CN100508467C - Method and route equipment for retransmitted layer proxy PIM - Google Patents
Method and route equipment for retransmitted layer proxy PIM Download PDFInfo
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- CN100508467C CN100508467C CNB2007100901281A CN200710090128A CN100508467C CN 100508467 C CN100508467 C CN 100508467C CN B2007100901281 A CNB2007100901281 A CN B2007100901281A CN 200710090128 A CN200710090128 A CN 200710090128A CN 100508467 C CN100508467 C CN 100508467C
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Abstract
The invention discloses a PIM proxy method of forwarding layer wherein the forwarding layer of source direct interconnection designated router stores the received multicast data in the temporary forwarding table entry, obtains the forwarding information corresponding to the multicast data from the router protocol layer, and processes the multicast data in the temporary forwarding table entry based on that whether the PIM message transfering identification exists in the forwarding information; the forwarding layer of convergence router stores the PIM message identification received in the source direct interconnection designated router in the temporary forwarding table entry, ortains the forwarding information of PIM message identification from the router protocol layer, and processes the PIM message identification in the temporary forwarding table entry based on that whether the PIM message receiving identification exists in the forwarding information. The embodiment of the invention reduces the transfer of valid data in the PIM router protocol layer and forwarding layer, realizes the flow control, especially, the invention avoides the unnecessary inter-layer communication in the distributed router and enhances the system performance.
Description
Technical field
The present invention relates to technical field of multicast, relate in particular to the method and the routing device of a kind of retransmitted layer proxy PIM (ProtocolIndependent Multicast, Protocol Independent Multicast).
Background technology
The IP multicast is meant in IP network and packet is sent to the form of Best-effort (transmitting as possible) certain determines the node subclass in the network that this node subclass is called Multicast Group (multicast group).The basic principle of IP multicast is: source host only sends a piece of data, and the destination address in this piece of data is a multicast group address; All recipients in the multicast group can receive same data copy, and have only the main frame in the multicast group, and promptly destination host can receive these data, and other main frame can not receive these data in the network.
The IP multicasting technology has solved single-point effectively and has sent the problem that multiple spot receives, and has realized the efficient data transmission of IP network mid point to multiple spot, in a large number conserve network bandwidth, reduction offered load.As a kind of communication mode arranged side by side with broadcasting with clean culture, multicast can also utilize the multicast feature of network to carry out some new value-added services easily, comprises the information service field of the Internets such as online live, Web TV, long-distance education, tele-medicine, network radio station, real-time video meeting.
PIM-SM (Protocol Independent Multicast-Sparse Mode, Protocol Independent Multicast-Sparse Mode) is a multicast pattern in a kind of territory commonly used, and standard agreement comprises three processes: shared tree is set up, registration stops, reaching shortest path tree.For a certain multicast packet, have three kinds of special router roles respectively: the direct-connected DR in source (Design Router, Designated Router) is and the direct-connected DR in multicast packet source; RP (Rendezvous Point, convergent point) router is this multicast packet service; Receiving terminal DR is the DR direct-connected with receiving terminal.Wherein, the direct-connected DR in source, convergent point router and receiving terminal DR all are the direct-connected DR in source, convergent point router and the receiving terminal DR that refer in particular to a certain multicast packet.
After receiving terminal DR sets up to the shared tree of RP, there is a registration process: when the direct-connected DR in source receives the data of multicast source,, promptly before former data message, add new IP heading and logon message head by adding encapsulation, to convert multicast packet to the PIM logon message, as shown in Figure 1.Wherein, source address is the direct-connected DR interface IP address in source, and destination address is the RP address, and corresponding RP is given in clean culture; After RP received the PIM logon message, first IP heading and logon message head were promptly removed in decapsulation, the reduction multicast packet, and on shared tree, transmit.
With reference to figure 2, for centralized router, the direct-connected Designated Router in source need be delivered to the Routing Protocol layer from transmitting layer with multicast packet, after the Routing Protocol layer is finished encapsulation, by transmitting layer the PIM logon message is transmitted again; The convergent point router is at first delivered to the Routing Protocol layer from transmitting layer with the PIM logon message, after the Routing Protocol layer goes encapsulation, transmits by transmitting layer again.
