CN1996956A - L3 network device and method for multi-cast cross-VLAN forwarding - Google Patents
L3 network device and method for multi-cast cross-VLAN forwarding Download PDFInfo
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Abstract
This invention discloses one three layers network device set broadcast over VLAN transfer method, which comprises the following steps: setting three layers of network device set broadcast into VLAN and set broadcast flow received; three layers of network device establishes set broadcast transfer item according to the require information and align VLAN; the three layers of network device processes set broadcast flow transfer. This invention also provides one three layers of network device.
Description
Technical field
The present invention relates to the multicasting technology in the communication system, especially refer to a kind of three-layer network appliance and method that realizes that the multicast data flow travelling across VLAN is transmitted.
Background technology
Along with the continuous development of multimedia services such as Streaming Media, video request program and video conference in the network, the IP multicasting technology has become an important content in the Internet.Utilize IGMP (InternetGroup Management Protocol, Internet group management protocol of the multicast group) to safeguard the multicast group relation in the prior art.IGMP runs on the direct-connected three-layer network appliances such as router of network end-point and user terminal, is used for multicast user terminal is added or leaves multicast group and carry out dynamic management, and sets up three layers of multicast group address forwarding-table item.
Simultaneously, utilize IGMP Snooping (IGMP Snooping, Internet group management protocol of the multicast group is spied upon) user terminal on two-layer equipment or the three-layer network appliance and the IGMP message that disposed between the router of IGMP agreement are spied upon, set up the multicast forwarding list item, safeguard multicast group and VLAN (Virtual LocalArea Network, VLAN) and the relation of member port, only multicast data flow is copied to the port that needs to receive this multicast data flow.
The application scenarios of said method as shown in Figure 1, port one, port 2, port 3 with two-layer switching equipment of IGMP Snooping function are connected with the user, port 4 connects the router of supporting the IGMP agreements, four ports all belong to same VLAN100; When the user terminal 1 that links to each other with port one wished to add multicast group 230.1.1.1, the IGMP report message that sends multicast group 230.1.1.1 was to router; This report message at first passes through two-layer switching equipment, this two-layer switching equipment is spied upon according to this report message and has been connected a user who adds multicast group 230.1.1.1 on the port one of VLAN100, when the multicast data flow of the multicast group 230.1.1.1 that transmits when router arrives this two-layer switching equipment like this, multicast forwarding list item according to self maintained, the multicast data flow of multicast group 230.1.1.1 is transmitted to port one, and do not needed to transmit this multicast data flow to other ports.
IGMP Snooping agreement has solved the problem of broadcasting in the multicast data flow VLAN, also the forwarding capability of IGMPSnooping has been limited in the VLAN simultaneously, and the multicast data flow that is difficult to travelling across VLAN is transmitted.At two-layer switching equipment in order to solve the multicast data flow forwarding problems of travelling across VLAN, Chinese patent application (application number: 03123053.9; The applying date: on April 29th, 2003; Denomination of invention: the implementation method of multicast spanning virtual local area networks) proposed a solution: when two-layer switching equipment listens to the multicast request of the different VLAN ID of each user terminal band, the target MAC (Media Access Control) address and the corresponding VLAN ID of multicast are added in the multicast forwarding list item, simultaneously VLAN ID is added in the uplink port default VLAN, form the multicast forward table of travelling across VLAN.Must have the user of multicast request just can receive multicast data message this moment according to corresponding multicast forwarding list item multicast data forwarding message.After any one does not enter Layer 2 switch with the message of VLAN ID, all can add the default VLAN ID of corresponding port automatically, Layer 2 switch is forwarded to corresponding user according to the default VLAN ID and the multicast mac address of message with multicast data message.
The multicast data flow of three-layer network appliance travelling across VLAN of the prior art is transmitted, be by multicast routing protocol PIM-DM (Protocol Independent Multicast-Dense Mode, independent multicast protocol dense mode)/PIM-SM (Protocol Independent Multicast-Sparse Mode, independent multicast sparse mode protocol) realization.The metropolitan area network internal operation PIM-SM of identical VLAN constitutes virtual network by the tunnel between the RP node of the metropolitan area network of each VLAN inequality and the RP node of other metropolitan area networks, moves PIM-DM in this virtual network.
Yet, three layers of multicast routing protocol that dispose PIM-SM, PIM-DM, DVMRP and so in three-layer network appliance are very complicated, make in three-layer network appliance the multicast data flow that realizes travelling across VLAN transmit relatively difficulty, make the multicast forwarding of the travelling across VLAN in the real work be difficult to realize and wayward.
