CN101702672A - Forwarding method and forwarding device for multicast data message - Google Patents
Forwarding method and forwarding device for multicast data message Download PDFInfo
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Abstract
The invention discloses a forwarding method and a forwarding device for multicast data messages; the method comprises the following steps: receiving the adding request information of the multicast group, wherein the adding request information of the multicast group carries a first multicast group mark of the multicast group needs to be added into a first host and the address information of the first host; distributing an export interface for the multicast group corresponding to the first multicast group mark, building a mapping table between any two of the export interfaces, the first multicast group mark and the address information of the first host; receiving the multicast data message, searching the mapping table according to the multicast group mark in the multicast data message to obtain the address information of a target host and an export interface mark; duplicating the multicast data massage; correcting the target address information of the duplicated multicast data message into the address information of the target host; sending the corrected multicast massage to the target host unicast from the export interface corresponding to the export mark according to the address information of the target host. The invention can be used in multicast network, thus saving network bandwidth.
Description
Technical field
The present invention relates to networking technology area, be specifically related to a kind of multicast data message retransmission method and retransmission unit.
Background technology
In multicasting technology, make multicast data message finally can arrive the recipient, need be with recipient's main frame incoming multicast network, and join in the corresponding multicast group.Internet group management protocol of the multicast group (IGMP, Internet Group Management Protocol) is a kind of main frame of using at user's network segment in multicasting technology signaling mechanism to router.By on recipient's main frame and multicast router, disposing IGMP, can realize that dynamic adding of main frame and multicast router are to local network group membership management of information.
IGMP snooping (Snooping) technology is a kind ofly to set up the outgoing interface mapping table of multicast group correspondence by intercepting IGMP message mutual between multicast router and the main frame, after receiving multicast data message, search above-mentioned mapping table, send multicast data message from corresponding outgoing interface, promptly to corresponding multicast member multicast data forwarding message, thereby realize the forwarding as required of multicast data message.
The inventor finds in the process of research prior art, if the downstream network device of multicast router is not supported the IGMP snooping function in the existing multicast network, general switch for example, the multicast data message that this downstream network device arrives broadcast reception, thereby will cause user bandwidth to be taken in a large number, the waste network bandwidth.
Summary of the invention
The invention provides a kind of downstream network device broadcast multicast data method of message and the retransmission unit that can avoid not supporting the IGMP snooping function.
The multicast data message retransmission method that the embodiment of the invention provides, comprise: the receiving group group message that joins request, multicast group join request first multicast identifier that carries the multicast group that first main frame need add in the message and the address information of first main frame, address information is Media Access Control Address or host identification information; The multicast group that is the first multicast identifier correspondence distributes interface, sets up the mapping table that shines upon in twos between the address information of outgoing interface, first multicast identifier and first main frame; The receiving multicast data message is searched mapping table according to the multicast identifier in the multicast data message, obtains the address information and the outgoing interface sign of destination host; The duplicated multicast data message will duplicate the destination address letter of the multicast data message of generation
Breath is revised as the address information of destination host; Address information according to destination host sends amended multicast data message from the corresponding outgoing interface of outgoing interface sign to the destination host clean culture.
The embodiment of the invention also provides a kind of retransmission unit, comprise: first receiving element, be used for the receiving group group message that joins request, multicast group join request first multicast identifier that carries the multicast group that first main frame need add in the message and the address information of first main frame, address information is Media Access Control Address or host identification information; The mapping table creating unit is used to the multicast group of the first multicast identifier correspondence to distribute interface, sets up the mapping table that shines upon in twos between the address information of outgoing interface, first multicast identifier and first main frame; The multicast packet receiving element is used for the receiving multicast data message; Query unit is used for searching mapping table according to the multicast identifier of multicast data message, obtains the address information and the outgoing interface sign of destination host; The multicast packet processing unit, the duplicated multicast data message is revised as the destination address information of duplicating the multicast data message of generation the address information of destination host; Multicast packet sends the unit, is used for sending amended multicast data message from the corresponding outgoing interface of outgoing interface sign to the destination host clean culture according to the address information of destination host.
