CN102447569B - Protection method for point-to-multipoint multicast service and network equipment - Google Patents
Protection method for point-to-multipoint multicast service and network equipment Download PDFInfo
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Abstract
The invention discloses a protection method for the point-to-multipoint (P2MP) multicast service, which comprises the following steps of: setting network equipment as reserve network equipment; judging whether the corresponding master leaf node equipment or a branch path on which the master leaf node equipment is positioned fails by the network equipment; and when the corresponding master leaf node equipment or the branch path on which the master leaf node equipment is positioned is determined to fail, protecting the multicast service by the network equipment via a protection path. The invention also discloses network equipment. According to the protection method and the network equipment, cost is saved, and the multicast service can be protected by a simple protection path.
Description
Technical field
The present invention relates to the multiprotocol label switching (MPLS in field of network transmission; Multi-Protocol Label Switching) technology; particularly relate to guard method and the network equipment of a kind of point-to-multipoint (P2MP, Point 2 Multiple Point) multicast service.
Background technology
MPLS is a kind of system for rapid data packet switch and route, and it provides the abilities such as target, route, forwarding and exchange for network traffic data.MPLS is mainly used to solve network problem, as networking speed, extensibility, service quality (QoS, Quality of Service) management and traffic engineering.P2MP multicasting technology is a kind of tranmission techniques business being sent to multiple receiving device from single sending ending equipment in MPLS.There is in P2MP multicast transmission network the one way link of fixed-bandwidth, be made up of multiple network equipment with route and/or function of exchange; Wherein, the network equipment be connected with sending ending equipment is called root node apparatus, and the network equipment be connected with receiving device is called leaf node device.
At present, carry out the guard method of multicast service in P2MP multicast transmission network, main exist following two kinds:
Be the guard method based on transfer path 1+1, this guard method is: between root node apparatus and leaf node device, set up two identical paths, and when wherein a paths breaks down, direct open failure path uses another paths.But, this guard method owing to needing to set up a large amount of paths, so bring a large amount of foundation and maintenance cost.
Another kind is 1: 1 guard method of the dual-homing protection technology based on customer side link; this guard method is: between root node apparatus and leaf node device, set up operating path and Protection path respectively; when operating path breaks down, notify that root node apparatus uses Protection path by leaf node device.But this guard method needs to set up reverse link for notifying fault between leaf node device and root node apparatus, then carries out the foundation of Protection path from root node apparatus, so, the complexity that path is set up can be increased.
Visible; the guard method of current existing P2MP multicast service; consume a large amount of network because of needing to set up a large amount of paths and set up cost; the complexity of Protection path is caused setting up owing to setting up reverse link and set up Protection path from root node apparatus, cannot be not only cost-saving but also use simple protection link to realize the protection of multicast service.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of guard method and network equipment of P2MP multicast service, not only cost-saving, but also use simple Protection path to realize the protection of multicast service.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of guard method of point-to-multipoint P2MP multicast service, the method comprises:
Arranging the network equipment is backup network equipment; the described network equipment judges whether corresponding primary leaf node device or primary leaf node device place individual path break down; when determining that the place individual path of corresponding primary leaf node device or primary leaf node device breaks down, the described network equipment utilizes Protection path to protect multicast service.
In such scheme, described judge whether corresponding primary leaf node device or primary leaf node device place individual path break down before, the method also comprises: configuration protection path.
In such scheme, described Protection path is: the client device configuration that the network equipment is served with corresponding primary leaf node device backs up access link, and configures master/slave device Protection path with corresponding primary leaf node device.
In such scheme, describedly judge whether corresponding primary leaf node device or primary leaf node device place individual path break down, and comprising:
The fault detect message that the primary leaf node device that the described network equipment receives correspondence as backup network equipment is sent, situation according to receiving fault detect message judges whether described primary leaf node device breaks down, and judges whether the fault notification that the primary leaf node device receiving correspondence is sent simultaneously;
If primary leaf node device does not break down and do not receive the fault notification that primary leaf node device sends, then determine that primary leaf node device or primary leaf node device place individual path do not break down;
If primary leaf node device breaks down, then judge that primary leaf node device breaks down;
If receive the fault notification that primary leaf node device is sent, then the transfer path being primary leaf node according to fault notification determination fault type breaks down or the access link of primary leaf node breaks down.
