AC1 is main, and AC2 is for being equipped with.
After steps A was accomplished, common PW dual homed network design was accomplished.
PE2 last " service management module ", safeguards " AC transmits module " and " PW transmits module " according to the VLL business configuration.Wherein " AC transmits module " forms AC and transmits (seeing table 1), and " PW transmits module " forms PW and transmit (seeing table 2) "; Under the normal condition, it is forward-path that the flow of PE1-CE is selected " PE1-PE2-CE " according to table 1, table 2, and flow can intercommunication.
| Inlet | Outlet |
| AC1 | PW1 |
Table 1:PE2 device A C transmits
| Inlet | 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 set up physical connection;
B2, PE2 and PE3 are connected and get through route, set up outer layer tunnel;
On B3, PE2 and the PE3, a newly-built new PW is called I-PW on the VLL business, and is tied to I-PW protection group with AC.
After step B accomplished, novel PW dual homed network design was accomplished.
Wherein, " I-PW protects pack module " forms the protection relation with AC1 and I-PW, and acquiescence AC1 is active, and I-PW is standby; " AC transmits module " and " PW transmits module " receives " I-PW protects pack module " influence, has the renewal of forwarding information, sees table 3, table 4.Under the normal condition, it is forward-path that the flow of PE1-CE is selected " PE1-PE2-CE " according to active clauses and subclauses in table 3, the table 4, and flow can intercommunication.
| Inlet | 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 " to carry out protocol massages mutual with CE immediately, and it is standby that the MC-LAG consultation negotiates AC1, and AC2 is active; It is that AC1 is standby that " MC-LAG module " notice " I-PW protects pack module " is upgraded activestandby state, and I-PW is active;
Activestandby state after step D, " I-PW protects pack module " can will be upgraded is notified to " service management module "; Refresh and transmit by " service management module "; Finally " AC transmits module " and " PW transmits module " information is able to upgrade, and sees table 5, table 6; It is forward-path that the flow of PE1-CE is selected " PE1-PE2-PE3-CE " according to active clauses and subclauses in the table 6, and flow can intercommunication;
| Inlet | Outlet |
| AC1 | PW1 |
Table 5:PE2 device A C transmits
Table 6:PE2 equipment PW transmits
So far, after the AC1 link occurs fault, flow switches to be accomplished.
The performance of handoffs analysis: the AC1 link occurs fault, CE and PE2 be perception immediately all, and one side CE can reselect AC2 and carry out flow forwarding, CE effluent amount performance of handoffs T
The CE performance of handoffs=T
The CE fault detect+ T
The CE switching behaviorOn the other hand, PE2 need not " AC1 fault " information is passed to PE1 through oam mapping technology, only needs PE2 to forward flow to the I-PW path here and gets final product, PE2 effluent amount performance of handoffs T
The PE2 performance of handoffs=T
The PE2 fault detect+ T
The PE2 switching behaviorBecause flow depends on the Path selection of both sides, the flow performance of handoffs of whole network is MAX (T
The CE performance of handoffs, T
The PE2 performance of handoffs), reduced T
The PE2 fault deliveryUncontrollable factor, the more common PW dual homed of its performance network handoff technique is greatly improved.
When step e, AC1 link failure recovery, cut strategy because CE adopts WTR to delay time back, " MC-LAG module " carries out alternately with CE at this moment; It is standby that the MC-LAG agreement still can negotiate AC1; AC2 is active, and its state does not change temporarily, and the corresponding state of transmitting still remains unchanged; It is forward-path that flow is still selected " PE1-PE2-PE3-CE ", and flow can intercommunication;
After step F, CE equipment WTR were overtime, it was active that the MC-LAG consultation negotiates AC1 again, and AC2 is standby; Notify " MC-LAG module " to PE2 through protocol massages;
After step G, " MC-LAG module " responded negotiation result, it was that AC1 is active that notice " I-PW protects pack module " is upgraded activestandby state, and I-PW is standby;
Activestandby state after step H, " I-PW protects pack module " can will be upgraded is notified to " service management module "; Refresh and transmit by " service management module "; Finally " AC transmits module " and " PW transmits module " information is able to upgrade, and sees table 7, table 8; It is forward-path that the flow of PE1-CE is selected " PE1-PE2-CE " according to active clauses and subclauses in the table 8, and flow can intercommunication;
| Inlet | Outlet |
| AC1 | PW1 |
Table 7:PE2 device A C transmits
Table 8:PE2 equipment PW transmits
So far, after AC1 link failure recovery and the WTR time-delay, flow returns and cuts.