In embodiments of the present invention, the retransmission unit of upstream sends multicast data message according to the address information of destination host to the destination host clean culture, the downstream network device of not supporting the IGMP snooping function is behind the multicast data message that receives the clean culture transmission, address information according to destination host is transmitted to the destination host of correspondence, and can not broadcast this multicast data message to the subscriber's main station that inserts by this downstream network device.Compared with prior art, the embodiment of the invention can be saved the network bandwidth.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, to do to introduce simply to the accompanying drawing of required use among the embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of multicast data message retransmission method first embodiment that provides of the embodiment of the invention;
Fig. 2 is the flow chart that triggers method first embodiment that carries out the duplicated multicast data message in the embodiment of the invention;
Fig. 3 is the flow chart that triggers method second embodiment that carries out the duplicated multicast data message in the embodiment of the invention;
Fig. 4 is the method flow diagram that processing multicast group that the embodiment of the invention provides is left request message;
Fig. 5 is the application scenarios figure of embodiment of the invention multicast data message retransmission method;
Fig. 6 is the flow chart of data forwarding method second embodiment in the application scenarios that provides of the embodiment of the invention;
Fig. 7 is the structural representation of retransmission unit first embodiment that provides of the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the application's protection.
The embodiment of the invention provides a kind of multicast data message retransmission method and retransmission unit.The technical scheme of embodiment describes in detail embodiment provided by the invention below in conjunction with accompanying drawing for a better understanding of the present invention.
Referring to Fig. 1, Fig. 1 is the flow chart of multicast data message retransmission method first embodiment that provides of the embodiment of the invention.In embodiments of the present invention, retransmission unit is supported the IGMP snooping function, and retransmission unit multicast data forwarding method of message can comprise:
Steps A 1, the receiving group group message that joins request, multicast group join request first multicast identifier that carries the multicast group that first main frame need add in the message and the address information of first main frame, address information is medium access address or host identification information.
Concrete, retransmission unit can receive multicast group that subscriber's main station the sends information that joins request, this multicast group join request first multicast identifier that carries the multicast group that first main frame need add in the information and the address information of first main frame.Wherein, first multicast identifier can be used to identify multicast group, and the address information of first main frame can be medium access control (MAC, the Media Access Control) address of first main frame.The multicast group message that joins request can be reported (Report) message for IGMP.
Steps A 2, be that the multicast group of the first multicast identifier correspondence distributes interface, set up between the address information of outgoing interface, first multicast identifier and main frame the mapping table of mapping in twos.
Concrete, retransmission unit can distribute interface for the multicast group of the first multicast identifier correspondence, and sets up the mapping table that shines upon in twos between the address information of outgoing interface, first multicast identifier and main frame.Wherein, can comprise a plurality of mapping items in the mapping table, the multicast identifier that each mapping item is corresponding different can comprise the address information of main frame, the out of Memory such as outgoing interface of distribution in the mapping item.
Steps A 3, receiving multicast data message are searched mapping table according to the multicast identifier in the multicast data message, obtain the address information and the outgoing interface sign of destination host.
Concrete, the multicast data message that retransmission unit can the receiving group source sends, carry multicast identifier in the multicast data message, retransmission unit is searched mapping table according to the multicast identifier in the multicast data message, the address information of the destination host in the multicast group of acquisition multicast identifier correspondence and the outgoing interface sign of destination host correspondence.Wherein, can comprise first main frame in the destination host.
Steps A 4, duplicated multicast data message are revised as the destination address information of duplicating the multicast data message of generation the address information of destination host.
Concrete, retransmission unit duplicates the multicast data message that receives, and the destination address information that will duplicate the multicast data message of generation is revised as the address information of destination host.Wherein, the multicast data message quantity of duplicating can equate with the quantity of multicast group internal object main frame.
Steps A 5, send amended multicast data message from the corresponding outgoing interface of outgoing interface sign to the destination host clean culture according to the address information of destination host.
Concrete, retransmission unit is according to address information of searching the destination host that obtains and outgoing interface sign, sends amended multicast data message from the outgoing interface of correspondence to the destination host clean culture.Destination host in the multicast group can receive corresponding multicast data message.
In embodiments of the present invention, the retransmission unit of upstream sends multicast data message according to the address information of destination host to the destination host clean culture, the downstream network device of not supporting the IGMP snooping function is behind the multicast data message that receives the clean culture transmission, address information according to destination host is transmitted to the destination host of correspondence, and can not broadcast this multicast data message to the subscriber's main station that inserts by this downstream network device.Compared with prior art, the embodiment of the invention can be saved the network bandwidth.