In such scheme, the described Protection path that utilizes is protected multicast service, comprising: the network equipment, according to the fault type of primary leaf node device, judges to use backup access link or master/slave device Protection path to protect multicast service.
In such scheme, the described fault type according to primary leaf node device, judges to use backup access link or master/slave device Protection path to protect multicast service, comprising:
If according to fault notification, the network equipment judges that fault type breaks down as the transfer path of primary leaf node, when the network equipment as backup network equipment is the leaf node device in P2MP multicast transmission network, use master/slave device Protection path that multicast service is sent to primary leaf node device; When the network equipment as backup network equipment is not the leaf node device in P2MP multicast transmission network, this network equipment obtains multicast service from the leaf node device P2MP multicast transmission network, uses master/slave device Protection path that multicast service is sent to primary leaf node device;
If according to fault notification, the network equipment judges that fault type breaks down as the access link of primary leaf node, then present networks equipment receives the multicast service that primary leaf node device is sent, and uses backup access link the multicast service received to be sent to the client device of this primary leaf node device service;
If the network equipment judges that primary leaf node device breaks down, when the network equipment is the leaf node device in P2MP multicast transmission network, the receiving device of the primary leaf node device service that the multicast service received by present networks equipment uses backup access link to send to present networks equipment corresponding; If the network equipment judges that primary leaf node device breaks down, and the network equipment is not when being the leaf node device in P2MP multicast transmission network, the described network equipment obtains multicast service from the leaf node device P2MP multicast transmission network, uses backup access link multicast service to be sent to the receiving device of corresponding primary leaf node device service.
Present invention also offers a kind of network equipment, this network equipment comprises: path configurations module, fault detection module and control module; Wherein,
Path configurations module, for receive that control module sends the notice that multicast service is protected time, utilize Protection path to protect multicast service;
Fault detection module, for judging whether corresponding primary leaf node device or primary leaf node device place individual path break down, when determining that corresponding primary leaf node device or primary leaf node device place individual path break down, the primary leaf node device that the primary leaf node device of notice control module is corresponding or primary leaf node device place individual path break down;
Control module; after being set to backup network equipment when the network equipment; after receiving the notice that the primary leaf node device of the correspondence that fault detection module is sent or primary leaf node device place individual path break down, notification path configuration module is protected multicast service.
In such scheme, described path configurations module, also for configuration protection path.
In such scheme, described path configurations module, specifically for backing up access link with the client device configuration that corresponding primary leaf node device is served, and configures master/slave device Protection path with corresponding primary leaf node device.
In such scheme, described fault detection module, specifically for the network information that RX path configuration module is sent, judge whether described primary leaf node device breaks down according to the reception situation of the fault detect message in the network information, judge whether the fault notification that the primary leaf node device receiving correspondence is sent simultaneously, if primary leaf node device does not break down and do not receive the fault notification that primary leaf node device sends, then determine that primary leaf node device or primary leaf node device place individual path do not break down;
If primary leaf node device breaks down, then judge that primary leaf node device breaks down;
If receive the fault notification that primary leaf node device is sent, then the transfer path being primary leaf node according to fault notification determination fault type breaks down or the access link of primary leaf node breaks down.
In such scheme, described control module, specifically for the fault type according to primary leaf node device, judge to use backup access link or master/slave device Protection path to protect multicast service, then notification path configuration module uses backup access link or master/slave device Protection path multicast service to be sent to the receiving device of corresponding primary leaf node device service;
Accordingly, described path configurations module, also to send to the notice of the receiving device of corresponding primary leaf node device service by multicast service for receiving use backup access link or master/slave device Protection path that control module sends.
In such scheme, described control module, if specifically for judging that according to fault notification fault type breaks down as the transfer path of primary leaf node, when the network equipment as backup network equipment is the leaf node device in P2MP multicast transmission network, notification path configuration module uses master/slave device Protection path that multicast service is sent to primary leaf node device; When the network equipment as backup network equipment is not the leaf node device in P2MP multicast transmission network, this notification path configuration module obtains multicast service from the leaf node device P2MP multicast transmission network, uses master/slave device Protection path that multicast service is sent to primary leaf node device;
If judge that fault type breaks down as the access link of primary leaf node according to fault notification, then notification path configuration module receives the multicast service that primary leaf node device is sent, and uses backup access link the multicast service received to be sent to the client device of this primary leaf node device service;
If judge, primary leaf node device breaks down, and the place network equipment is when being the leaf node device in P2MP multicast transmission network, the multicast service received uses backup access link to send to the receiving device of corresponding primary leaf node device service by notification path configuration module; If judge, primary leaf node device breaks down, and the place network equipment is not when being the leaf node device in P2MP multicast transmission network, notification path configuration module obtains multicast service from the leaf node device P2MP multicast transmission network, uses backup access link multicast service to be sent to the receiving device of corresponding primary leaf node device service.