Summary of the invention
The problem to be solved in the present invention provides a kind of three-layer network appliance and method that realizes that the multicast data flow travelling across VLAN is transmitted, to solve the complicated defective of configuration in the prior art.
In order to realize above purpose, the invention provides a kind of multicast data flow travelling across VLAN retransmission method of three-layer network appliance, may further comprise the steps:
The multicast of configuration three-layer network appliance flows into VLAN and multicast data flow receives VLAN;
Described three-layer network appliance is set up the multicast forwarding list item according to going into VLAN and receiving VLAN of request message that is received and described configuration;
Described three-layer network appliance carries out multicast data flow according to described multicast forwarding list item and transmits.
The described VLAN of going into is connected with the network side upper layer device; Described reception VLAN is connected with user side.
Described three-layer network appliance is set up the multicast forwarding list item and is specifically comprised according to going into VLAN and receiving VLAN of request message that is received and configuration:
Described three-layer network appliance receives the reception request message that user terminal sends;
Described three-layer network appliance is resolved described request message by related protocol;
Described three-layer network appliance is set up the multicast forwarding list item according to going into VLAN and receiving VLAN of protocol massages content that is resolved to and described configuration.
The content of the described protocol massages that is resolved to by related protocol comprises: send the port numbers of the user terminal of described request message, the sign of affiliated VLAN; Port numbers of going into VLAN that is connected with VLAN under the described user terminal and the sign of going into VLAN; And multicast group destination address.
Described related protocol comprises snoop protocol and internet group management protocol, and described snoop protocol comprises the Internet multicast management snoop protocol IGMP Snooping and multicast detectaphone exploration agreement MLD Snooping.
The described multicast forwarding list item of setting up specifically comprises:
When the port that receives VLAN is received message packet, the port address of receiving message packet is joined the port set that receives VLAN; When the port of going into VLAN is received message packet, the port address of receiving message packet is joined port set into VLAN; And set up described port set, go into VLAN, the corresponding relation of upper layer device connectivity port.
Also comprise after setting up the multicast forwarding list item:
When all of the port in all of the port in determining VLAN and the reception VLAN all leaves, delete described multicast forwarding list item.
Describedly determine that leaving situation into VLAN and the port that receives VLAN comprises: receive the leave group message message that user terminal sends; Or confiscate the message packet that user terminal sends in the certain hour.
Described three-layer network appliance carries out the sign change that the multicast data flow repeating process further comprises VLAN according to described multicast forwarding list item:
When message packet is transmitted to upper layer device from going into VLAN, described message packet is received the VLAN sign replace with into VLAN and identify;
When upper layer device when receiving VLAN forwarding inquiries message, the VLAN sign is replaced with corresponding reception VLAN sign.
The three-layer network appliance that the present invention also provides a kind of multicast data flow travelling across VLAN to transmit also comprises: VLAN dispensing unit and multicast management unit;
Described VLAN dispensing unit connects described multicast management unit, and the multicast of configuration three-layer network appliance flows into VLAN and multicast data flow receives VLAN;
Described multicast management unit links to each other with described VLAN dispensing unit, process is gone into the request message of VLAN and reception VLAN and resolves, and set up the multicast forwarding list item according to going into VLAN and receiving VLAN of protocol massages content that is resolved to and described configuration.
Also comprise VLAN sign converting unit, connect described multicast management unit, when message packet is transmitted to upper layer device from going into VLAN, described message packet is received the VLAN sign replace with into VLAN and identify; When upper layer device when receiving VLAN forwarding inquiries message, the VLAN sign is replaced with corresponding reception VLAN sign.
Also comprise multicast forwarding list item removal slip unit, connect described multicast management unit, when all of the port of determining reception VLAN all leaves, described reception VLAN is deleted from the outgoing interface information of described multicast management unit; When all of the port in going into VLAN and reception VLAN all leave, the described multicast forwarding list item of deletion from described multicast management unit.
The request message that described multicast management unit is gone into VLAN and reception VLAN by related protocol to process is resolved.
Described related protocol comprises snoop protocol and internet group management protocol, and described snoop protocol comprises the Internet multicast management snoop protocol IGMP Snooping and multicast detectaphone exploration agreement MLD Snooping.