Return and to cut performance evaluation: during the AC1 link failure recovery, CE and PE2 all can instant perception, but the AC1 state of MC-LAG is still standby, and PE2 and CE temporarily do not handle flow and return and cut, and do not have packet loss at this moment; After the WTR of CE time-delay, the MC-LAG agreement is changed to active again with the AC1 state, and CE can reselect the AC1 converting flow on the one hand, and performance T is cut in its time
CE returns and cuts performance=T
CE returns and cuts row For(behavior of cutting is directly triggered back in WTR time-delay back, therefore need not T
The CE fault detect); On the other hand, after PE2 " MC-LAG module " response negotiation result, refresh again and transmit, reselect AC1 path converting flow, performance T is cut in its time
PE2 returns and cuts performance=T
MC-LAG+ T
PE2 returns the behavior of cuttingBecause flow depends on the Path selection of both sides, the flow performance of handoffs of whole network is MAX (T
CE returns and cuts performance, T
PE2 returns and cuts performance), avoided two ends to carry out separately that WTR handles and inconsistent problem on opportunity is cut in returning of causing, the WTR delay process that only depends on CE equipment is controlled returning of whole network and is cut opportunity, has improved and time has cut performance.
As shown in Figure 5, the embodiment of the invention also provides a kind of dual-homed operator equipment, comprising:
Launch the unit; Be used for when primary link breaks down, when ustomer premises access equipment switches to reserve link with flow; Switch pseudo-line in the middle of launching, it is the pseudo-line of setting up between the subsequent use dual-homed operator equipment in main dual-homed operator equipment and the reserve link that pseudo-line is switched in the centre;
Switch unit is used for that flow is switched pseudo-line in the middle of switching to and transmits.
As shown in Figure 6, above-mentioned dual-homed operator equipment can also comprise:
Return cut unit, be used for flow being delayed time back when cutting to primary link, flow is returned to cut to primary link transmit when primary link failure recovery, ustomer premises access equipment.
As shown in Figure 6 again, above-mentioned dual-homed operator equipment can also comprise:
Connect and to set up the unit, be used for and subsequent use dual-homed operator equipment between set up physical connection and pseudo-line is switched in the centre;
The unit is set, is used for that pseudo-line is switched in primary link and centre and forms the protection relation, will leading pseudo-line and centre, to switch pseudo-line related, when primary link breaks down, when ustomer premises access equipment switches to reserve link with flow, pseudo-line is switched in the centre enable; When primary link failure recovers, ustomer premises access equipment is delayed time back flow when cutting to primary link, pseudo-line is switched in the centre do not enable.
As shown in Figure 6 again, above-mentioned dual-homed operator equipment can also comprise:
The state acquiring unit is used for obtaining through consultation with ustomer premises access equipment the state of primary link and reserve link.
The dual-homed operator equipment that the embodiment of the invention provides has not only improved the network performance of handoffs, has also further improved time to cut performance, has guaranteed stability of network, offers the more perfect service of client.
In addition, the embodiment of the invention also provides a kind of switched system of pseudo-line dual homed network, comprising:
Ustomer premises access equipment is used for when primary link breaks down, flow being switched to reserve link;
The dual-homed operator of master in primary link equipment; Be used for when ustomer premises access equipment switches to reserve link with flow; Flow is switched pseudo-line in the middle of switching to transmit, it is the pseudo-line of setting up between the subsequent use dual-homed operator equipment in main dual-homed operator equipment and the reserve link that pseudo-line is switched in the centre.
Wherein, ustomer premises access equipment also can be used for when primary link failure recovers, and flow is delayed time back cut to primary link;
The dual-homed operator of master in primary link equipment also is used in ustomer premises access equipment flow is delayed time back when cutting to primary link, flow is returned to cut to primary link transmit.
The switched system of the pseudo-line dual homed network that the embodiment of the invention provides has not only improved the network performance of handoffs, has also further improved time to cut performance, has guaranteed stability of network, offers the more perfect service of client.
One of ordinary skill in the art will appreciate that; Realize that all or part of step in the method for the above-mentioned fact is to instruct relevant hardware to accomplish through program; Above-mentioned program can be stored in the storage medium that a computer can read; This program comprises above-mentioned step when carrying out.Above-mentioned storage medium can be ROM/RAM, disk, CD etc.