The guard method of P2MP multicast service provided by the present invention and the network equipment, when backup network equipment Inspection goes out corresponding primary leaf node device or primary leaf node device place individual path breaks down, multicast service is protected, so, can avoid setting up the required a large amount of networks consumed of a large amount of Protection paths in a transport network and set up cost; In addition, because the present invention directly can determine whether utilize Protection path to protect multicast service, so, can protect by using simple Protection path to P2MP multicast service by backup network equipment.
Accompanying drawing explanation
Fig. 1 is the guard method schematic flow sheet of P2MP multicast service of the present invention;
Fig. 2 backs up access link schematic diagram one in P2MP multicast transmission network;
Fig. 3 backs up access link schematic diagram two in P2MP multicast transmission network;
Fig. 4 is the composition structural representation of the network equipment of the present invention.
Embodiment
Basic thought of the present invention is: arranging the network equipment is backup network equipment; this network equipment judges whether corresponding primary leaf node device or primary leaf node device place individual path break down; when determining that corresponding primary leaf node device or primary leaf node device place individual path break down, this network equipment utilizes Protection path to protect multicast service.
Below in conjunction with drawings and the specific embodiments, the present invention is further described in more detail.
As shown in Figure 1, the invention provides a kind of guard method of P2MP multicast service, comprise the following steps:
Step 101: when the backup network equipment of any one primary leaf node device during the selected network equipment is as P2MP multicast transmission network, is set to backup network equipment by this network equipment.
Here, the leaf node device that what described selected network equipment can be selected is in P2MP multicast transmission network, may not be the leaf node device in P2MP multicast transmission network;
The described backup network equipment that is set to can comprise: the facility information preserving the facility information of corresponding primary leaf node device and the receiving device of this primary leaf node device service; Wherein, the method arrange the network equipment and the content that will arrange, all perform according to prior art, do not repeat here.
Step 102: network equipment access transmission network, sets up Protection path.
Here, described Protection path comprises: the client device configuration that the network equipment is served with corresponding primary leaf node device backs up access link, and configures master/slave device Protection path with corresponding primary leaf node device;
Wherein, described backup access link is the access link between backup network equipment and corresponding primary leaf node device, can comprise: source node device information, link identification, destination node facility information etc.; The method of described configuration backup access link manually can be set up by operating personnel, also the foundation to backup access link can be realized by using preset routing table in the network equipment, wherein the use of routing table and the table method of building of routing table are prior art realization, do not repeat here;
Described with corresponding primary leaf node device configuration master/slave device Protection path manually can be set up by operating personnel, also can realize by using preset routing table in the network equipment, being prior art, not repeating here.
In this step, the network equipment also performs except backup network functions of the equipments are with the function in outer network in a transport network, the described network equipment in a transport network also can the real-time reception network information, and this network information is sent to the corresponding network equipment, such as, as shown in Figure 2, wherein the network equipment 2 is as the backup network equipment of the network equipment 1, the network equipment 2 is also as a leaf node device in P2MP multicast transmission network simultaneously, the network equipment 2 receives the multicast service that route-exchanging device is sent, and multicast service is sent to corresponding receiving device 2;
Wherein, the information that the every other network equipment that the described network information receives in a transport network for: the network equipment is in is sent.
Step 103: whether the primary leaf node device that network equipment real-time judge is corresponding or primary leaf node device place individual path break down, if all do not break down, then repeated execution of steps 103; Otherwise, perform step 104.