With reference to figure 3, on distribution router, realize that the above-mentioned process that adds encapsulation and decapsulation all needs message is sent from transmitting layer.And because multicast packet arrives at interface board, need by communication between plate, on send the forwarding layer of master control borad after, send the Routing Protocol layer on again, add encapsulation or decapsulation.Equally, message is through after adding the encapsulation or the processing of decapsulation, and on master control borad, message will be returned by protocol layer and transmit layer, again by communication between plate, turns back to the forwarding layer of interface board from master control borad, sends.
In sum, because the direct-connected Designated Router in source need be finished the forwarding of multicast packet from the data source to the convergent point by the form of logon message, when a large amount of multicast packet is arranged, the performance of system will be influenced greatly.Especially distribution router, the Routing Protocol layer all is present in master control borad; For Designated Router, the Routing Protocol layer that the multicast packet of each business board at first needs to send to master control borad carries out the multicast packet encapsulation, and the multicast packet after will encapsulating then sends to the forwarding layer of business board and transmits; For the convergent point router, the forwarding layer of each business board at first needs the multicast packet of encapsulation is sent to the Routing Protocol layer of master control borad, carry out the decapsulation of multicast packet at the Routing Protocol layer, the forwarding layer that then multicast packet of decapsulation is sent to business board is transmitted.Therefore, no matter be to specify router, or the convergent point router, will there be the mass data message between master control borad and the business board, increased pressure communication.
Summary of the invention
The embodiment of the invention provides a kind of method and routing device of retransmitted layer proxy PIM, to reduce the number of times of muticast data transmission between Routing Protocol layer and the forwarding layer, conserve system resources.
The embodiment of the invention provides the method for the direct-connected Designated Router retransmitted layer proxy PIM of a provenance, comprising:
The direct-connected Designated Router in source is transmitted layer the multicast packet that receives is stored in interim forwarding-table item;
The direct-connected Designated Router in described source is transmitted layer obtains described multicast packet correspondence from the Routing Protocol layer forwarding information;
The direct-connected Designated Router in described source is transmitted layer according to whether there being the PIM of transmission logon message sign that the described multicast packet of storing in the described interim forwarding-table item is handled in the described forwarding information, if the PIM of transmission logon message sign is arranged, then described multicast packet is packaged into the PIM logon message and sends to the convergent point router.
The embodiment of the invention also provides a kind of method of convergent point router retransmitted layer proxy PIM, comprising:
The convergent point router is transmitted the PIM logon message that layer will direct-connected Designated Router receives from the source and is stored in interim forwarding-table item;
Described convergent point router is transmitted layer obtains described PIM logon message correspondence from the Routing Protocol layer forwarding information;
Described convergent point router is transmitted layer according to whether there being the PIM of reception logon message sign that the described PIM logon message of storing in the described interim forwarding-table item is handled in the described forwarding information, if the PIM of reception logon message sign is arranged, then described PIM logon message is descapsulated into multicast packet and transmits.
The embodiment of the invention also provides a kind of method of retransmitted layer proxy PIM, comprising:
The direct-connected Designated Router in source is transmitted layer the multicast packet that receives is stored in interim forwarding-table item;
The direct-connected Designated Router in described source is transmitted layer obtains described multicast packet correspondence from the Routing Protocol layer forwarding information;
The direct-connected Designated Router in described source is transmitted layer according to whether there being the PIM of transmission logon message sign that the described multicast packet of storing in the described interim forwarding-table item is handled in the forwarding information of described multicast packet correspondence, if the PIM of transmission logon message sign is arranged, then described multicast packet is packaged into the PIM logon message and sends to the convergent point router;
The convergent point router is transmitted the PIM logon message that layer will direct-connected Designated Router receives from the source and is stored in interim forwarding-table item;
Described convergent point router is transmitted layer obtains described PIM logon message correspondence from the Routing Protocol layer forwarding information;
Whether described convergent point router is transmitted has the PIM of reception logon message sign that the described PIM logon message of storing in the described interim forwarding-table item is handled in the forwarding information of layer according to described PIM logon message correspondence, if the PIM of reception logon message sign is arranged, then described PIM logon message is descapsulated into multicast packet and transmits.