Compared with prior art, the present invention has the following advantages:
The present invention safeguards the multicast forwarding list item by the reception VLAN that goes into VLAN and multicast data flow of configuration multicast data flow according to the protocol massages that is resolved to, and realizes the multicast data flow forwarding.Make that the maintenance of multicast forwarding list item is simpler, principle is also more short and sweet, and configuration is simple, and can reduce the resource consumption that the travelling across VLAN multicast data flow is transmitted.
Description of drawings
Fig. 1 is with multicast forwarding structural representation in the VLAN in a kind of prior art;
Fig. 2 is the embodiment flow chart of the multicast data flow travelling across VLAN retransmission method of a kind of three-layer network appliance of the present invention;
Fig. 3 is that the present invention realizes that multicast flows into VLAN/ reception VLAN schematic diagram is set;
Fig. 4 is the multicast forwarding list item schematic diagram that the present invention sets up;
Fig. 5 realizes the protocol message transmission structure chart among the present invention;
Fig. 6 is the example structure figure of the three-layer network appliance of a kind of multicast data flow travelling across VLAN forwarding of the present invention.
Embodiment
The invention provides a kind of embodiment of multicast data flow travelling across VLAN retransmission method of three-layer network appliance, for snoop protocol is realized the situation that the multicast data flow travelling across VLAN is transmitted, but embodiments of the invention are not limited thereto agreement, and for example internet group management protocol can be realized multicast data flow travelling across VLAN forwarding of the present invention equally.
As shown in Figure 2, may further comprise the steps:
Step s201, the multicast of configuration three-layer network appliance flows into VLAN and multicast data flow receives VLAN.
The method of configuration VLAN is: the VLAN that links to each other with the network side router is set to into VLAN, and the VLAN continuous with being connected user side is set to receive VLAN.
Wherein, go into VLAN and receive VLAN and must before forwarding multicasting stream, determine, such as when networking is planned, just determining into VLAN and receiving VLAN.
In addition, each multicast forwarding list item can only have one to go into VLAN.Have only and go into the multicast data flow that VLAN enters from this and can be forwarded, even other VLAN link to each other with the network side router, but because it is not set to into VLAN, therefore the multicast data flow that is entered by these VLAN is dropped.The RPF (Reversal Path Forwarding, reverse path is transmitted) that this method of present embodiment is similar to three layers of multicast routing protocol checks, prevents that the recipient from receiving many parts of multicast data flows on the same group.
Each multicast forwarding list item can have a plurality of reception VLAN, and multicast data flow enters three-layer network appliance from going into VLAN, is forwarded to the member port of all reception VLAN.
As shown in Figure 3, IGMP and PIM (PIM-SM/PIM-DM) have been disposed on the interface of the router that is connected with three-layer network appliance, three-layer network appliance is connected with router by VLAN100, is connected with user terminal 1, is connected with user terminal 4, is connected with user terminal 2 by VLAN400 with user terminal 3 by VLAN300 by VLAN200.
According to definite principle of going into VLAN and reception VLAN, for each VLAN shown in Figure 3, VLAN100 is set to into VLAN, and VLAN200, VLAN300, VLAN400 are set to receive VLAN.Suppose that user terminal 1 sends a request message to three-layer network appliance by VLAN400 by VLAN200, user terminal 2, requires to add a certain multicast group; After router receives this request, transmit corresponding multicast data flow and enter three-layer network appliance by VLAN100, transmit needed multicast data flow to the VLAN200 and the VLAN400 that have user terminal to add, user terminal 3 among the VLAN300 and user terminal 4 are all less than sending a request message to three-layer network appliance, promptly do not have the user of VLAN300 to add multicast, so multicast data flow is not transmitted to VLAN300.
Step s202, three-layer network appliance is set up the multicast forwarding list item according to going into VLAN and receiving VLAN of snoop protocol and configuration.
Three-layer network appliance receives the reception request message that user terminal sends; Three-layer network appliance is spied upon the reception request message by snoop protocol, according to protocol massages content of being spied upon and configuration go into VLAN and receive VLAN to set up the multicast forwarding list item, as shown in Figure 4.Wherein, snoop protocol comprises IGMP Snooping agreement or MLD Snooping (Multicast Listener Discovery, the multicast detectaphone is explored) agreement.