Referring to Fig. 2, Fig. 2 triggers the flow chart of carrying out duplicated multicast data message method first embodiment in the embodiment of the invention.
In embodiments of the present invention, retransmission unit can also be carried out following steps between execution in step A3 and steps A 4:
Step B1, judge that whether the quantity of destination host in the multicast group of multicast identifier correspondence in the multicast data message is less than first preset value.
Concrete, retransmission unit can judge that whether the quantity of destination host in the multicast group of multicast identifier correspondence is less than first preset value.Wherein, retransmission unit can obtain the quantity of destination host in the multicast group of multicast identifier correspondence according to the quantity of the Media Access Control Address of the destination host that gets access in the steps A 3.
Step B2, during less than first preset value, then trigger the step of carrying out the duplicated multicast data message in the quantity of judging destination host.
Concrete, retransmission unit can during less than first preset value, trigger the step of carrying out the duplicated multicast data message in the quantity of judging destination host, promptly triggers execution in step A4.Wherein, first preset value can come flexible configuration according to network size.
Step B3, during greater than first preset value, send out multicast data message to next redirect according to multicast routing table in the quantity of judging destination host.
Retransmission unit can also during greater than first preset value, be transmitted according to normal multicast handling process in the quantity of judging destination host, for example searches multicast routing table and sends out multicast data message to next redirect.
In the embodiment of the invention, in the quantity of judging destination host during less than first preset value, just the fill order broadcasts the step of sending multicast data message, can send the necessity of multicast message according to network size, network equipment deployment scenario assessment clean culture, flexible configuration first preset value, thereby avoid taking too much bandwidth, improved the flexibility that sends multicast data message by the user to the situation that an interface repeatedly sends multicast data message.
Referring to Fig. 3, Fig. 3 is the flow chart that triggers method second embodiment that carries out the duplicated multicast data message in the embodiment of the invention.
In embodiments of the present invention, retransmission unit can also be carried out following steps between execution in step A3 and steps A 4:
Step C1, obtain the network performance of downstream network.
Concrete, retransmission unit can obtain the network performance of downstream network, for example obtains the network performances such as packet loss, time-delay, shake of downstream network.
Step C2, during more than or equal to default network performance index, then trigger the step of carrying out the duplicated multicast data message at network performance.
Concrete, retransmission unit can during more than or equal to default network performance index, trigger the step of carrying out the duplicated multicast data message in the downstream network performance, promptly triggers execution in step A4.Wherein, network performance index can be set flexibly according to different network performance parameters such as packet loss, shake, time-delays.
Step C3, during less than default network performance index, send out multicast data message to next redirect according to multicast routing table at network performance.
Retransmission unit can also be transmitted according to normal multicast handling process when judging network performance less than default network performance index, for example searches multicast routing table and sends out multicast data message to next redirect.
In the embodiment of the invention, when judging the downstream network performance more than or equal to default network performance index, just the fill order broadcasts the step of sending multicast data message, can send the necessity of multicast message according to assessment clean cultures such as network environment, stopping states, the flexible configuration network performance index, thereby avoid to an interface repeatedly the clean culture situation that sends multicast data message take too much downstream network bandwidth, improved the flexibility that sends multicast data message by the user.
Referring to Fig. 4, Fig. 4 is the method flow diagram that processing multicast group that the embodiment of the invention provides is left request message.
In embodiments of the present invention, retransmission unit can also be carried out following steps after the destination host clean culture sends amended multicast data message:
Step D1, receiving group group are left request message, and multicast group is left first multicast identifier that carries the multicast group that first main frame need leave in the request message and the address information of first main frame.
Concrete, retransmission unit can receive the multicast group that subscriber's main station sends and leave request message, and multicast group is left first multicast identifier that carries the multicast group that first main frame need leave in the request message and the address information of first main frame.Wherein, the address information of first main frame can be the Media Access Control Address or the host identification information of main frame.Multicast group is left request message can leave (Leave, IncludeNULL) message of message or other type for IGMP.
The outgoing interface sign of the address information correspondence of step D2, the address information of from the first multicast identifier corresponding mapping table item, deleting first main frame and first main frame.
Concrete, retransmission unit can delete the address information correspondence of the address information of first main frame and first main frame from the first multicast identifier corresponding mapping table item outgoing interface identifies, to avoid sending to first main frame when send multicast data message next time.