The embodiment of the invention also provides a provenance direct-connected Designated Router, comprises transmitting layer and Routing Protocol layer, and described forwarding layer and described Routing Protocol layer carry out information interaction, and described forwarding layer comprises:
Interim forwarding-table item unit is used to store the multicast packet that receives;
The forwarding information acquiring unit is used for obtaining from described Routing Protocol layer the forwarding information of described multicast packet correspondence, for the multicast packet encapsulation unit described multicast packet is encapsulated;
Described multicast packet encapsulation unit is used for the described multicast packet of described interim forwarding-table item unit storage is packaged into the PIM logon message;
The logon message transmitting element is used to transmit described PIM logon message.
The embodiment of the invention also provides a kind of convergent point router, comprises transmitting layer and Routing Protocol layer, and described forwarding layer and described Routing Protocol layer carry out information interaction, and described forwarding layer comprises:
Interim forwarding-table item unit is used to store the PIM logon message that receives;
The forwarding information acquiring unit is used for obtaining from described Routing Protocol layer the forwarding information of described PIM logon message correspondence, for PIM logon message decapsulation unit described PIM logon message is carried out decapsulation;
Described PIM logon message decapsulation unit, the reception PIM logon message that is used for carrying according to described forwarding information identifies, and the described PIM logon message decapsulation that described interim forwarding-table item unit is stored becomes multicast packet;
The transmitting multicast data unit is used to transmit described multicast packet.
In the embodiments of the invention, at PIM logon message mechanism, transmit layer at PIM and directly finish the encapsulation of multicast packet or the decapsulation of PIM logon message according to relevant forwarding information, reduce PIM Routing Protocol layer and transmitted data passes number of times and volume of transmitted data between the layer, and can realize flow control; The present invention is particularly useful for distribution router, can effectively avoid communication between non-essential plate in the distribution router, has improved systematic function.
Description of drawings
Fig. 1 is a PIM logon message structure chart in the prior art;
Fig. 2 be in the prior art in the centralized router Routing Protocol layer carry out the information processing schematic diagram;
Fig. 3 be in the prior art in the distribution router Routing Protocol layer carry out the information processing schematic diagram;
Fig. 4 is the method flow diagram of the retransmitted layer proxy PIM of the direct-connected Designated Router of the embodiment of the invention one provenance;
Fig. 5 is the method flow diagram of the retransmitted layer proxy PIM of a kind of convergent point router of the embodiment of the invention;
Fig. 6 is the system construction drawing of a kind of retransmitted layer proxy PIM of the embodiment of the invention.
Embodiment
The embodiment of the invention provides the method for the retransmitted layer proxy PIM of the direct-connected Designated Router of a provenance, as shown in Figure 4, may further comprise the steps:
Step s201, the forwarding layer of the direct-connected Designated Router in source (for centralized router, is transmitted layer and Routing Protocol layer all on interface board; For distribution router, this transmits layer is the forwarding layer of interface board, and the Routing Protocol layer is on master control borad) receiving multicast data.
Step s202, the forwarding layer of the direct-connected Designated Router in source judges whether to exist the forwarding-table item for this multicast packet, if exist, then changes step s203, otherwise changes step s206.
Whether step s203, the forwarding layer of the direct-connected Designated Router in source detect the logon message of transmission sign in this forwarding-table item, if having, then change step s204; Otherwise change step s205.
Step s204, the forwarding layer of the direct-connected Designated Router in source is encapsulated as the PIM logon message according to the convergent point router address in the forwarding-table item with multicast packet, and transmits.
Step s205, the forwarding layer of the direct-connected Designated Router in source is directly transmitted this multicast packet according to the outgoing interface of forwarding-table item.
Step s206, the forwarding layer of the direct-connected Designated Router in source judge whether to exist interim forwarding-table item (promptly negative list item), if exist, then change step s208; Otherwise, change step s207.Wherein, interim forwarding-table item can generate in advance, also can generate in real time after receiving multicast packet.
Step s207, the forwarding layer of the direct-connected Designated Router in source is created interim forwarding-table item, and the incoming interface of this interim forwarding-table item is a physical interface of receiving data, but does not have outgoing interface; Change step s208.
Step s208, the direct-connected Designated Router in source is transmitted layer the multicast packet that receives is stored in interim forwarding-table item.
Step s209, the direct-connected Designated Router in source is transmitted course source direct-connected Designated Router Routing Protocol layer and is sent multicast packet arrival message, this multicast packet arrives message and limits times of reporting by flow control, for example, the time of sending on the recorded information, the time interval of sending on the prescribed information must be carried out the time span of encapsulation process to reporting multicast packet greater than the Routing Protocol layer; And this multicast packet arrives in message and comprises the parameter that multicast packet carries, and for example: source address, destination address is received the interface of data.