Here, describedly judge whether corresponding primary leaf node device or primary leaf node device place individual path break down and comprise: this network equipment receives the fault detect message that corresponding primary leaf node device is sent, situation according to receiving fault detect message judges whether described primary leaf node device breaks down, and judges whether the fault notification that the primary leaf node device receiving correspondence is sent;
If primary leaf node device does not break down and do not receive the fault notification that primary leaf node device sends, be then judged to be that the link of primary leaf node device and primary leaf node device does not all break down;
If primary leaf node device breaks down, then judge that primary leaf node device breaks down; If receive the fault notification that primary leaf node device is sent, then the transfer path being primary leaf node according to fault notification determination fault type breaks down or the access link of primary leaf node breaks down;
Described transfer path be specify in prior art from root node to this primary leaf node device between path; Described access link is the path between this primary leaf node device and its service client equipment specified in prior art;
Wherein, the generation of described fault detect message and sending method are prior art, can be such as detect continuously and be connected verification (CC & CV, Continutity Check & Connectivity Verification) message; Described fault notification can comprise: fault type and malfunctioning node information etc., and generation and sending method are prior art, do not repeat here.
The described situation according to receiving fault detect message judge described primary leaf node device whether break down for: this network equipment detects whether the all-network information self received is the fault detect message that primary leaf node device is sent, if fault detect message, then record this to receive primary leaf node device and send fault detect message and last time and receive duration between fault detect message that primary leaf node device sends, if this duration exceedes preset duration thresholding, then be judged to be that primary leaf node device breaks down, otherwise be judged to be that primary leaf node device does not break down,
Described duration thresholding is the duration preset according to actual conditions, such as duration thresholding can be predisposed to 3 seconds.
Step 104: the network equipment utilizes Protection path to protect multicast service.
Here; describedly protection is carried out to multicast service be: the described network equipment is according to the fault type of primary leaf node device; judge to use backup access link or master/slave device Protection path to protect multicast service; then backup access link or master/slave device Protection path is used multicast service to be sent to the receiving device of corresponding primary leaf node device service, concrete:
If according to fault notification, the network equipment judges that fault type breaks down as the transfer path of primary leaf node, when the network equipment as backup network equipment is the leaf node device in P2MP multicast transmission network, the multicast service that present networks equipment receives is copied, uses master/slave device Protection path to be sent to by multicast service primary leaf node device, simultaneously present networks equipment multicast service to be sent to the receiving device of present networks device service; When the network equipment as backup network equipment is not the leaf node device in P2MP multicast transmission network, this network equipment obtains multicast service from selected leaf node device, uses master/slave device Protection path that multicast service is sent to primary leaf node device;
If according to fault notification, the network equipment judges that fault type breaks down as the access link of primary leaf node, then present networks equipment receives the multicast service that primary leaf node device is sent, and uses backup access link to be sent to by the multicast service received client device, simultaneously the present networks equipment of this primary leaf node device service multicast service to be sent to the receiving device of present networks device service;
If the network equipment judges that primary leaf node device breaks down, when the network equipment as backup network equipment is the leaf node device in P2MP multicast transmission network, the multicast service that present networks equipment receives is copied, uses backup access link to send to the receiving device of receiving device that present networks equipment is corresponding and primary leaf node device service corresponding to present networks equipment; Such as, as shown in Figure 2, wherein, the network equipment 1 and the network equipment 2 to be all in same P2MP multicast transmission network and to be leaf node device, the network equipment 1 is primary leaf node device, the network equipment 2 is configured to the backup network equipment of the network equipment 1, after the network equipment 2 judges to open backup access link, the multicast service received is sent to the receiving device 2 that present networks equipment is corresponding and receiving device 1 simultaneously; When the network equipment as backup network equipment is not the leaf node device in P2MP multicast transmission network, this network equipment obtains multicast service from selected leaf node device, uses backup access link multicast service to be sent to the receiving device of corresponding primary leaf node device service; Such as, as shown in Figure 3, wherein the network equipment 1 and the network equipment 3 are leaf node device, the backup network equipment that the network equipment 1 is primary leaf node device, the network equipment 2 is configured to the network equipment 1, after the network equipment 2 decision network equipment 1 breaks down, from the multicast service that the network equipment 3 extracts, re-use the receiving device 1 that multicast service sends to the network equipment 1 to serve by backup access link.Wherein, described selected leaf node device can be select according to preset leaf node device information in the network device.
After above-mentioned steps 104 completes, this network equipment as backup network equipment also can judge whether if receive, then to stop the Failure elimination message that the primary leaf node device receiving correspondence is sent protecting multicast service, performs step 103; Otherwise, continue to protect multicast service.