In embodiments of the present invention, leaving the processing procedure of request message by increasing multicast group, can be so that subscriber's main station can freely leave corresponding multicast group, thus select the multicast group that adds flexibly, therefore the embodiment of the invention can adapt to the more applications scene, and the scope of application is wider.
For understanding the embodiment of the invention in more detail, provide the concrete application scenarios of multicast data message retransmission method embodiment below.
Referring to Fig. 5, Fig. 5 is the application scenarios figure of embodiment of the invention multicast data message retransmission method.
As shown in the figure, retransmission unit S1 is the equipment that can support IGMP or IGMP snooping function, and network equipment S2 is the upstream device of retransmission unit S1.Subscriber's main station A, subscriber's main station B, subscriber's main station C and subscriber's main station D are by in the network equipment S2 incoming multicast network.
Wherein, network equipment S2 does not support the IGMP snooping function.Retransmission unit S1 can be router, and network equipment S2 can be general switch.
Referring to Fig. 6, Fig. 6 is the flow chart of data forwarding method second embodiment in the application scenarios that provides of the embodiment of the invention.
In application scenarios of the present invention, the step of retransmission unit multicast data forwarding message can comprise:
The IGMP Report message that step e 1, reception subscriber's main station send.
Concrete, subscriber's main station A, C, D send IGMP report message, IGMP to retransmission unit respectively
Carry the MAC Media Access Control Address of subscriber's main station A, C, D and the multicast identifier a that requires to add multicast group in the report message respectively.User B sends IGMP report message to retransmission unit, carries the MAC Media Access Control Address of subscriber's main station B and the multicast identifier b of the multicast group that requirement adds in the IGMP report message.Retransmission unit receives the IGMPReport message that subscriber's main station A, B, C and D send.
In embodiments of the present invention, first main frame can be subscriber's main station A, B, C or D.Address information for medium control access address, can also be host identification information in embodiments of the present invention certainly.
In embodiments of the present invention, retransmission unit is designated 1 at the outgoing interface that subscriber's main station A, C in the multicast group a, D distribute, and retransmission unit is designated 1 at the outgoing interface that the subscriber's main station B in the multicast group b distributes.It is pointed out that retransmission unit can distribute different outgoing interface signs at the subscriber's main station in the multicast group.
Retransmission unit is also set up the Media Access Control Address mapping table between any two of outgoing interface, first multicast identifier and main frame.Mapping table can be as shown in table 1:
Table 1
| Multicast group | Outgoing interface | Subscriber host information |
| ??a | ??Port?1 | A (Media Access Control Address that comprises subscriber's main station A) |
| ??a | ??Port?1 | C (Media Access Control Address that comprises subscriber's main station C) |
| Multicast group | Outgoing interface | Subscriber host information |
| ??a | ??Port?1 | D (Media Access Control Address that comprises subscriber's main station D) |
| ??b | ??Port?1 | B (Media Access Control Address that comprises subscriber's main station B) |
Wherein, comprise the Media Access Control Address of subscriber's main station in the subscriber host information, can also comprise the out of Memory of subscriber's main station.
Step e 3, receiving multicast data message are searched mapping table according to the multicast identifier in the multicast data message, obtain the Media Access Control Address and the outgoing interface sign of destination host.
Concrete, the multicast data message that retransmission unit receiving group source sends, for example receive multicast source and send to the multicast data message of multicast group a, retransmission unit is searched above-mentioned mapping table according to multicast identifier a, obtains Media Access Control Address and the outgoing interface sign 1 of subscriber's main station A, C and D.In embodiments of the present invention, subscriber's main station A, C and D are destination host.
Step e 4, judge that whether the quantity of subscriber's main station is less than 5.
In the present embodiment, first preset value is 5, and this moment, retransmission unit judged that whether the quantity of subscriber's main station is less than 5.
The quantity of step e 5, subscriber's main station triggers the step of duplicated multicast data message less than 5.
Subscriber's main station quantity is 3 in the invention process, less than 5, then triggers the step of carrying out the duplicated multicast data message.
Step e 6, duplicated multicast data message are revised as the purpose Media Access Control Address that duplicates the multicast data message of generation the Media Access Control Address of subscriber's main station.
In embodiments of the present invention, retransmission unit duplicates three parts of multicast data messages, and the purpose Media Access Control Address that will make the multicast data message that generates is revised as the Media Access Control Address of subscriber's main station A, C and D.