The above is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from principle according to the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. the changing method of a pseudo-line dual homed network is characterized in that, comprising:
When primary link breaks down, when ustomer premises access equipment switches to reserve link with flow; The dual-homed operator of master in primary link equipment is switched pseudo-line in the middle of launching, and it is the pseudo-line of setting up between the subsequent use dual-homed operator equipment in said master dual-homed operator equipment and the reserve link that pseudo-line is switched in said centre;
The dual-homed operator of said master equipment switches to said centre with flow and switches pseudo-line and transmit.
2. changing method as claimed in claim 1 is characterized in that, also comprises:
When said primary link failure recovers, said ustomer premises access equipment is delayed time back flow when cutting to said primary link, the dual-homed operator of said master equipment returns flow to cut to said primary link and transmits.
3. changing method as claimed in claim 2 is characterized in that, said when primary link breaks down, when ustomer premises access equipment switches to reserve link with flow, the dual-homed operator of the master in primary link equipment is switched before the pseudo-line in the middle of launching, and also comprises:
Set up physical connection between said master dual-homed operator equipment and the said subsequent use dual-homed operator equipment and pseudo-line is switched in said centre;
The dual-homed operator of said master equipment is switched pseudo-line formation protection relation with said primary link and said centre; To lead pseudo-line and said centre, to switch pseudo-line related; When said primary link breaks down, when ustomer premises access equipment switches to reserve link with flow, pseudo-line is switched in said centre enable; When said primary link failure recovers, said ustomer premises access equipment is delayed time back flow when cutting to said primary link, pseudo-line is switched in said centre do not enable.
4. changing method as claimed in claim 3 is characterized in that,
The state of said primary link and reserve link is obtained by said master dual-homed operator equipment and said ustomer premises access equipment through consultation.
5. a dual-homed operator equipment is characterized in that, comprising:
Launch the unit; Be used for when primary link breaks down, when ustomer premises access equipment switches to reserve link with flow; Switch pseudo-line in the middle of launching, it is the pseudo-line of setting up between the subsequent use dual-homed operator equipment in said master dual-homed operator equipment and the reserve link that pseudo-line is switched in said centre;
Switch unit is used for that flow is switched to said centre and switches pseudo-line and transmit.
6. dual-homed operator as claimed in claim 5 equipment is characterized in that, also comprises:
Return cut unit, be used for flow being delayed time back when cutting to said primary link, flow is returned to cut to said primary link transmit when said primary link failure recovery, said ustomer premises access equipment.
7. dual-homed operator as claimed in claim 6 equipment is characterized in that, also comprises:
Connect and to set up the unit, be used for and said subsequent use dual-homed operator equipment between set up physical connection and pseudo-line is switched in said centre;
The unit is set; Be used for said primary link and said centre are switched pseudo-line formation protection relation; To lead pseudo-line and said centre, to switch pseudo-line related, when said primary link breaks down, when ustomer premises access equipment switches to reserve link with flow, pseudo-line is switched in said centre enable; When said primary link failure recovers, said ustomer premises access equipment is delayed time back flow when cutting to said primary link, pseudo-line is switched in said centre do not enable.
8. dual-homed operator as claimed in claim 7 equipment is characterized in that, also comprises:
The state acquiring unit is used for obtaining through consultation with said ustomer premises access equipment the state of said primary link and reserve link.
9. the switched system of a pseudo-line dual homed network is characterized in that, comprising:
Ustomer premises access equipment is used for when primary link breaks down, flow being switched to reserve link;
The dual-homed operator of master in primary link equipment; Be used for when said ustomer premises access equipment switches to reserve link with flow; Flow is switched pseudo-line in the middle of switching to transmit, it is the pseudo-line of setting up between the subsequent use dual-homed operator equipment in said master dual-homed operator equipment and the said reserve link that pseudo-line is switched in said centre.
10. switched system as claimed in claim 9 is characterized in that,
Said ustomer premises access equipment also is used for when said primary link failure recovers, and flow is delayed time back cut to said primary link;
The dual-homed operator of master in said primary link equipment also is used at said ustomer premises access equipment flow being delayed time back when cutting to said primary link, flow is returned to cut to said primary link transmit.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102325037A true CN102325037A (en) | 2012-01-18 |
| CN102325037B CN102325037B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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)
| Country | Link |
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| CN (1) | CN102325037B (en) |
| WO (1) | WO2012159489A1 (en) |
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| CN102325037B (en) | 2016-01-20 |
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