Step s210, source direct-connected Designated Router Routing Protocol layer (is the Routing Protocol layer of master control borad for distribution router) generates corresponding forwarding information according to the parameter that this multicast packet carries, send to Designated Router and transmit layer, comprise in this forwarding information: whether the incoming interface of forwarding, outgoing interface need to send logon message sign and corresponding convergent point router address.
Step s211 after source direct-connected Designated Router forwarding layer receives forwarding information, deletes interim list item, creates formal forwarding-table item, and find the multicast packet of this forwarding information correspondence in interim forwarding-table item.
Step s212, the direct-connected Designated Router in source transmit layer and judge whether the logon message of transmission sign is arranged, if having, then change step s213 in this forwarding information; Otherwise, change step s214.
Step s213, the direct-connected Designated Router in source is transmitted layer, according to the convergent point router address in the forwarding-table item multicast packet is packaged into the PIM logon message, transmits this message to the convergent point router then.
Step s214, this router are not the direct-connected Designated Routers in the source of this multicast packet, do not need to send logon message, and the direct-connected Designated Router in source is transmitted layer and directly this multicast packet transmitted.
In the Designated Router of present embodiment, when transmitting at PIM when prestoring relevant forwarding information in the layer, transmitting layer encapsulation that can directly finish multicast packet, do not need to carry out information interaction with PIM Routing Protocol layer, reduce the degree of transitivity of valid data between PIM Routing Protocol layer and the forwarding layer, and can realize flow control; When PIM transmits layer and do not prestore relevant forwarding information, only need obtain relevant forwarding information from PIM Routing Protocol layer in real time, because forwarding information is compared with multicast packet, data volume is much smaller, therefore, reduce PIM Routing Protocol layer and transmitted data quantity transmitted between the layer, saved bandwidth.The present invention is particularly useful for distribution router, can effectively avoid communication between non-essential plate in the distribution router, has improved systematic function.
The embodiment of the invention provides a kind of method of retransmitted layer proxy PIM of convergent point router, as shown in Figure 5, may further comprise the steps:
Step s301, the forwarding layer of convergent point router receive the PIM logon message that sends from the direct-connected Designated Router in source.
Step s302, the forwarding layer of convergent point router judges whether to exist the forwarding-table item for this PIM logon message, if exist, then changes step s303, otherwise changes step s306.
Whether step s303, the forwarding layer of convergent point router detect the logon message of reception sign in this forwarding-table item, if having, then change step s304; Otherwise change step s305.
Step s304, the forwarding layer of convergent point router is descapsulated into multicast packet with the PIM logon message, and transmits.
Step s305, the direct-connected Designated Router in the forwarding course source of convergent point router send registration and stop message, abandon this logon message.
Step s306, the forwarding layer of convergent point router judges whether to exist interim forwarding-table item, if exist, then changes step s308; Otherwise, change step s307.Wherein, interim forwarding-table item can generate in advance, also can generate in real time after receiving multicast packet.
Step s307, the forwarding layer of convergent point router is created interim forwarding-table item, changes step s308.
Step s308, the convergent point router is transmitted layer the PIM logon message that receives is stored in interim forwarding-table item.
Step s309, the convergent point router is transmitted course convergent point router Routing Protocol layer and is sent logon message arrival message, this logon message arrives message and limits times of reporting by flow control, and comprises the parameter that logon message carries in this logon message arrival message.
Step s310, convergent point router Routing Protocol layer generates corresponding forwarding information according to the parameter that this logon message carries, send to the convergent point router and transmit layer, comprise in this forwarding information: the incoming interface of forwarding, outgoing interface and whether need to receive the logon message sign.
Step s311 after convergent point router forwarding layer receives forwarding information, deletes interim list item, creates formal forwarding-table item, and find the PIM logon message of this forwarding information correspondence in interim forwarding-table item.
Step s312, convergent point router transmit layer and judge whether the logon message of reception sign is arranged, if having, then change step s313 in this forwarding information; Otherwise, change step s314.
Step s313, convergent point router transmit layer the decapsulation of PIM logon message are become multicast packet, transmit then.
Step s314, convergent point router transmit layer transmission registration and stop message, abandon the PIM logon message.
