CN101394342B - Method and apparatus for implementing multicast authentication - Google Patents
Method and apparatus for implementing multicast authentication Download PDFInfo
- Publication number
- CN101394342B CN101394342B CN200710154643A CN200710154643A CN101394342B CN 101394342 B CN101394342 B CN 101394342B CN 200710154643 A CN200710154643 A CN 200710154643A CN 200710154643 A CN200710154643 A CN 200710154643A CN 101394342 B CN101394342 B CN 101394342B
- Authority
- CN
- China
- Prior art keywords
- multicast
- outlet
- address
- corresponding relation
- message
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/16—Multipoint routing
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The embodiment of the invention discloses a method for realizing multicast communication, which comprises an entry provider edge (PE) router receives multicast data; the entry PE router determines exit PE routers matching with the multicast data in accordance with the multicast addresses of the multicast data and the corresponding relations of the multicast addresses and the corresponding exit PE routers, wherein the correlation relations are set up in the entry PE router; and the entry PE router packages the multicast data by use of the addresses of the determined exit PE routers, and sends the packed multicast data to the determined exit PE routers through an intermediate transmission network in unicast way. The embodiment of the invention also discloses a device for realizing multicast communication. The method and the device provided in the embodiment of the invention can realize multicast communication by using multicast transition technology when the intermediate transmission network does not support multicast protocols, so as to dispense with the need for a large number of routers in the intermediate transmission network all supporting the multicast protocols, thereby reducing implementation cost.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to the method and apparatus of realizing multicast transmission.
Background technology
Current; Continuous increase along with network service user quantity; The network of the 4th traditional generation Internet protocol (IPv4) can't provide enough address space to supply the user to use, and is just developed rapidly thus based on the next generation network of the 6th generation Internet protocol (IPv6).Yet; Because the IPv4 network has had suitable scale; And current most of application program all is based on the IPv4 network and designs, uses, and therefore, the IPv4 network will inevitably be in long-term existence still from now on; Thus, currently formed the transition stage that traditional I Pv4 network and follow-on IPv6 network progressively merge.In this transition stage, along with the IPv6 network is discarded by progressively as the foundation gradually and the IPv4 network of backbone network, some IPv4 networks will occur and not be communicated with mutually, need carry out interconnected situation through the IPv6 transmission network of centre; Certainly, also can occur some IPv6 networks accordingly and not be communicated with mutually, need carry out interconnected situation through the IPv4 transmission network of centre.Will occur this moment: as the employed agreement (I-IP of intermediate conveyor net that is communicated with a plurality of peripheral client's bridge beams; Intra Network Internet Protocol) nets employed agreement (E-IP with peripheral client; Extra Network Internet Protocol) difference; That is to say, I-IP can occur and be IPv4 and E-IP is IPv6 or I-IP is IPv6 and E-IP is the situation of IPv4.Net employed agreement when different intermediate conveyor net and peripheral client, can cause different peripheral client's nets to be difficult to the problem that intercoms mutually through the intermediate conveyor net.
In order to solve the problem that above-mentioned transition stage might occur; Multicast transitional technology based on address translation has been proposed in the prior art; This technological basic thought is: at inlet provider edge (PE) router place; The multicast of E-IP control message and multicast data message are translated as I-IP multicast control message and multicast data message respectively, and wherein, pe router is transmission network and the peripheral client edge router between netting that mediates; Then, the I-IP multicast message after pe router will be translated when this message arrives the outlet PE router, is reduced to corresponding E-IP multicast message with this message in the I-IP transmission through network again, and this message is continued in the E-IP network, to transmit.Through with the I-IP multicast message after the said translation in the I-IP transmission through network, can on transmission network provider (P) router of I-IP network, set up I-IP multicast tree into E-IP muticast data transmission service.The multicast tree of an E-IP is corresponding I-IP multicast tree in the I-IP network, and these two multicast tree come down to the different expression form that multicast tree appears in the network of different agreement.Wherein, the consolidation form of prearrange is adopted in described translation, makes each PE all can discern, thereby need not to consult each other between each PE again.