When snoop protocol is IGMP Snooping agreement, because the maintenance of forwarding-table item is to finish according to the IGMP protocol massages, IGMP for Version1 and Version2, because the source address of designated multicast stream not in the protocol massages, so the multicast data flow forwarding-table item that generates can not be determined the source address of multicast data flow equally, can only create (
*, G) forwarding-table item, the forwarding of multicast data flow according to (
*, G) transmit; For the IGMP of Version3, specified the source address that adds or leave multicast group in the protocol massages, so can generate the forwarding-table item that comprises source address information, the forwarding of multicast data flow can be according to (S, G) precise relay.
IGMP with Version1 and Version2 is an example, receives the report message of IGMP from receiving some ports that VLAN/ goes into VLAN; The multicast group of the multicast group correspondence of establishment report message report (
*, G) forwarding-table item; Add to going into VLAN (
*, the G) incoming interface of forwarding-table item, reception VLAN is added to (
*, the G) outgoing interface of forwarding-table item; If receive the report message, the port that receives the report message is joined in the port set of VLAN from the port of going into VLAN; If receive the report message, the port of receiving the report message is added in the port set that receives VLAN from the port that receives VLAN.And then set up port set and the corresponding relation of going into VLAN and upper layer device connectivity port, form the multicast forwarding list item.
When snoop protocol is MLD Snooping agreement, when the port that receives VLAN is received multicast detectaphone report message message, the port address of receiving multicast detectaphone report message message is joined in the port set that receives VLAN; When the port of going into VLAN is received multicast detectaphone report message message, the port address of receiving multicast detectaphone report message message is joined in the port set of VLAN; And set up port set, go into VLAN, the corresponding relation between the upper layer device connectivity port, form the multicast forwarding list item.
Step s203, three-layer network appliance carry out multicast data flow according to the multicast forwarding list item and transmit.
Three-layer network appliance carries out multicast data flow when transmitting, and the router of multicast data flow from the upstream need be drawn to get off, and therefore needs to pass through the three-tier switch or the router of upstream by going into VLAN from the message of spying upon that receives that VLAN receives.
In the process of carrying out multicast forwarding, also need to keep the normal adding of multicast group and leave, therefore need and will be transparent to all reception VLAN and go from going into query message that VLAN receives, be equivalent to directly receive that from receiving VLAN query message is the same.
Need be in the process of carrying out multicast forwarding at upper layer device, go into VLAN and receive between VLAN to E-Packet, when E-Packeting, need revise the VLAN sign of message, its concrete modification method is as follows:
When the snoop protocol message is transmitted to upper layer device from going into VLAN, message need be received VLAN sign and replace with into VLAN and identify; When upper layer device when receiving VLAN forwarding inquiries message, the VLAN sign is replaced with corresponding reception VLAN sign.As shown in Figure 5, when the snoop protocol message is transmitted to upper layer device from going into VLAN100, message is received VLAN200 identify the sign that replaces with into VLAN100; When upper layer device when receiving VLAN200 forwarding inquiries message, the VLAN100 sign is replaced with corresponding reception VLAN200 sign.
Can also comprise after in step s202, setting up the multicast forwarding list item: when all member ports that receive VLAN all leave, this reception of deletion VLAN from the outgoing interface of multicast forwarding list item; When all of the port in going into VLAN and reception VLAN all leave, deletion multicast forwarding list item.Wherein, the port of going into VLAN and receiving VLAN leaves situation and comprises: when snoop protocol is IGMP Snooping agreement, receive the leave group message message that user terminal sends; Or confiscate the report message message that user terminal sends in the certain hour; When snoop protocol is MLD Snooping agreement, receive that the multicast detectaphone of user terminal transmission is finished message packet; Or confiscate the multicast detectaphone report message message that user terminal sends in the certain hour.
The present invention also provides a kind of embodiment of three-layer network appliance of multicast data flow travelling across VLAN forwarding, realizes among this embodiment that the three-layer network appliance that the multicast data flow travelling across VLAN is transmitted is a three-tier switch.As shown in Figure 6, comprising: VLAN dispensing unit 100, multicast management unit 200, VLAN sign converting unit 400 and multicast forwarding list item removal slip unit 300.
VLAN identifies converting unit 400, connects multicast management unit 200, when message packet is transmitted to upper layer device from going into VLAN, message is received the VLAN sign replace with into VLAN and identify; When upper layer device during, the VLAN sign is replaced with the reception VLAN sign of corresponding multicast data flow to the reception VLAN of multicast data flow forwarding inquiries message.