Step e 7, send amended multicast data message from the corresponding outgoing interface of outgoing interface sign to the subscriber's main station clean culture according to the Media Access Control Address of subscriber's main station.
In embodiments of the present invention, retransmission unit sends amended multicast data message from outgoing interface 1 to subscriber's main station A, C and D clean culture according to the Media Access Control Address of subscriber's main station A, C and D.
Prior network device, general switch for example, receive the multicast data message that clean culture sends after, transmit this multicast data message to subscriber's main station A, C and D, subscriber's main station A, C and D can receive multicast data message.Do not support the downstream network device of IGMP snooping function can not broadcast this multicast data message to the subscriber's main station that inserts by this downstream network device.Compared with prior art, the embodiment of the invention can be saved the network bandwidth.
In addition, the embodiment of the invention also provides a kind of retransmission unit.Referring to Fig. 7, Fig. 7 is the structural representation of the retransmission unit embodiment that provides of the embodiment of the invention.
In embodiments of the present invention, retransmission unit mainly comprises:
First receiving element 110, be used for the receiving group group message that joins request, multicast group join request first multicast identifier that carries the multicast group that first main frame need add in the message and the address information of first main frame, address information is Media Access Control Address or host identification information;
Mapping table creating unit 120 is used to the multicast group of the first multicast identifier correspondence to distribute interface, sets up the mapping table that shines upon in twos between the address information of outgoing interface, first multicast identifier and first main frame;
Multicast packet receiving element 130 is used for the receiving multicast data message;
Query unit 140 is used for searching mapping table according to the multicast identifier of multicast data message, obtains the address information and the outgoing interface sign of destination host;
Multicast packet processing unit 150, the duplicated multicast data message is revised as the destination address information of duplicating the multicast data message of generation the address information of destination host;
Multicast packet sends unit 160, is used for sending amended multicast data message from the corresponding outgoing interface of outgoing interface sign to the destination host clean culture according to the address information of destination host.
The retransmission unit that the embodiment of the invention provides can use in aforementioned multicast data message retransmission method embodiment, no longer is repeated in this description at this.In embodiments of the present invention, the retransmission unit of upstream sends multicast data message according to the address information of destination host to the destination host clean culture, the downstream network device of not supporting the IGMP snooping function is transmitted to the destination host of correspondence according to the address information of destination host behind the multicast data message that receives the clean culture transmission.And can not broadcast this multicast data message to the subscriber's main station that inserts by this downstream network device.Compared with prior art, the embodiment of the invention can be saved the network bandwidth.
In embodiments of the present invention, retransmission unit can also comprise:
First judging unit 170, whether the quantity that is used for judging destination host in the multicast group of multicast data message multicast identifier correspondence is greater than first preset value;
First trigger element 180, when being used for quantity at destination host less than first preset value, the step of trigger data processing unit 150 duplicated multicast data messages then.
The embodiment of the invention is by increasing by first judging unit 170 and first trigger element 180, make that retransmission unit can be in the quantity of destination host during less than first preset value, just the fill order broadcasts the step of sending multicast data message, can send the necessity of multicast message according to network size, network equipment deployment scenario assessment clean culture, flexible configuration first preset value, thereby avoid to an interface repeatedly the clean culture situation that sends multicast data message take too much bandwidth, improve the flexibility that sends multicast data message by the user, thereby adapted to the more applications scene.
In embodiments of the present invention, retransmission unit can also comprise:
Network performance acquiring unit 190 is used to obtain the network performance of downstream network;
Second trigger element 200 is used for during more than or equal to default network performance index, then triggering the step that multicast packet processing unit 150 is carried out the duplicated multicast data messages at network performance.
In the embodiment of the invention, by increasing the network performance acquiring unit 190 and second trigger element 200, when judging the downstream network performance more than or equal to default network performance index, just the fill order broadcasts the step of sending multicast data message, can send the necessity of multicast message according to assessment clean cultures such as network environment, stopping states, the flexible configuration network performance index, thereby avoid to an interface repeatedly the clean culture situation that sends multicast data message take too much downstream network bandwidth, improved the flexibility that sends multicast data message by the user.