Be described in detail in the face of above-mentioned translation process down.For example; When the agreement of middle transmission network operation is that IPv6 and the agreement of peripheral client's network operation are when being IPv4; The form of translation is as shown in Figure 1, and wherein, IPv6prefx is a specific I Pv6 address prefix; So that after pe router receives the IPv6 address of this prefix, can give corresponding recovery module and handle.This specific address prefix can obtain through address assignment, also can be by ISP (ISP) internal unity configuration, and the process of said translation and reduction is following:
Translation: to the destination network addresses part in IPv4 clean culture or the multicast routing table, shape such as a.b.c.d/M, wherein M is the bit length of mask.Can be transformed to pseudo-IPv6 address: 4over6prefix:a.b.c.d/len+M according to the 4over6 map addresses.Wherein, 4over6prefix/len is the proprietary prefix in pseudo-IPv6 address, and length is len, and the proprietary prefix in this puppet IPv6 address can obtain through address assignment, also can distributed voluntarily and is managed by an ISP, so that all PE need not to consult just can discern.
Reduction: the 4over6 border router uses the proprietary prefix 4over6prefix/len in pseudo-IPv6 address that destination address is carried out prefix matching; If the prefix in the len prefix length is identical; Judge that then this IPv6 route is pseudo-IPv6 route, and then carry out the route reduction according to the inverse transformation of 4over6 route conversion.
Though above-mentioned multicast transitional technology can be under I-IP and E-IP condition of different; Realize that peripheral client Netcom crosses the intermediate conveyor net and carry out network service; But this technology only can be applied to the situation that the intermediate conveyor net is supported unicast data transmission, carries out multicast transmission through the intermediate conveyor net if desired; The all-router that then needs to comprise in the intermediate conveyor net pe router and a large amount of P router is all supported multicast protocol; And in practical application, often owing to aspects such as fund, manpower, technology, the middle P router in the intermediate conveyor net is not supported multicast protocol; Thereby make the multicast transitional technology under the intermediate conveyor net is not supported the situation of multicast protocol, not to be able to use, and then cause and to realize that under I-IP and E-IP condition of different peripheral client Netcom crosses the intermediate conveyor net and carry out multicast transmission.
In addition; In above-mentioned prior art; Cross the intermediate conveyor net and carry out network service in order under I-IP and E-IP condition of different, also to realize peripheral client Netcom; Need carry out the translation of different network protocol, when the E-IP protocol type is IPv4 and I-IP protocol type when being IPv6, become the IPv6 address of I-IP more or less freely the IPv4 address translation of E-IP; Because the IPv6 address has 128, can combine to constitute jointly one 128 pseudo-IPv6 address by 32 IPv4 address and one 96 specific IPv6 prefix during translation; But; When the E-IP protocol type is that IPv6 and I-IP protocol type are when being IPv4; Because the IPv6 address is 128 and the IPv4 address is 32,, or be the specific territory of protocol massages increase only if add address negotiation mechanism between complicated PE; Otherwise can't 128 IPv6 address translation be become 32 IPv4 address, thereby cause this technical scheme to implement more complicated.In addition; Because translation and reduction need be followed the rule of formulating in advance; And; The route of I-IP multicast control message in the I-IP network that is obtained by E-IP translation need add extra addressing mechanism, and the middle P router of I-IP transmission network also need correspondingly be supported this addressing mechanism, and these also all are that the realization of above-mentioned prior art has brought very big realization difficulty.
Summary of the invention
The purpose of the embodiment of the invention is: the method and apparatus of realizing multicast transmission is provided, even so that do not support under the situation of multicast protocol at the intermediate conveyor net, also can utilizes the multicast transitional technology to realize multicast transmission.
For realizing the foregoing invention purpose, the embodiment of the invention provides following technical scheme:
A kind of method that realizes multicast transmission, this method comprises:
Inlet provider edge PE receiving multicast data;
Said entry PE is confirmed each outlet PE that is complementary with said multicast packet according to the multicast address of said multicast packet and the corresponding relation of multicast address of on himself, setting up and corresponding outlet PE;
Said entry PE is utilized the address of determined said each outlet PE, said multicast packet is encapsulated respectively, and each multicast packet after will encapsulating is sent to determined said each outlet PE with mode of unicast through the intermediate conveyor net respectively.
A kind of device of realizing multicast transmission, this device comprises: peripheral client nets transport module, peripheral client nets processing module, intermediate conveyor net processing module, intermediate conveyor net transport module, multicast forwarding corresponding relation memory module, wherein:
Said peripheral client nets transport module and is used for: receive peripheral client and net the multicast packet that client is sent, and this multicast packet is sent to said peripheral client nets processing module;
Said peripheral client nets processing module and is used for: when confirming that the multicast packet that obtains being received needs that transmission network is transmitted between span centre, this multicast packet is sent to said intermediate conveyor net processing module;
Said intermediate conveyor net processing module is used for: the multicast address of storing according to the multicast address and the said multicast forwarding corresponding relation memory module of said multicast packet and the corresponding relation of outlet PE; Definite each outlet PE that is complementary with said multicast packet; And; Utilize the address of determined said each outlet PE, said multicast packet is encapsulated respectively;
Said intermediate conveyor net transport module is used for: each multicast packet with after the encapsulation of intermediate conveyor net processing module is sent to determined said each outlet PE with mode of unicast through the intermediate conveyor net respectively.