In the convergent point router of present embodiment, when transmitting at PIM when prestoring relevant forwarding information in the layer, transmitting layer decapsulation that can directly finish the PIM logon message, do not need to carry out information interaction with PIM Routing Protocol layer, reduce the degree of transitivity of valid data between PIM Routing Protocol layer and the forwarding layer, and can realize flow control; When PIM transmits layer and does not prestore relevant forwarding information, only need to obtain relevant forwarding information from PIM Routing Protocol layer in real time, because forwarding information is compared with the PIM logon message, data volume is much smaller, therefore, reduce PIM Routing Protocol layer and transmitted data quantity transmitted between the layer, saved bandwidth.The present invention is particularly useful for distribution router, can effectively avoid communication between non-essential plate in the distribution router, has improved systematic function.
The embodiment of the invention provides a kind of system of retransmitted layer proxy PIM of convergent point router, as shown in Figure 6, comprises Designated Router 100 and convergent point router two 00, and Designated Router 100 and convergent point router two 00 comprise respectively transmits layer and Routing Protocol layer.
Wherein, the forwarding layer of Designated Router 100 further comprises: interim forwarding-table item unit 101, multicast packet encapsulation unit 102 and logon message transmitting element 103.Interim forwarding-table item unit 101 is used to store the multicast packet that receives, and wherein, interim forwarding-table item unit 101 can generate in advance, also can generate in real time after receiving multicast packet; Multicast packet encapsulation unit 102, be used for the multicast packet of interim forwarding-table item is packaged into the PIM logon message, promptly when the forwarding-table item that gets access to has the logon message of transmission information, the multicast packet of original interim forwarding-table item buffer memory is packaged into logon message, and, all multicast packets of receiving afterwards all are packaged into logon message, deleted by protocol layer up to the information that sends logon message, or forwarding-table item are deleted; Logon message transmitting element 103 is used to transmit the PIM logon message.
The forwarding layer of Designated Router 100 also comprises forwarding information acquiring unit 104, is used for obtaining from the Routing Protocol layer forwarding information of multicast packet correspondence.
The forwarding layer of Designated Router 100 also comprises forwarding information detecting unit 105, and whether have with multicast packet corresponding forwarding information, if do not have, then trigger forwarding information acquiring unit 104 and obtain forwarding information if being used for detecting the forwarding layer.
The forwarding layer of Designated Router 100 also comprises transmission message identification detecting unit 106, be used for detecting forwarding information and whether have the transmission message identification, if exist, trigger then that multicast packet encapsulation unit 102 encapsulates and send the PIM logon messages by logon message retransmission unit 103.
The forwarding layer of convergent point router two 00 further comprises: interim forwarding-table item unit 201, multicast packet decapsulation unit 202 and multicast packet send unit 203.Interim forwarding-table item unit 201 is used to store the PIM logon message that receives, and wherein, interim forwarding-table item unit 201 can generate in advance, also can generate in real time after receiving the PIM logon message; Multicast packet decapsulation unit 202, be used for the PIM logon message decapsulation of interim forwarding-table item is become multicast packet, promptly when the forwarding-table item that gets access to has the PIM of reception logon message sign, PIM logon message decapsulation with original interim forwarding-table item buffer memory, and, all all decapsulations of PIM logon message of receiving afterwards, the information of the multicast packet in transmitting the PIM logon message is deleted by protocol layer, or forwarding-table item is deleted; Transmitting multicast data unit 203 is used for multicast data forwarding.
The forwarding layer forwarding information acquiring unit 204 of convergent point router two 00 is used for obtaining the process information of PIM logon message corresponding protocols layer to this PIM logon message from the Routing Protocol layer.
The forwarding layer forwarding information detecting unit 205 of convergent point router two 00, whether have with PIM logon message corresponding forwarding information, if do not have, then trigger forwarding information acquiring unit 204 and obtain forwarding information if being used for detecting the forwarding layer.
The forwarding layer of convergent point router two 00 receives logon message label detection unit 206, be used for detecting forwarding information and whether have reception logon message sign, if exist, then trigger logon message decapsulation unit 202 and carry out decapsulation, and by transmitting multicast data unit 203 multicast data forwardings.