In addition, before whether the primary leaf node device that the real-time judge of the network equipment described in step 103 is corresponding or primary leaf node device place individual path break down, this primary leaf node device also needs to carry out following operation:
Step a: when determining that the network equipment is the primary leaf node device in P2MP multicast transmission network, this network equipment is set to primary leaf node device.
Here, the described network equipment is the leaf node device in P2MP multicast transmission network;
Describedly be set to primary leaf node device and can comprise: the facility information preserving the facility information of corresponding backup network equipment and the receiving device of this primary leaf node device service.
Step b: with corresponding backup network Equipments Setting master/slave device Protection path.
Here, master/slave device Protection path manually can be set up by operating personnel, also can realize by using preset routing table in the network equipment, being prior art, not repeating here.
Step c: when normally performing the task in P2MP multicast transmission network, master/slave device Protection path is used to send fault detect message to the backup network device periodically of correspondence, simultaneously judge whether self place individual path breaks down according to the situation receiving root node apparatus and receiving device and send respectively fault detect message, if break down, then the backup network equipment to correspondence sends fault notification; If fault-free, then continue to perform the task in P2MP multicast transmission network.
Here, described judge self place individual path whether break down for: judge according to receiving the duration that root node apparatus and receiving device send between fault detect message respectively at every turn,
If the duration between the fault detect message that root node apparatus is sent exceedes preset duration thresholding, then judge that self transfer path breaks down, backup network equipment fault type to correspondence is the fault notification that the transfer path of primary leaf node breaks down, after the multicast service that the network equipment receiving correspondence is sent, multicast service is sent to client device;
If the duration between the fault detect message that receiving device is sent exceedes preset duration thresholding, then judge that the access link of self breaks down, backup network equipment fault type to correspondence is the fault notification that the access link of primary leaf node breaks down, and the multicast service self received sends to corresponding backup network equipment.
Described root node apparatus and receiving device send fault detect message respectively can arrange root node apparatus and receiving device for periodically sending, and also can arrange root node apparatus and receiving device periodically sends for when being determined by network management personnel to open fault detection capability.Break down if described, backup network equipment then to correspondence sends after fault notification, also can carry out maintenance eliminating by network management personnel to present networks equipment, once fix a breakdown, then present networks equipment is again as primary leaf node device access P2MP multicast transmission network, and the backup network equipment to correspondence sends Failure elimination message.
Present invention also offers a kind of network equipment, as shown in Figure 4, this network equipment comprises: path configurations module 21, fault detection module 22 and control module 23; Wherein,
Path configurations module 21, for receive that control module 23 sends the notice that multicast service is protected time, utilize Protection path to protect multicast service;
Fault detection module 22, for judging whether corresponding primary leaf node device or primary leaf node device place individual path break down, when determining that corresponding primary leaf node device or primary leaf node device place individual path break down, the primary leaf node device that the primary leaf node device of notice control module 23 is corresponding or primary leaf node device place individual path break down;
Control module 23; after being set to backup network equipment when the network equipment; after receiving the notice that the primary leaf node device of the correspondence that fault detection module 22 is sent or primary leaf node device place individual path break down, notification path configuration module 21 pairs of multicast services are protected.
Described control module 23, also for when the backup network equipment of any one primary leaf node device during the selected place network equipment is as P2MP multicast transmission network, carries out the setting of backup network equipment.
Described control module 23, also for after the place network equipment accesses transmission network, the client device configuration that notification path configuration module 21 is served with corresponding primary leaf node device backs up access link, configures master/slave device Protection path with corresponding primary leaf node device; Accordingly; described path configurations module 21; specifically for after the notice that reception control module 23 is sent, the client device configuration of serving with corresponding primary leaf node device backs up access link, configures master/slave device Protection path with corresponding primary leaf node device.
Described path configurations module 21, also for receiving the network information, and is sent to the network information received in the network equipment corresponding to this network information.
Described path configurations module 21, also sends to fault detection module 22 by the network information while the network information received being sent to the corresponding network equipment; Described fault detection module 22, also for the network information that RX path configuration module 21 is sent.