It is thus clear that; In embodiments of the present invention, through the multicast address on entry PE, set up and the corresponding relation of corresponding outlet PE, can confirm its required corresponding outlet PE that sends to the multicast packet of current required transmission; And multicast packet is encapsulated according to the outlet PE of confirming; The multicast packet of this encapsulation is sent to described outlet PE with mode of unicast respectively, thereby make and do not support under the situation of multicast protocol, also can utilize the multicast transitional technology to realize multicast transmission at the intermediate conveyor net; And in concrete implementation procedure; Only need be positioned at the pe router support multicast mechanism that intermediate conveyor net and peripheral client net network edge, not need the middle a large amount of P router of intermediate conveyor net all to support multicast protocol, thereby make that this scheme more is prone to realize and can better reduce the realization cost.
In addition, owing in the implementation procedure of the embodiment of the invention, need not to carry out the translation of different network protocol address, make that also the realization of the embodiment of the invention is simpler, thereby help the rapid popularization of multicast service.
Description of drawings
Fig. 1 shows the format translation that is adopted when carrying out the different network protocol translation in the prior art;
Fig. 2 is the method flow diagram of one embodiment of the invention;
Fig. 3 is for being implemented in the flow chart of the corresponding relation of setting up said multicast address and corresponding outlet PE on the entry PE in one embodiment of the invention;
Fig. 4 is for being implemented in the flow chart of deleting the corresponding relation of said multicast address and corresponding outlet PE on the entry PE in one embodiment of the invention;
Fig. 5 is the schematic representation of apparatus that the embodiment of the invention provided.
Embodiment
Below, in conjunction with accompanying drawing the embodiment of the invention is described in detail.
Referring to Fig. 2, in an embodiment of the present invention, realize that multicast transmission may further comprise the steps:
Step 201: inlet provider edge (PE) receiving multicast data;
Step 202: said entry PE is confirmed each outlet PE that is complementary with said multicast packet according to the multicast address of said multicast packet and the corresponding relation of multicast address of on himself, setting up and corresponding outlet PE;
Step 203: said entry PE is utilized the address of determined said each outlet PE, said multicast packet is encapsulated respectively, and each multicast packet after will encapsulating is sent to determined said each outlet PE with mode of unicast through the intermediate conveyor net respectively.
In the preferred embodiment of the present invention, after said each outlet PE receives said multicast packet, also can be further the multicast packet of this encapsulation be carried out decapsulation, and the multicast packet that obtains after the decapsulation is further transmitted, until accomplishing transfer of data.
Wherein, entry PE adopts the multicast forwarding item to preserve, safeguard the corresponding relation of said multicast address and each outlet PE, for describing conveniently, in following examples, is that example is explained the method that the embodiment of the invention was provided with the multicast forwarding item all; Certainly, in other embodiment of the present invention, also can adopt other modes to preserve, safeguard the corresponding relation of said multicast address and outlet PE set, not influence realization of the present invention.
More clear in order to describe; Below in conjunction with instantiation; Client to peripheral client's net adds multicast group, withdraws from the situation of multicast group, and the corresponding relation of to how being implemented on the entry PE setting up, delete said multicast address and outlet PE specifies, wherein; Described inlet, outlet all are the flow directions to muticast data transmission, be not when setting up, safeguarding said corresponding relation message flow to.