In embodiments of the present invention, retransmission unit can also comprise:
Second receiving element 210 is used for the receiving group group and leaves request message, and multicast group is left first multicast identifier that carries the multicast group that first main frame need leave in the request message and the address information of first main frame;
Mapping table delete cells 220 is used for from the outgoing interface sign of the address information correspondence of the address information of first multicast identifier corresponding mapping table item deletion, first main frame and first main frame.
In embodiments of the present invention, by increasing by second receiving element 210 and mapping table delete cells 220, can be so that subscriber's main station can freely leave corresponding multicast group, thus select the multicast group that adds flexibly, therefore the embodiment of the invention can adapt to the more applications scene, and accommodation is wider.
More than multicast data message retransmission method and retransmission unit that the embodiment of the invention is provided be described in detail, the embodiment of the invention also is applicable to Internet protocol sixth version (IPv6, Internet ProtocolVersion 6) multicast scene, the embodiment of the invention can also be applicable to the situation of VLAN (VLAN, VirtualLocal Area Network), VPN (virtual private network) (VPN, Virtual Private Network).Media Access Control Address wherein also can replace with other addresses or host identification, such as at the 4th edition (IPv4 of Internet protocol, Internet Protocol Version 4) in, Media Access Control Address in the foregoing description can replace with IPv4 address or other attribute informations that can identify main frame, and in IPv6, the Media Access Control Address in the foregoing description can replace with IPv6 address, host identification HI (HostIdentifier) or other attribute informations that can identify main frame.For one of ordinary skill in the art, according to the thought of the embodiment of the invention, the part that all can change in specific embodiments and applications, this description should not be construed as limitation of the present invention.
Claims (9)
1. a multicast data message retransmission method is characterized in that, comprising:
The receiving group group message that joins request, described multicast group join request first multicast identifier that carries the multicast group that first main frame need add in the message and the address information of first main frame, described address information is Media Access Control Address or host identification information;
For the multicast group of the described first multicast identifier correspondence distributes interface, set up between the address information of described outgoing interface, first multicast identifier and described first main frame mapping table of mapping in twos;
The receiving multicast data message is searched described mapping table according to the multicast identifier in the multicast data message, obtains the address information and the outgoing interface sign of destination host;
Duplicate described multicast data message, the destination address information of duplicating the multicast data message of generation is revised as the address information of described destination host;
Address information according to described destination host sends amended multicast data message from the corresponding outgoing interface of described outgoing interface sign to described destination host clean culture.
2. method according to claim 1 is characterized in that, at described receiving multicast data message, searches between described mapping table and the described duplicated multicast data message according to the multicast identifier in the multicast data message, also comprises:
Whether the quantity of judging destination host in the multicast group of multicast identifier correspondence in the described multicast data message is less than first preset value;
If then trigger the step of carrying out described duplicated multicast data message.
3. method according to claim 1 is characterized in that, at described receiving multicast data message, searches between described mapping table and the described duplicated multicast data message according to the multicast identifier in the multicast data message, also comprises:
Obtain the network performance of downstream network;
During more than or equal to default network performance index, then trigger the step of carrying out the duplicated multicast data message at described network performance.
4. method according to claim 1 is characterized in that,
The described multicast group message that joins request is the Internet group management protocol of the multicast group report message.
5. method according to claim 1 is characterized in that, after described destination host clean culture sends described amended multicast data message, also comprises:
The receiving group group is left request message, and described multicast group is left first multicast identifier that carries the multicast group that first main frame need leave in the request message and the address information of described first main frame;
The outgoing interface sign of the address information correspondence of the address information of described first main frame of deletion and described first main frame from the first multicast identifier corresponding mapping table item.
6. a retransmission unit is characterized in that, comprising:
First receiving element, be used for the receiving group group message that joins request, described multicast group join request first multicast identifier that carries the multicast group that first main frame need add in the message and the address information of described first main frame, described address information is Media Access Control Address or host identification information;
The mapping table creating unit is used to the multicast group of the described first multicast identifier correspondence to distribute interface, sets up the mapping table that shines upon in twos between the address information of described outgoing interface, first multicast identifier and described first main frame;
The multicast packet receiving element is used for the receiving multicast data message;
Query unit is used for searching described mapping table according to the multicast identifier of multicast data message, obtains the address information and the outgoing interface sign of destination host;
The multicast packet processing unit duplicates described multicast data message, the destination address information of duplicating the multicast data message of generation is revised as the address information of described destination host;
Multicast packet sends the unit, is used for sending described amended multicast data message from the corresponding outgoing interface of described outgoing interface sign to described destination host clean culture according to the address information of described destination host.