In the system of the retransmitted layer proxy PIM of present embodiment, at PIM logon message mechanism, when transmitting at PIM when prestoring relevant forwarding information in the layer, can directly finish the encapsulation of multicast packet or the decapsulation of PIM logon message at the forwarding layer, do not need to carry out information interaction with PIM Routing Protocol layer, reduce the degree of transitivity of valid data between PIM Routing Protocol layer and the forwarding layer, and can realize flow control; When PIM transmits layer and does not prestore relevant forwarding information, only need to obtain relevant forwarding information from PIM Routing Protocol layer in real time, because forwarding information is compared with multicast packet/PIM logon message, data volume is much smaller, therefore, reduce PIM Routing Protocol layer and transmitted data quantity transmitted between the layer, saved bandwidth.
When Designated Router is distribution router, transmit layer and be arranged in business board, the Routing Protocol layer is arranged in master control borad, multicast packet is encapsulated as the PIM logon message and transmits at the forwarding layer of business board, the forwarding layer of business board and the Routing Protocol layer of master control borad only need mutual a spot of multicast packet to arrive message and for the forwarding information of this multicast packet; When the convergent point router is distribution router, transmit layer and be arranged in business board, the Routing Protocol layer is arranged in master control borad, the PIM logon message is descapsulated into multicast packet and transmits at the forwarding layer of business board, the forwarding layer of business board and the Routing Protocol layer of master control borad only need mutual a little P IM logon message to arrive message and for the forwarding information of this PIM logon message.Therefore, for distribution router, the embodiment of the invention has reduced communication between non-essential plate, has improved systematic function.In addition, the embodiment of the invention is an example with the PIM logon message, but can be generalized to other PIM protocol massages.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (20)
1, the direct-connected Designated Router of a provenance is transmitted the method for layer proxy Protocol Independent Multicast PIM, it is characterized in that, comprising:
The direct-connected Designated Router in source is transmitted layer the multicast packet that receives is stored in interim forwarding-table item;
The direct-connected Designated Router in described source is transmitted layer obtains described multicast packet correspondence from the Routing Protocol layer forwarding information;
The direct-connected Designated Router in described source is transmitted layer according to whether there being the PIM of transmission logon message sign that the described multicast packet of storing in the described interim forwarding-table item is handled in the described forwarding information, if the PIM of transmission logon message sign is arranged, then described multicast packet is packaged into the PIM logon message and sends to the convergent point router.
2, the method for the direct-connected Designated Router retransmitted layer proxy PIM in source according to claim 1 is characterized in that, the direct-connected Designated Router in described source is transmitted layer and also comprised before the multicast packet that receives is stored in interim forwarding-table item:
After determining do not have forwarding-table item in the direct-connected Designated Router forwarding in the described source layer, judge then the direct-connected Designated Router in described source transmits in the layer whether have interim forwarding-table item, if have, then directly use the direct-connected Designated Router in described source to transmit the interim forwarding-table item that has in the layer, otherwise set up interim forwarding-table item.
3, the method for the direct-connected Designated Router retransmitted layer proxy PIM in source according to claim 1 is characterized in that, the direct-connected Designated Router in described source is transmitted layer and also comprised before the multicast packet that receives is stored in interim forwarding-table item:
After determining in the direct-connected Designated Router forwarding in the described source layer forwarding-table item is arranged, then whether there is the PIM of transmission logon message sign that described multicast packet is handled according to forwarding information in the described forwarding-table item, if the PIM of transmission logon message sign is arranged, then described multicast packet is packaged into the PIM logon message and sends to the convergent point router.
4, as the method for the direct-connected Designated Router retransmitted layer proxy PIM in source as described in each in the claim 1 to 3, it is characterized in that, also comprise:
If do not send PIM logon message sign in the described forwarding information, then described multicast packet directly transmitted.
5, the method for the direct-connected Designated Router retransmitted layer proxy PIM in source according to claim 1 is characterized in that, the direct-connected Designated Router in described source is transmitted layer and specifically comprised from the forwarding information that the Routing Protocol layer obtains described multicast packet correspondence:
The direct-connected Designated Router in described source is transmitted course source direct-connected Designated Router Routing Protocol layer and is sent multicast packet arrival message, and the direct-connected Designated Router in the described source of direct-connected Designated Router Routing Protocol course, described source is transmitted the forwarding information that layer returns described multicast packet correspondence.
6, as the method for the direct-connected Designated Router retransmitted layer proxy PIM in source as described in the claim 5, it is characterized in that the direct-connected Designated Router in described source is transmitted layer and sent the number of times that multicast packet arrives message by the flow control restriction to source direct-connected Designated Router Routing Protocol layer.
7, the method for the direct-connected Designated Router retransmitted layer proxy PIM in source according to claim 1, it is characterized in that, comprise the convergent point router address in the described forwarding information, the direct-connected Designated Router in described source is transmitted layer and is sent described PIM logon message according to described convergent point router address.
8, a kind of method of convergent point router retransmitted layer proxy PIM is characterized in that, comprising:
The convergent point router is transmitted the PIM logon message that layer will direct-connected Designated Router receives from the source and is stored in interim forwarding-table item;
Described convergent point router is transmitted layer obtains described PIM logon message correspondence from the Routing Protocol layer forwarding information;
Described convergent point router is transmitted layer according to whether there being the PIM of reception logon message sign that the described PIM logon message of storing in the described interim forwarding-table item is handled in the described forwarding information, if the PIM of reception logon message sign is arranged, then described PIM logon message is descapsulated into multicast packet and transmits.
As the method for convergent point router retransmitted layer proxy PIM as described in the claim 8, it is characterized in that 9, described convergent point router is transmitted layer and also comprised before the PIM logon message that receives is stored in interim forwarding-table item:
After determining do not have forwarding-table item in the described convergent point router forwarding layer, then judge whether to have interim forwarding-table item, if interim forwarding-table item is arranged, then directly use described convergent point router to transmit the interim forwarding-table item that has in the layer, otherwise set up interim forwarding-table item.
10, as the method for convergent point router retransmitted layer proxy PIM as described in the claim 9, it is characterized in that, described convergent point router forwarding layer also comprises before the PIM logon message that receives is stored in interim forwarding-table item: after determining in the described convergent point router forwarding layer forwarding-table item is arranged, then whether there is the PIM of reception logon message sign that described PIM logon message is handled according to forwarding information in the described forwarding-table item, if the PIM of reception logon message sign is arranged, then described PIM logon message is descapsulated into multicast packet and transmits.
11, as the method for convergent point router retransmitted layer proxy PIM as described in each in the claim 8 to 10, it is characterized in that, also comprise:
If do not receive PIM logon message sign in the described forwarding information, then abandon the described PIM logon message of storing in the interim forwarding-table item, direct-connected Designated Router sends the PIM stopped registration messages to the source.
As the method for convergent point router retransmitted layer proxy PIM as described in the claim 8, it is characterized in that 12, described convergent point router is transmitted layer and specifically comprised from the forwarding information that the Routing Protocol layer obtains described PIM logon message correspondence:
Described convergent point router is transmitted course convergent point router Routing Protocol layer and is sent PIM logon message arrival message, and the described convergent point router of described convergent point router Routing Protocol course is transmitted the forwarding information that layer returns described PIM logon message correspondence.
As the method for convergent point router retransmitted layer proxy PIM as described in the claim 12, it is characterized in that 13, described convergent point router is transmitted layer and sent the number of times that the PIM logon message arrives message by the flow control restriction to convergent point router Routing Protocol layer.
14, a kind of method of retransmitted layer proxy PIM is characterized in that, comprising:
The direct-connected Designated Router in source is transmitted layer the multicast packet that receives is stored in interim forwarding-table item;
The direct-connected Designated Router in described source is transmitted layer obtains described multicast packet correspondence from the Routing Protocol layer forwarding information;
The direct-connected Designated Router in described source is transmitted layer according to whether there being the PIM of transmission logon message sign that the described multicast packet of storing in the described interim forwarding-table item is handled in the forwarding information of described multicast packet correspondence, if the PIM of transmission logon message sign is arranged, then described multicast packet is packaged into the PIM logon message and sends to the convergent point router;
The convergent point router is transmitted layer will be stored in interim forwarding-table item from the described PIM logon message that the direct-connected Designated Router in described source receives;
Described convergent point router is transmitted layer obtains described PIM logon message correspondence from the Routing Protocol layer forwarding information;
Whether described convergent point router is transmitted has the PIM of reception logon message sign that the described PIM logon message of storing in the described interim forwarding-table item is handled in the forwarding information of layer according to described PIM logon message correspondence, if the PIM of reception logon message sign is arranged, then described PIM logon message is descapsulated into multicast packet and transmits.