(1) client of peripheral client's net adds multicast group:
Referring to Fig. 3, in an embodiment of the present invention, add under the situation of multicast group in the client that peripheral client nets, be implemented in the corresponding relation of setting up said multicast address and corresponding outlet PE on the entry PE and may further comprise the steps:
Step 301: the peripheral client that request adds multicast group nets client, adds (join) message through peripheral client's net to the request with its outlet PE that directly links to each other transmission E-IP form; Wherein, carry multicast address during this join message carries, this multicast address comprise said client the multicast source in the multicast group that will add the address, with and the address of the multicast group that will add; For explaining conveniently, (wherein, s represents the address of said multicast source for s, g) the said join message of expression, and g representes the address of said multicast group with join;
Step 302: the address s that said outlet PE confirms to obtain said multicast source based on unicast routing table is arranged in the E-IP network islands that entry PE connected of the intermediate conveyor net other end; With said join (s; G) the I-IP address with this outlet PE encapsulates, and the message after will encapsulating is sent to the entry PE of the said other end through the intermediate conveyor net with mode of unicast;
Step 303: said entry PE receive join after the encapsulation (s, g) message carry out decapsulation to this message, and according to the multicast address in this message (s, g) handle as follows:
If there has been said join (s; G) multicast address (s in; G) with the corresponding relation of corresponding outlet PE; Then the information with the said outlet PE that obtains after the decapsulation is increased in the corresponding relation of said multicast address and corresponding outlet PE, thereby sets up the corresponding relation that this request adds pairing outlet PE of multicast group client and multicast address; When adopting the multicast forwarding item to preserve said corresponding relation; Above-mentioned processing should be mutually: had said join (s if judge; G) multicast address in (s, g) corresponding multicast forwarding item entry ((s, g); PE}), the PE set that then the I-IP address of the said outlet PE that obtains after the decapsulation is increased to this forwarding entry is { among the PE};
If current do not exist said join (s, (s g) with the corresponding relation of corresponding outlet PE, then sets up this corresponding relation to the multicast address in g) on said entry PE; When adopting the multicast forwarding item to preserve said corresponding relation, above-mentioned processing should be mutually: if corresponding to said join (s, the multicast address (s in g); G), there is not corresponding with it multicast forwarding item, then on said entry PE, sets up and multicast address (s; G) multicast forwarding item the entry ((s of correspondence; G), and PE}), and with this multicast forwarding item PE set { the I-IP address among the PE} is initialized as the I-IP address of said outlet PE.
Further, when the client of peripheral client's net added multicast group, the embodiment of the invention also can further comprise the steps:
(s, g) message continues to be transmitted to next jumping client edge (CE) router to said entry PE, further accomplishes the registration process that said client adds multicast group by this ce router with said join.
(2) client of peripheral client's net withdraws from multicast group:
Referring to Fig. 4, in an embodiment of the present invention, the client-requested of netting peripheral client withdraws under the situation of multicast group, is implemented in the corresponding relation of deleting said multicast address and corresponding outlet PE on the entry PE and may further comprise the steps:
Step 401: the peripheral client that multicast group is withdrawed from request nets client, through peripheral client's net to withdrawing from (quit) message with the request of its outlet PE that directly links to each other transmission E-IP form; Carry equally in this message and the similar multicast address of join message, this request withdraw from message be expressed as quit (s, g);
Step 402: the address s that said outlet PE confirms to obtain said multicast source based on unicast routing table is arranged in the E-IP network islands that entry PE connected of the intermediate conveyor net other end; With said quit (s; G) the I-IP address with this outlet PE encapsulates, and the message after will encapsulating is sent to the entry PE of the said other end through the intermediate conveyor net with mode of unicast;
Step 403: said entry PE receive quit after the encapsulation (s, g) message carry out decapsulation to this message, according to the multicast address in this message (s, g) handle as follows:
Search and obtain said quit (s; G) multicast address in (delete the information of the said outlet PE that obtains after the decapsulation in this corresponding relation by s, the g) corresponding relation of pairing multicast address and outlet PE; When adopting the multicast forwarding item to preserve said corresponding relation, above-mentioned processing should be mutually:
Search and obtain said quit (s; G) multicast address (s in; G) pairing multicast forwarding item entry ((s, g), PE}); The I-IP address of the said outlet PE that obtains after the decapsulation { is deleted the PE}, thereby deleted the corresponding relation that pairing outlet PE of multicast group client and multicast address are withdrawed from this request from the PE set of this forwarding entry; Further, if behind the I-IP address of the said outlet PE of PE set deletion, this PE set is empty set, then also can further delete said multicast forwarding item entry ((s, g), PE}), to save the memory space of PE.