7. device according to claim 6 is characterized in that, also comprises:
First judging unit, whether the quantity that is used for judging destination host in the multicast group of described multicast data message multicast identifier correspondence is less than first preset value;
First trigger element, when being used for quantity at destination host less than first preset value, then the trigger data processing unit is carried out the step of described duplicated multicast data message.
8. device according to claim 6 is characterized in that, also comprises:
The network performance acquiring unit is used to obtain the network performance of downstream network;
Second trigger element is used for during more than or equal to default network performance index, then triggering the step that the multicast packet processing unit is carried out the duplicated multicast data message at described network performance.
9. device according to claim 6 is characterized in that, also comprises:
Second receiving element is used for the receiving group group and leaves request message, and described multicast group is left first multicast identifier that carries the multicast group that first main frame need leave in the request message and the address information of described first main frame;
The mapping table delete cells is used for from the outgoing interface sign of the address information correspondence of the address information of described first main frame of first multicast identifier corresponding mapping table item deletion and first main frame.
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Cited By (19)
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| CN102387475A (en) * | 2011-12-12 | 2012-03-21 | 深圳市共进电子股份有限公司 | Transmitting method for guaranteeing reliability of wireless multicast |
| CN104601478A (en) * | 2014-12-30 | 2015-05-06 | 北京华为朗新科技有限责任公司 | Method and device for constructing message forwarding, sending, receiving and multicasting paths |
| WO2016058185A1 (en) * | 2014-10-17 | 2016-04-21 | 华为技术有限公司 | Communication method and apparatus, controller and forwarding plane devices |
| CN105897444A (en) * | 2016-05-26 | 2016-08-24 | 杭州华三通信技术有限公司 | Multicast group management method and device |
| CN107911301A (en) * | 2017-12-28 | 2018-04-13 | 新华三技术有限公司 | A kind of message forwarding method and device |
| CN108809840A (en) * | 2018-06-12 | 2018-11-13 | 天津卓越信通科技有限公司 | A method of for controlling and multicast group in management subnet |
| WO2019034005A1 (en) * | 2017-08-14 | 2019-02-21 | 华为技术有限公司 | Multicast method and device |
| CN109391909A (en) * | 2017-08-14 | 2019-02-26 | 华为技术有限公司 | A kind of method of multicasting and device |
| CN109842854A (en) * | 2017-11-29 | 2019-06-04 | 华为技术有限公司 | A kind of message multicast, message broadcasting method and apparatus |
| CN110392347A (en) * | 2018-04-16 | 2019-10-29 | 上海华为技术有限公司 | Data transmission method and device |
| CN111031495A (en) * | 2020-01-06 | 2020-04-17 | 南通大学 | Multicast communication system and method for 6LowPAN Internet of things communication network |
| CN112187715A (en) * | 2020-08-25 | 2021-01-05 | 杭州叙简科技股份有限公司 | Multicast-based POC (Point of sale) large-scale cluster distribution method and system |
| CN112187756A (en) * | 2020-09-21 | 2021-01-05 | 普联国际有限公司 | Multicast data transmission method, device, equipment and storage medium |
| CN112822097A (en) * | 2019-11-15 | 2021-05-18 | 华为技术有限公司 | Message forwarding method, first network device and first device group |
| CN113452585A (en) * | 2021-05-13 | 2021-09-28 | 新华三信息安全技术有限公司 | Communication method and device |
| CN113490162A (en) * | 2021-07-04 | 2021-10-08 | 芯河半导体科技(无锡)有限公司 | Optimization method for multicast data stream forwarding |
| CN114039913A (en) * | 2021-12-28 | 2022-02-11 | 北京天融信网络安全技术有限公司 | Method, device, system, equipment and medium for multicast forwarding |
| CN117411738A (en) * | 2023-12-15 | 2024-01-16 | 格创通信(浙江)有限公司 | Multicast replication method, device, electronic equipment and storage medium |
| WO2024088173A1 (en) * | 2022-10-24 | 2024-05-02 | 华为技术有限公司 | Multicast communication method and related apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102387475A (en) * | 2011-12-12 | 2012-03-21 | 深圳市共进电子股份有限公司 | Transmitting method for guaranteeing reliability of wireless multicast |
| WO2016058185A1 (en) * | 2014-10-17 | 2016-04-21 | 华为技术有限公司 | Communication method and apparatus, controller and forwarding plane devices |
| CN104601478A (en) * | 2014-12-30 | 2015-05-06 | 北京华为朗新科技有限责任公司 | Method and device for constructing message forwarding, sending, receiving and multicasting paths |
| CN105897444A (en) * | 2016-05-26 | 2016-08-24 | 杭州华三通信技术有限公司 | Multicast group management method and device |
| US11259149B2 (en) | 2017-08-14 | 2022-02-22 | Huawei Technologies Co., Ltd. | Multicast method and apparatus |
| WO2019034005A1 (en) * | 2017-08-14 | 2019-02-21 | 华为技术有限公司 | Multicast method and device |
| CN109391909A (en) * | 2017-08-14 | 2019-02-26 | 华为技术有限公司 | A kind of method of multicasting and device |
| CN109842854A (en) * | 2017-11-29 | 2019-06-04 | 华为技术有限公司 | A kind of message multicast, message broadcasting method and apparatus |
| CN109842854B (en) * | 2017-11-29 | 2021-01-05 | 华为技术有限公司 | Message multicast and message broadcast method and device |
| CN107911301B (en) * | 2017-12-28 | 2020-11-20 | 新华三技术有限公司 | Message forwarding method and device |
| CN107911301A (en) * | 2017-12-28 | 2018-04-13 | 新华三技术有限公司 | A kind of message forwarding method and device |
| CN110392347A (en) * | 2018-04-16 | 2019-10-29 | 上海华为技术有限公司 | Data transmission method and device |
| CN108809840B (en) * | 2018-06-12 | 2021-04-13 | 天津卓越信通科技有限公司 | Method for controlling and managing multicast group in subnet |
| CN108809840A (en) * | 2018-06-12 | 2018-11-13 | 天津卓越信通科技有限公司 | A method of for controlling and multicast group in management subnet |
| CN112822097A (en) * | 2019-11-15 | 2021-05-18 | 华为技术有限公司 | Message forwarding method, first network device and first device group |
| CN111031495A (en) * | 2020-01-06 | 2020-04-17 | 南通大学 | Multicast communication system and method for 6LowPAN Internet of things communication network |
| CN111031495B (en) * | 2020-01-06 | 2021-07-30 | 南通大学 | Multicast communication system and method for 6LowPAN Internet of things communication network |
| CN112187715A (en) * | 2020-08-25 | 2021-01-05 | 杭州叙简科技股份有限公司 | Multicast-based POC (Point of sale) large-scale cluster distribution method and system |
| CN112187715B (en) * | 2020-08-25 | 2022-09-30 | 杭州叙简科技股份有限公司 | Multicast-based POC (Point of sale) large-scale cluster distribution method and system |
| CN112187756A (en) * | 2020-09-21 | 2021-01-05 | 普联国际有限公司 | Multicast data transmission method, device, equipment and storage medium |
| CN113452585A (en) * | 2021-05-13 | 2021-09-28 | 新华三信息安全技术有限公司 | Communication method and device |
| CN113490162A (en) * | 2021-07-04 | 2021-10-08 | 芯河半导体科技(无锡)有限公司 | Optimization method for multicast data stream forwarding |
| CN113490162B (en) * | 2021-07-04 | 2022-05-17 | 芯河半导体科技(无锡)有限公司 | Optimization method for multicast data stream forwarding |
| CN114039913A (en) * | 2021-12-28 | 2022-02-11 | 北京天融信网络安全技术有限公司 | Method, device, system, equipment and medium for multicast forwarding |
| CN114039913B (en) * | 2021-12-28 | 2023-09-05 | 上海天融信网络安全技术有限公司 | Multicast forwarding method, device, system, equipment and medium |
| WO2024088173A1 (en) * | 2022-10-24 | 2024-05-02 | 华为技术有限公司 | Multicast communication method and related apparatus |
| CN117411738A (en) * | 2023-12-15 | 2024-01-16 | 格创通信(浙江)有限公司 | Multicast replication method, device, electronic equipment and storage medium |
| CN117411738B (en) * | 2023-12-15 | 2024-03-08 | 格创通信(浙江)有限公司 | Multicast replication method, device, electronic equipment and storage medium |
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