15, the direct-connected Designated Router of a provenance comprises and transmits layer and Routing Protocol layer that described forwarding layer and described Routing Protocol layer carry out information interaction, it is characterized in that, described forwarding layer comprises:
Interim forwarding-table item unit is used to store the multicast packet that receives;
The forwarding information acquiring unit is used for obtaining from described Routing Protocol layer the forwarding information of described multicast packet correspondence, for the multicast packet encapsulation unit described multicast packet is encapsulated;
Described multicast packet encapsulation unit is used for the described multicast packet of described interim forwarding-table item unit storage is packaged into the PIM logon message;
The logon message transmitting element is used to transmit described PIM logon message.
16, as the direct-connected Designated Router in source as described in the claim 15, it is characterized in that, described forwarding layer also comprises: the forwarding information detecting unit, be used for detecting the forwarding layer whether the forwarding information corresponding with described multicast packet is arranged, if do not have, then trigger described forwarding information acquiring unit and obtain forwarding information.
17, as the direct-connected Designated Router in source as described in the claim 15, it is characterized in that, described forwarding layer also comprises: send the message identification detecting unit, be used for detecting described forwarding information and whether have transmission PIM message identification, if exist, then trigger described logon message transmitting element and send described PIM logon message.
18, a kind of convergent point router comprises and transmits layer and Routing Protocol layer that described forwarding layer and described Routing Protocol layer carry out information interaction, it is characterized in that, described forwarding layer comprises:
Interim forwarding-table item unit is used to store the PIM logon message that receives;
The forwarding information acquiring unit is used for obtaining from described Routing Protocol layer the forwarding information of described PIM logon message correspondence, for PIM logon message decapsulation unit described PIM logon message is carried out decapsulation;
Described PIM logon message decapsulation unit, the reception PIM logon message that is used for carrying according to described forwarding information identifies, and the described PIM logon message decapsulation that described interim forwarding-table item unit is stored becomes multicast packet;
The transmitting multicast data unit is used to transmit described multicast packet.
As convergent point router as described in the claim 18, it is characterized in that 19, described forwarding layer also comprises:
The forwarding information detecting unit, whether have and described PIM logon message corresponding forwarding information, if do not have, then trigger described forwarding information acquiring unit and obtain forwarding information if being used for detecting the forwarding layer.
As convergent point router as described in the claim 18, it is characterized in that 20, described forwarding layer also comprises:
Receive logon message label detection unit, be used for detecting described forwarding information and whether have reception PIM logon message sign,, then trigger the described multicast packet of described transmitting multicast data unit forwards if exist.
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| CN101789869A (en) * | 2009-01-23 | 2010-07-28 | 华为技术有限公司 | Processing method and devices of protocol independent multicast service |
| CN105812266B (en) * | 2014-12-31 | 2018-10-23 | 北京东土科技股份有限公司 | A kind of hardware configuration processing method and processing device of request message |
| CN113489642B (en) * | 2021-07-04 | 2023-05-12 | 芯河半导体科技(无锡)有限公司 | PIM-SM source registration optimization method |
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| CN1503507A (en) * | 2002-11-26 | 2004-06-09 | ��Ϊ��������˾ | Method for realizing registration from multicast source to collection point |
| CN1889448A (en) * | 2006-07-18 | 2007-01-03 | 杭州华为三康技术有限公司 | Method and system for crossing virtual local network group broadcasting under assigned source group broadcasting protocol extraneous group broadcasting mode |
| CN1889525A (en) * | 2006-07-24 | 2007-01-03 | 杭州华为三康技术有限公司 | Network equipment and method for realizing sparse mode protocol unrelated group broadcasting field hierarchy |
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| CN1503507A (en) * | 2002-11-26 | 2004-06-09 | ��Ϊ��������˾ | Method for realizing registration from multicast source to collection point |
| CN1889448A (en) * | 2006-07-18 | 2007-01-03 | 杭州华为三康技术有限公司 | Method and system for crossing virtual local network group broadcasting under assigned source group broadcasting protocol extraneous group broadcasting mode |
| CN1889525A (en) * | 2006-07-24 | 2007-01-03 | 杭州华为三康技术有限公司 | Network equipment and method for realizing sparse mode protocol unrelated group broadcasting field hierarchy |
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