In addition, in actual applications,, can safeguard in different ways for the corresponding relation of multicast address and corresponding outlet PE, below, be example to preserve said corresponding relation by the multicast forwarding item, three kinds of modes safeguarding corresponding relation are illustrated:
Mode one:
For each multicast address (s, g) a separately corresponding multicast forwarding item entry ((s, g), PE}), at this moment, any outlet PE can not receive not one's own data, still, this kind mode need be safeguarded more multicast forwarding item on entry PE;
Mode two:
Some a plurality of multicast address with common trait share a polymerization multicast forwarding item entry ((
*, g
*), PE}).A plurality of multicast address are shared under the situation of multicast forwarding item of same polymerization, need not (s g) safeguards an entry ((s separately for each; G), PE}), and be to use polymerization technique; Make the different (s that a plurality of characteristics are identical; G) share an entry, thereby the number of the multicast forwarding item that the minimizing pe router need be safeguarded has reduced the router burden.Wherein, the common trait that a plurality of multicast address have can for: the prefix of g address is identical, the prefix of s address is identical, certainly, also can be other common trait, does not influence realization of the present invention.
In this case, in above-mentioned steps 202, said entry PE according to the multicast address of multicast packet (s, g), confirm the pairing polymerization multicast forwarding of this multicast address item entry ((
*, g
*), PE}), and { each PE among the PE} confirms as the said outlet PE that is complementary with multicast packet will to transmit a PE set; Thus, join multicast address (s, g) outlet PE of corresponding multicast group possibly receive entry PE issue join other multicast address (s '; G ') multicast packet of the outlet PE of corresponding multicast group, wherein, said (s '; G ') and (s g) has common characteristic, share same entry ((
*, g
*), PE}), thus join group (s, g) with the different outlet PE of (s ', g ') can receive all about (
*, g
*) data, outlet PE transmits to judge whether the multicast packet of receiving is redundant data according to the PIM of E-IP after receiving multicast packet, if then abandon this multicast packet.
Similarly; Safeguard the multicast forwarding item if adopt this mode; Then set up, during the corresponding relation of the said multicast address of deletion and corresponding outlet PE, said entry PE according to the multicast address in said join message or the quit message (s, g); Confirm the multicast forwarding item of the polymerization corresponding, and in the multicast forwarding item of this polymerization, accomplish the step of setting up, deleting said corresponding relation with this address.
Mode three:
In this mode, the shared multicast forwarding item entry of all multicast address ((
*,
*), PE}), at this moment, use the intermediate conveyor net of I-IP to be equivalent to a Local Area Network, entry PE need with multicast packet encapsulation back with mode of unicast send to entry ((
*,
*), PE}) and in all PE.
Adopt this mode, entry PE only need safeguard an entry ((
*,
*), PE}) the forwarding item.Concrete maintenance mode can for: use Border Gateway Protocol (BGP) message rather than join message safeguard this entry ((
*,
*), PE}), that is: the entry PE bgp neighbor PE that all are known joins and { among the PE} set, after entry PE is received multicast packet, sends to all bgp neighbor PE with mode of unicast.
This kind mode is suitable for that PE quantity is not a lot of situation in the I-IP transmission network, can effectively alleviate the burden of PE.
Below, the device that the embodiment of the invention provided is specified.
Referring to Fig. 5; The device of the realization multicast transmission that is provided in the embodiment of the invention comprises that peripheral client nets transport module 501, peripheral client nets processing module 502, intermediate conveyor net processing module 503, intermediate conveyor net transport module 504, multicast forwarding corresponding relation memory module 505, wherein:
Said peripheral client nets transport module 501 and is used for: receive peripheral client and net the multicast packet that client is sent, and this multicast packet is sent to said peripheral client nets processing module 502;
Said peripheral client nets processing module 502 and is used for: when confirming that through the inquiry multicast routing table multicast packet that obtains being received needs that transmission network is transmitted between span centre, this multicast packet is sent to said intermediate conveyor net processing module 503;
Said intermediate conveyor net processing module 503 is used for: according to multicast address and the multicast address of said multicast forwarding corresponding relation memory module 505 storages and the corresponding relation of outlet PE of said multicast packet; Definite each outlet PE that is complementary with said multicast packet; And; Utilize the address of determined said each outlet PE, said multicast packet is encapsulated respectively;
Said intermediate conveyor net transport module 504 is used for: each multicast packet with after 503 encapsulation of intermediate conveyor net processing module is sent to determined said each outlet PE with mode of unicast through the intermediate conveyor net respectively.