Multicast forwarding list item removal slip unit 300 connects multicast management unit 200, is used for when all of the port that receives VLAN leaves this reception VLAN being deleted from the outgoing interface information of multicast management unit 200; When all of the port in going into VLAN and reception VLAN all leave, deletion multicast forwarding list item information from multicast management unit 200.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (14)
1, a kind of multicast data flow cross-VLAN VLAN retransmission method of three-layer network appliance is characterized in that, may further comprise the steps:
The multicast of configuration three-layer network appliance flows into VLAN and multicast data flow receives VLAN;
Described three-layer network appliance is set up the multicast forwarding list item according to going into VLAN and receiving VLAN of request message that is received and described configuration;
Described three-layer network appliance carries out multicast data flow according to described multicast forwarding list item and transmits.
2, the multicast data flow travelling across VLAN retransmission method of three-layer network appliance according to claim 1 is characterized in that the described VLAN of going into is connected with the network side upper layer device; Described reception VLAN is connected with user side.
3, the multicast data flow travelling across VLAN retransmission method of three-layer network appliance according to claim 1 is characterized in that, described three-layer network appliance is set up the multicast forwarding list item and specifically comprised according to going into VLAN and receiving VLAN of request message that is received and configuration:
Described three-layer network appliance receives the reception request message that user terminal sends;
Described three-layer network appliance is resolved described request message by related protocol;
Described three-layer network appliance is set up the multicast forwarding list item according to going into VLAN and receiving VLAN of protocol massages content that is resolved to and described configuration.
4, as the multicast data flow travelling across VLAN retransmission method of three-layer network appliance as described in the claim 3, it is characterized in that the content of the described protocol massages that is resolved to by related protocol comprises: send the port numbers of the user terminal of described request message, the sign of affiliated VLAN; Port numbers of going into VLAN that is connected with VLAN under the described user terminal and the sign of going into VLAN; And multicast group destination address.
5, as the multicast data flow travelling across VLAN retransmission method of three-layer network appliance as described in claim 3 or 4, it is characterized in that, described related protocol comprises snoop protocol and internet group management protocol, and described snoop protocol comprises the Internet multicast management snoop protocol IGMP Snooping and multicast detectaphone exploration agreement MLDSnooping.
6, the multicast data flow travelling across VLAN retransmission method of three-layer network appliance according to claim 1 is characterized in that the described multicast forwarding list item of setting up specifically comprises:
When the port that receives VLAN is received message packet, the port address of receiving message packet is joined the port set that receives VLAN; When the port of going into VLAN is received message packet, the port address of receiving message packet is joined port set into VLAN; And set up described port set, go into VLAN, the corresponding relation of upper layer device connectivity port.
7, the multicast data flow travelling across VLAN retransmission method of three-layer network appliance according to claim 1 is characterized in that, also comprises after setting up the multicast forwarding list item:
When all of the port in all of the port in determining VLAN and the reception VLAN all leaves, delete described multicast forwarding list item.
8, as the multicast data flow travelling across VLAN retransmission method of three-layer network appliance as described in the claim 7, it is characterized in that, describedly determine that leaving situation into VLAN and the port that receives VLAN comprises: receive the leave group message message that user terminal sends; Or confiscate the message packet that user terminal sends in the certain hour.
9, the multicast data flow travelling across VLAN retransmission method of three-layer network appliance according to claim 1 is characterized in that, described three-layer network appliance carries out the sign change that the multicast data flow repeating process further comprises VLAN according to described multicast forwarding list item:
When message packet is transmitted to upper layer device from going into VLAN, described message packet is received the VLAN sign replace with into VLAN and identify;
When upper layer device when receiving VLAN forwarding inquiries message, the VLAN sign is replaced with corresponding reception VLAN sign.
10, a kind of three-layer network appliance of multicast data flow travelling across VLAN forwarding is characterized in that, also comprises: VLAN dispensing unit and multicast management unit;
Described VLAN dispensing unit connects described multicast management unit, and the multicast of configuration three-layer network appliance flows into VLAN and multicast data flow receives VLAN;
Described multicast management unit links to each other with described VLAN dispensing unit, process is gone into the request message of VLAN and reception VLAN and resolves, and set up the multicast forwarding list item according to going into VLAN and receiving VLAN of protocol massages content that is resolved to and described configuration.
11, the three-layer network appliance of transmitting as multicast data flow travelling across VLAN as described in the claim 10, it is characterized in that, also comprise VLAN sign converting unit, connect described multicast management unit, when message packet is transmitted to upper layer device from going into VLAN, described message packet is received the VLAN sign replace with into VLAN and identify; When upper layer device when receiving VLAN forwarding inquiries message, the VLAN sign is replaced with corresponding reception VLAN sign.
12, the three-layer network appliance of transmitting as multicast data flow travelling across VLAN as described in the claim 10, it is characterized in that, also comprise multicast forwarding list item removal slip unit, connect described multicast management unit, when all of the port of determining reception VLAN all leaves, described reception VLAN is deleted from the outgoing interface information of described multicast management unit; When all of the port in going into VLAN and reception VLAN all leave, the described multicast forwarding list item of deletion from described multicast management unit.
13, the three-layer network appliance of transmitting as multicast data flow travelling across VLAN as described in the claim 10 is characterized in that, described multicast management unit by related protocol to resolving through the request message of going into VLAN and receiving VLAN.
14, the three-layer network appliance of transmitting as multicast data flow travelling across VLAN as described in the claim 13, it is characterized in that, described related protocol comprises snoop protocol and internet group management protocol, and described snoop protocol comprises the Internet multicast management snoop protocol IGMP Snooping and multicast detectaphone exploration agreement MLD Snooping.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917351A (en) * | 2010-03-31 | 2010-12-15 | 迈普通信技术股份有限公司 | Multicasting forwarding method on router and forwarding router thereof |
| CN102244583A (en) * | 2011-07-20 | 2011-11-16 | 北京星网锐捷网络技术有限公司 | Method and network equipment for forwarding multicast streaming |
| CN101616014B (en) * | 2009-07-30 | 2012-01-11 | 中兴通讯股份有限公司 | Method for realizing cross-virtual private local area network multicast |
| CN102355358A (en) * | 2011-08-08 | 2012-02-15 | 瑞斯康达科技发展股份有限公司 | Method and device for realizing multicast |
| CN102447669A (en) * | 2010-09-30 | 2012-05-09 | 迈普通信技术股份有限公司 | Forwarding method of multimedia data streams and forwarding equipment |
| CN102457386A (en) * | 2010-10-25 | 2012-05-16 | 杭州华三通信技术有限公司 | Multicast message transmission method in bidirectional PIM (Personal Information Management) of communication equipment and communication equipment |
| CN107317740A (en) * | 2017-08-01 | 2017-11-03 | 京信通信***（中国）有限公司 | A kind of processing method and processing device of data message |
| CN110474781A (en) * | 2019-08-29 | 2019-11-19 | 视联动力信息技术股份有限公司 | A kind of method and device of transmitting multicast data |
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2006
- 2006-12-20 CN CNA2006101677382A patent/CN1996956A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101616014B (en) * | 2009-07-30 | 2012-01-11 | 中兴通讯股份有限公司 | Method for realizing cross-virtual private local area network multicast |
| CN101917351A (en) * | 2010-03-31 | 2010-12-15 | 迈普通信技术股份有限公司 | Multicasting forwarding method on router and forwarding router thereof |
| CN102447669A (en) * | 2010-09-30 | 2012-05-09 | 迈普通信技术股份有限公司 | Forwarding method of multimedia data streams and forwarding equipment |
| CN102457386A (en) * | 2010-10-25 | 2012-05-16 | 杭州华三通信技术有限公司 | Multicast message transmission method in bidirectional PIM (Personal Information Management) of communication equipment and communication equipment |
| CN102244583A (en) * | 2011-07-20 | 2011-11-16 | 北京星网锐捷网络技术有限公司 | Method and network equipment for forwarding multicast streaming |
| CN102244583B (en) * | 2011-07-20 | 2014-07-30 | 北京星网锐捷网络技术有限公司 | Method and network equipment for forwarding multicast streaming |
| CN102355358A (en) * | 2011-08-08 | 2012-02-15 | 瑞斯康达科技发展股份有限公司 | Method and device for realizing multicast |
| CN102355358B (en) * | 2011-08-08 | 2013-09-25 | 瑞斯康达科技发展股份有限公司 | Method and device for realizing multicast |
| CN107317740A (en) * | 2017-08-01 | 2017-11-03 | 京信通信***（中国）有限公司 | A kind of processing method and processing device of data message |
| CN110474781A (en) * | 2019-08-29 | 2019-11-19 | 视联动力信息技术股份有限公司 | A kind of method and device of transmitting multicast data |
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