Described fault detection module 22, the network information specifically for utilizing path configurations module 21 to send judges whether corresponding primary leaf node device or primary leaf node device place individual path break down, if all do not break down, then notify that the link of the primary leaf node device of control module 23 and primary leaf node device does not all break down, otherwise, if primary leaf node device breaks down, then judge that primary leaf node device breaks down, if receive the fault notification that primary leaf node device is sent, the transfer path being then primary leaf node according to fault notification determination fault type breaks down or the access link of primary leaf node breaks down, the transfer path of the notice primary leaf node device of control module 23 or primary leaf node device breaks down or the access link of primary leaf node breaks down, accordingly, described control module 23, the primary leaf node device sent specifically for reception fault detection module 22 and the link of primary leaf node device all do not break down, or after the notice that the transfer path of primary leaf node device or primary leaf node device breaks down or the access link of primary leaf node breaks down, multicast service is protected.
Described fault detection module 22, specifically for the reception situation of the fault detect message of primary leaf node device corresponding in the network information sent according to path configurations module 21, judge whether described primary leaf node device breaks down, judge the fault notification whether having corresponding primary leaf node device to send in the network information that path configurations module 21 is sent simultaneously, if primary leaf node device does not break down and do not receive the fault notification that primary leaf node device sends, be then judged to be that primary leaf node device does not break down; Otherwise, be judged to be that primary leaf node device breaks down.
Described fault detection module 22, specifically for judging whether described primary leaf node device breaks down according to receiving the primary leaf node device duration sent between fault detect message at every turn, if this duration exceedes preset duration thresholding, then be judged to be that primary leaf node device breaks down, otherwise be judged to be that primary leaf node device does not break down.
Described control module 23, during specifically for protecting multicast service, according to the fault type of primary leaf node device, judge to use backup access link or master/slave device Protection path to protect multicast service, then notification path configuration module 21 uses backup access link or master/slave device Protection path multicast service to be sent to the receiving device of corresponding primary leaf node device service; Accordingly, described path configurations module 21, also to send to the notice of the receiving device of corresponding primary leaf node device service by multicast service for receiving use backup access link or master/slave device Protection path that control module 23 sends;
Be specially:
If according to fault notification, described control module 23 judges that fault type breaks down as the transfer path of primary leaf node, when the place network equipment is the leaf node device in P2MP multicast transmission network, the multicast service received copies by notification path configuration module 21, uses master/slave device Protection path to be sent to by multicast service primary leaf node device, simultaneously present networks equipment multicast service to be sent to the receiving device of present networks device service; When the place network equipment is not the leaf node device in P2MP multicast transmission network, notification path configuration module 21 obtains multicast service from selected leaf node device, uses master/slave device Protection path that multicast service is sent to primary leaf node device;
If described control module 23 is sentenced judge that fault type breaks down as the access link of primary leaf node according to fault notification, then notification path configuration module 21 receives the multicast service that primary leaf node device is sent, and uses backup access link the multicast service received to be sent to the client device of this primary leaf node device service, multicast service is sent to the receiving device of present networks device service simultaneously;
If described control module 23 judges that primary leaf node device breaks down, when the network equipment of place backup network equipment is the leaf node device in P2MP multicast transmission network, the multicast service received copies by notification path configuration module 21, uses backup access link to send to the receiving device of receiving device that present networks equipment is corresponding and primary leaf node device service corresponding to present networks equipment; When the network equipment of place backup network equipment is not the leaf node device in P2MP multicast transmission network, notification path configuration module 21 obtains multicast service from selected leaf node device, uses backup access link multicast service to be sent to the receiving device of corresponding primary leaf node device service.
Described path configurations module 21, also for judging whether the Failure elimination message that the primary leaf node device receiving correspondence is sent, if receive, then sends to control module 23 by Failure elimination message, otherwise, do not operate; Accordingly, described control module 23, after the Failure elimination message also sent for RX path configuration module 21, stops protecting multicast service.
Described control module 23, also for when determining that the place network equipment is the primary leaf node device in P2MP multicast transmission network, carry out primary leaf node device setting and preserve primary leaf node device configuration information, notification path configuration module 21 and corresponding backup network Equipments Setting master/slave device Protection path; Accordingly, described path configurations module 21, also that control module 23 sends with notice that is corresponding backup network Equipments Setting master/slave device Protection path for receiving, with corresponding backup network Equipments Setting master/slave device Protection path.
Described control module 23, also for when the place network equipment is as primary leaf node device, sets up after detecting link, and notice fault detection module 22 periodically sends fault detect message to path configurations module 21; Accordingly, described fault detection module 22, the periodicity also sent for receiving control module 23 sends the notice of fault detect message, periodically sends fault detect message to path configurations module 21; Described path configurations module 21, also for after receiving fault detect message that fault detection module 22 sends, sends to corresponding backup network equipment by fault detect message.
Described fault detection module 22, also judge whether self place individual path breaks down for the situation of fault detect message in the network information sent according to path configurations module 21, if break down, then the backup network equipment to correspondence sends fault notification, if fault-free, then do not operate;
Wherein, the described situation according to receiving fault detect message judge the link of self whether break down for: send duration judgement between fault detect message respectively according to receiving root node apparatus and receiving device at every turn, if the duration between the fault detect message that root node apparatus is sent exceedes preset duration thresholding, then judge that self transfer path breaks down, the backup network equipment fault type to correspondence is the fault notification that the transfer path of primary leaf node breaks down; If the duration between the fault detect message that receiving device is sent exceedes preset duration thresholding, then judge that the access link of self breaks down, backup network equipment fault type to correspondence is the fault notification that the access link of primary leaf node breaks down, and the multicast service self received sends to corresponding backup network equipment.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (8)
1. a guard method for point-to-multipoint P2MP multicast service, is characterized in that, the method comprises:
Arranging the network equipment is backup network equipment, the described network equipment judges whether corresponding primary leaf node device or primary leaf node device place individual path break down, when determining that the place individual path of corresponding primary leaf node device or primary leaf node device breaks down, the described network equipment utilizes Protection path to protect multicast service;
Describedly judge whether corresponding primary leaf node device or primary leaf node device place individual path break down, comprise: the fault detect message that the primary leaf node device that the described network equipment receives correspondence as backup network equipment is sent, situation according to receiving fault detect message judges whether described primary leaf node device breaks down, and judges whether the fault notification that the primary leaf node device receiving correspondence is sent simultaneously; Wherein,
The described Protection path that utilizes is protected multicast service, comprising:
If according to fault notification, the network equipment judges that fault type breaks down as the transfer path of primary leaf node, when the network equipment as backup network equipment is the leaf node device in P2MP multicast transmission network, use master/slave device Protection path that multicast service is sent to primary leaf node device; When the network equipment as backup network equipment is not the leaf node device in P2MP multicast transmission network, this network equipment obtains multicast service from the leaf node device P2MP multicast transmission network, uses master/slave device Protection path that multicast service is sent to primary leaf node device;
If according to fault notification, the network equipment judges that fault type breaks down as the access link of primary leaf node, then present networks equipment receives the multicast service that primary leaf node device is sent, and uses backup access link the multicast service received to be sent to the client device of this primary leaf node device service;
If the network equipment judges that primary leaf node device breaks down, when the network equipment is the leaf node device in P2MP multicast transmission network, the client device of the primary leaf node device service that the multicast service received by present networks equipment uses backup access link to send to present networks equipment corresponding; If the network equipment judges that primary leaf node device breaks down, and the network equipment is not when being the leaf node device in P2MP multicast transmission network, the described network equipment obtains multicast service from the leaf node device P2MP multicast transmission network, uses backup access link multicast service to be sent to the client device of corresponding primary leaf node device service.
2. method according to claim 1, is characterized in that, described judge whether corresponding primary leaf node device or primary leaf node device place individual path break down before, the method also comprises: configuration protection path.
3. method according to claim 1 and 2, is characterized in that, described Protection path is:
The backup access link of the client device configuration that the network equipment is served with corresponding primary leaf node device, and the master/slave device Protection path configured with corresponding primary leaf node device.
4. method according to claim 1 and 2, is characterized in that, describedly judges whether corresponding primary leaf node device or primary leaf node device place individual path break down, and comprise further:
If primary leaf node device does not break down and do not receive the fault notification that primary leaf node device sends, then determine that primary leaf node device or primary leaf node device place individual path do not break down;
If primary leaf node device breaks down, then judge that primary leaf node device breaks down;
If receive the fault notification that primary leaf node device is sent, then the transfer path being primary leaf node according to fault notification determination fault type breaks down or the access link of primary leaf node breaks down.
5. a network equipment, is characterized in that, this network equipment comprises: path configurations module, fault detection module and control module; Wherein,
Path configurations module, for receive that control module sends the notice that multicast service is protected time, utilize Protection path to protect multicast service;
Fault detection module, for the network information that RX path configuration module is sent, judge whether primary leaf node device breaks down according to the reception situation of the fault detect message in the network information, judge whether the fault notification that the primary leaf node device receiving correspondence is sent simultaneously, judge whether corresponding primary leaf node device or primary leaf node device place individual path break down, when determining that corresponding primary leaf node device or primary leaf node device place individual path break down, the primary leaf node device that the primary leaf node device of notice control module is corresponding or primary leaf node device place individual path break down,
Control module, after being set to backup network equipment when the network equipment, after receiving the notice that the primary leaf node device of the correspondence that fault detection module is sent or primary leaf node device place individual path break down, notification path configuration module is protected multicast service; Wherein,
Described control module, if specifically for judging that according to fault notification fault type breaks down as the transfer path of primary leaf node, when the network equipment as backup network equipment is the leaf node device in P2MP multicast transmission network, notification path configuration module uses master/slave device Protection path that multicast service is sent to primary leaf node device; When the network equipment as backup network equipment is not the leaf node device in P2MP multicast transmission network, this notification path configuration module obtains multicast service from the leaf node device P2MP multicast transmission network, uses master/slave device Protection path that multicast service is sent to primary leaf node device;
If judge that fault type breaks down as the access link of primary leaf node according to fault notification, then notification path configuration module receives the multicast service that primary leaf node device is sent, and uses backup access link the multicast service received to be sent to the client device of this primary leaf node device service;
If judge, primary leaf node device breaks down, and the place network equipment is when being the leaf node device in P2MP multicast transmission network, the multicast service received uses backup access link to send to the client device of corresponding primary leaf node device service by notification path configuration module; If judge, primary leaf node device breaks down, and the place network equipment is not when being the leaf node device in P2MP multicast transmission network, notification path configuration module obtains multicast service from the leaf node device P2MP multicast transmission network, uses backup access link multicast service to be sent to the client device of corresponding primary leaf node device service.
6. the network equipment according to claim 5, is characterized in that,
Described path configurations module, also for configuration protection path.
7. the network equipment according to claim 6, is characterized in that,
Described path configurations module, specifically for backing up access link with the client device configuration that corresponding primary leaf node device is served, and configures master/slave device Protection path with corresponding primary leaf node device.
8. the network equipment according to claim 5, is characterized in that,
Described fault detection module, is further used for:
If primary leaf node device does not break down and do not receive the fault notification that primary leaf node device sends, then determine that primary leaf node device or primary leaf node device place individual path do not break down;
If primary leaf node device breaks down, then judge that primary leaf node device breaks down;
If receive the fault notification that primary leaf node device is sent, then the transfer path being primary leaf node according to fault notification determination fault type breaks down or the access link of primary leaf node breaks down.
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| CN105490935A (en) * | 2015-12-08 | 2016-04-13 | 国网浙江省电力公司宁波供电公司 | Method and system for analyzing paths among multiple points |
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| CN1946040A (en) * | 2006-10-13 | 2007-04-11 | 华为技术有限公司 | Protective method and device for multicast service |
| CN101656679A (en) * | 2009-09-25 | 2010-02-24 | 华为技术有限公司 | Method for rapidly converging multicast, router and communication system |
| CN101674199A (en) * | 2009-09-22 | 2010-03-17 | 中兴通讯股份有限公司 | Method for realizing switching during network fault and finders |
| CN102195848A (en) * | 2010-03-10 | 2011-09-21 | 中兴通讯股份有限公司 | Multicast service stream protection realization method, device and system |
| WO2011144088A2 (en) * | 2011-05-26 | 2011-11-24 | 华为技术有限公司 | Method for service protection and access device |
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| CN1946040A (en) * | 2006-10-13 | 2007-04-11 | 华为技术有限公司 | Protective method and device for multicast service |
| CN101674199A (en) * | 2009-09-22 | 2010-03-17 | 中兴通讯股份有限公司 | Method for realizing switching during network fault and finders |
| CN101656679A (en) * | 2009-09-25 | 2010-02-24 | 华为技术有限公司 | Method for rapidly converging multicast, router and communication system |
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