In the preferred embodiment of the present invention; Set up, delete said corresponding relation in order to be implemented in the multicast forwarding corresponding relation memory module 505; This device further comprises multicast transition control module 506, and at this moment, said intermediate conveyor net transport module 504 also is used for:
Reception is withdrawed from message through the request adding or the request of the encapsulation that the transmission of intermediate conveyor net comes, and with this message transmissions to said intermediate conveyor net processing module 503;
Said intermediate conveyor net processing module 503 also is used for: the request of said encapsulation is added or request is withdrawed from message and carried out decapsulation, and the message after the decapsulation is sent to peripheral client net processing module 502 and handle;
Said peripheral client nets processing module 502 and also is used for: after the request of receiving decapsulation added or asks to withdraw from message, notice multicast transition control module 506 was handled;
Said multicast transition control module 506 is used for: add or ask according to described request and withdraw from the multicast address that message carries, upgrade the multicast address of storage in the said multicast forwarding corresponding relation memory module 505 and the corresponding relation of outlet PE.
In above description; The device of said realization multicast transmission is corresponding to aforesaid entry PE; When this installs as outlet PE; Said intermediate conveyor net processing module 503 also can be further used for the multicast packet of the encapsulation that receives from said intermediate conveyor net transport module 504 is carried out decapsulation, and the multicast packet after the decapsulation is sent to said peripheral client nets processing module 502;
Said peripheral client nets processing module 502 and further transmits through the multicast packet that said peripheral client nets after the said decapsulation that 501 pairs of transport modules receive, accomplishes the transmission of multicast packet at peripheral client's net.
Further, during as outlet PE, said peripheral client nets processing module 502 and also can be further used at the device of said realization multicast transmission:
Unicast protocol according to peripheral client's net is transmitted, and judges whether the multicast packet after the said decapsulation of receiving is redundant data, if then abandon this multicast packet.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (13)
1. a method that realizes multicast transmission is characterized in that, this method comprises:
Inlet provider edge PE receiving multicast data;
Said entry PE is based on the multicast address of said multicast packet and the corresponding relation of multicast address of on himself, setting up and corresponding outlet PE; Confirm each outlet PE of being complementary with said multicast packet, said multicast address comprise client the multicast source in the multicast group that will insert the address, with and the address of the multicast group that will add;
Said specifically being embodied as of said corresponding relation of on entry PE, setting up:
The peripheral client that request adds multicast group nets client, to joining message with the request of sending of its outlet PE that directly links to each other, wherein, carries multicast address during this request joins message through peripheral client's net;
Said outlet PE with described request join message with the encapsulation of the address of this outlet PE after, be sent to said entry PE with mode of unicast through the intermediate conveyor net;
The described request that said entry PE receives after the encapsulation joins message, and this message is carried out decapsulation, and handles as follows according to the multicast address in this message:
If had the multicast address that described request joins message and the corresponding relation of corresponding outlet PE, then the information with the said outlet PE that obtains after the decapsulation is increased in the corresponding relation of said multicast address and corresponding outlet PE;
If the current multicast address that described request joins message and the corresponding relation of corresponding outlet PE of not existing then set up this corresponding relation on said entry PE;
Said entry PE is utilized the address of determined said each outlet PE, said multicast packet is encapsulated respectively, and each multicast packet after will encapsulating is sent to determined said each outlet PE with mode of unicast through the intermediate conveyor net respectively.
2. method according to claim 1 is characterized in that, this method further comprises:
On said entry PE, set up the corresponding relation of said multicast address and corresponding outlet PE.
3. method according to claim 1 is characterized in that, this method further comprises:
The corresponding relation of said multicast address of deletion and corresponding outlet PE on said entry PE.
4. method according to claim 3 is characterized in that, said specifically being embodied as of said corresponding relation of on entry PE, deleting:
The peripheral client that multicast group is withdrawed from request nets client, and to withdrawing from message with the request of sending of its outlet PE that directly links to each other, wherein, this request is withdrawed from and carried multicast address in the message through peripheral client's net;
Said outlet PE is sent to said entry PE with mode of unicast through the intermediate conveyor net after described request is withdrawed from the address encapsulation of message and this outlet PE;
Said entry PE is carried out decapsulation to the message that receives, and searches to obtain described request and withdraw from the pairing multicast address of multicast address and the corresponding relation of outlet PE in the message, and the information of the said outlet PE that obtains after the decapsulation is deleted in this corresponding relation.
5. according to any described method of claim 1～4, it is characterized in that the corresponding relation of said multicast address and corresponding outlet PE is:
The corresponding relation of a multicast address outlet PE corresponding with it.
6. according to any described method of claim 1～4, it is characterized in that the corresponding relation of said multicast address and corresponding outlet PE is:
The said multicast address that at least two multicast address with common trait are shared and the corresponding relation of corresponding outlet PE.
7. method according to claim 6 is characterized in that, each multicast packet after said entry PE will encapsulate further comprises after being sent to determined said each outlet PE with mode of unicast through the intermediate conveyor net respectively:
After said outlet PE is received said multicast packet, judge whether this multicast packet is redundant data, if then abandon this multicast packet.
8. according to any described method of claim 1～4, it is characterized in that the corresponding relation of said multicast address and corresponding outlet PE is:
The said multicast address that all multicast address are shared and the corresponding relation of corresponding outlet PE.
9. according to any described method of claim 1～4, it is characterized in that the corresponding relation of said multicast address and corresponding outlet PE is preserved through the multicast forwarding item.
10. according to any described method of claim 1～4, it is characterized in that each multicast packet after said entry PE will encapsulate further comprises after being sent to determined said each outlet PE with mode of unicast through the intermediate conveyor net respectively:
The multicast packet of said outlet PE after to said encapsulation carries out decapsulation, and the multicast packet that obtains after the decapsulation is further transmitted.
11. device of realizing multicast transmission; It is characterized in that; This device comprises: peripheral client nets transport module, peripheral client nets processing module, intermediate conveyor net processing module, intermediate conveyor net transport module, multicast forwarding corresponding relation memory module, wherein:
Said peripheral client nets transport module and is used for: receive peripheral client and net the multicast packet that client is sent, and this multicast packet is sent to said peripheral client nets processing module;
Said peripheral client nets processing module and is used for: when confirming that the multicast packet that obtains being received needs that transmission network is transmitted between span centre, this multicast packet is sent to said intermediate conveyor net processing module;
Said intermediate conveyor net processing module is used for: the multicast address of storing according to the multicast address and the said multicast forwarding corresponding relation memory module of said multicast packet of on entry PE, setting up and the corresponding relation of outlet PE; Definite each outlet PE that is complementary with said multicast packet; And; Utilize the address of determined said each outlet PE; Said multicast packet is encapsulated respectively, said multicast address comprise said client the multicast source in the multicast group that will insert the address, with and the address of the multicast group that will add;
Said intermediate conveyor net transport module is used for: each multicast packet with after the encapsulation of intermediate conveyor net processing module is sent to determined said each outlet PE with mode of unicast through the intermediate conveyor net respectively;
This device further comprises the multicast transition control module, and said intermediate conveyor net transport module also is used for:
Reception is withdrawed from message through the request adding or the request of the encapsulation that the transmission of intermediate conveyor net comes, and with this message transmissions to said intermediate conveyor net processing module;
Said intermediate conveyor net processing module also is used for: the request of said encapsulation is added or request is withdrawed from message and carried out decapsulation, and the message after the decapsulation is sent to said peripheral client net processing module and handle;
Said peripheral client nets processing module and also is used for: after the request of receiving decapsulation adds or asks to withdraw from message, notify said multicast transition control module to handle;
Said multicast transition control module is used for: add or the multicast address that message carries is withdrawed from request according to described request, upgrade the multicast address stored in the said multicast forwarding corresponding relation memory module and the corresponding relation of outlet PE.
12. based on the described device of claim 11; It is characterized in that; Intermediate conveyor net processing module is further used for the multicast packet of the encapsulation that receives from said intermediate conveyor net transport module is carried out decapsulation, and the multicast packet after the decapsulation is sent to said peripheral client's net processing module;
Said peripheral client nets processing module and is further used for: net the multicast packet of transport module after to the said decapsulation of receiving through said peripheral client and further transmit.
13. device according to claim 12 is characterized in that, peripheral client nets processing module and is further used for:
Judge whether the multicast packet after the said decapsulation of receiving is redundant data, if then abandon this multicast packet.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710154643A CN101394342B (en) | 2007-09-20 | 2007-09-20 | Method and apparatus for implementing multicast authentication |
| PCT/CN2008/072449 WO2009039788A1 (en) | 2007-09-20 | 2008-09-22 | A method and apparatus of realizing multicast transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710154643A CN101394342B (en) | 2007-09-20 | 2007-09-20 | Method and apparatus for implementing multicast authentication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101394342A CN101394342A (en) | 2009-03-25 |
| CN101394342B true CN101394342B (en) | 2012-08-29 |
Family
ID=40494425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710154643A Active CN101394342B (en) | 2007-09-20 | 2007-09-20 | Method and apparatus for implementing multicast authentication |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101394342B (en) |
| WO (1) | WO2009039788A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426680B (en) | 2013-09-03 | 2018-03-16 | 华为技术有限公司 | Data transmission method, device and system |
| CN104954265B (en) | 2014-03-25 | 2018-06-15 | 华为技术有限公司 | Send the method and interchanger of multicast message |
| CN105871565B (en) | 2015-01-20 | 2019-11-29 | 华为技术有限公司 | Method and device for multicast forwarding |
| CN106453088B (en) * | 2016-09-28 | 2019-06-25 | 平安科技（深圳）有限公司 | A kind of static routing configuration method and terminal |
| CN108632678B (en) * | 2017-03-22 | 2023-03-24 | 中兴通讯股份有限公司 | Data transmission method, device and system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3722134B2 (en) * | 2003-06-04 | 2005-11-30 | 日本電気株式会社 | IP multicast distribution system, streaming data distribution method, and program thereof |
| US7483439B2 (en) * | 2005-03-21 | 2009-01-27 | Cisco Technology, Inc. | VPN services using address translation over an IPv6 network |
| CN100566282C (en) * | 2005-08-31 | 2009-12-02 | 杭州华三通信技术技术有限公司 | The Apparatus and method for of control transmitting multicast data |
| CN100448228C (en) * | 2005-09-02 | 2008-12-31 | 杭州华三通信技术有限公司 | Method for multicasting message to traverse non multicasting network and its applied network system |
| CN100481817C (en) * | 2006-01-23 | 2009-04-22 | 北京交通大学 | Multi-domain multicast integration data distributing structure and method based on IP/MPLS/BGP |
| CN101009669B (en) * | 2007-01-05 | 2011-04-13 | 杭州华三通信技术有限公司 | A method and system and route device for transmitting the multicast message |
| CN101035057B (en) * | 2007-03-30 | 2011-03-30 | 华为技术有限公司 | Method for establishing the multicast share tree and data transfer method and communication network |
-
2007
- 2007-09-20 CN CN200710154643A patent/CN101394342B/en active Active
-
2008
- 2008-09-22 WO PCT/CN2008/072449 patent/WO2009039788A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN101394342A (en) | 2009-03-25 |
| WO2009039788A1 (en) | 2009-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100372347C (en) | 4 over 6 tunnel packing and depacking method for extending boundary gateway protocol | |
| CN102546382B (en) | Method and system for realizing multicast in Internet protocol version 4 over Internet protocol version 6 (IPv4overIPv6) tunnel | |
| CN104954265B (en) | Send the method and interchanger of multicast message | |
| CN101394342B (en) | Method and apparatus for implementing multicast authentication | |
| CN1483266A (en) | Multicast route in AD-HOC network | |
| JP2004179811A (en) | Packet repeating device | |
| CN104022936B (en) | A kind of tunnel establishing method and device | |
| JP4436960B2 (en) | Packet communication system and mobile communication system | |
| CN101155143A (en) | Packet relay apparatus | |
| CN102958197B (en) | Method for establishing X2 service signaling connection, base station and CSG (cell site gateway) | |
| CN102325076A (en) | Method for discovering PMTU (Path Maximum Transfer Unit) and node | |
| JPWO2006103719A1 (en) | Multicast communication method | |
| CN101150481B (en) | Method and device for WLAN and LAN intercommunication | |
| WO2007079632A1 (en) | A MULTICAST DISPOSING METNOD, MULTICAST METNOD AND APPARATUS AMONG IPv6 ISLANDS | |
| CN102724767B (en) | Virtual private network access method and device for mobile user | |
| CN101499951B (en) | Tunnel configuration method, virtual access node, virtual edge node and system | |
| CN102984070A (en) | Method for realizing data forwarding through unnumbered interface of Ethernet | |
| CN105933235B (en) | Data communications method and device | |
| CN103780492B (en) | The method and relevant device of message forwarding | |
| CN105591897B (en) | The MAC Address synchronous method and device of TRILL network | |
| CN101197752B (en) | Multicast implementing method based on independent multicast-special source protocol in flexible wire type tunnel | |
| CN106487677B (en) | Provider edge equipment and data forwarding method | |
| CN100488169C (en) | A method for data processing in bridging network and bridging network | |
| CN1960281B (en) | Virtual internet exchanging system having virtual line card and its transmission method | |
| CN101394298A (en) | Method and apparatus for establishing multipath transmission path, and implementing multicast transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |