CN102651693B - Two stack multi-cast system and two stack method of multicasting thereof - Google Patents
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Abstract
The invention discloses a kind of two stack multi-cast systems and two stack method of multicasting thereof, comprise the equipment of the one or more IPv4 of having agreement, one or more equipment, a status poll unit and multicast group administrative unit with IPv6 agreement; Wherein said status poll unit sends the query message of MLD agreement and IGMP agreement respectively; The equipment of the described IPv4 of having agreement sends the report message of IGMP agreement or leaves message, described in there is IPv6 agreement equipment send the report message of MLD agreement or leave message; IPv4 multicast group address and MAC Address are added one first multicast group or delete from described first multicast group by described multicast group administrative unit; IPv6 multicast group address and MAC Address are added described first multicast group or delete from described first multicast group by described multicast group administrative unit.The present invention realizes the fusion of IPv4 and IPv6 multicast by compatible IPv4 and IPv6 multicast.
Description
Technical field
The present invention relates to a kind of two stack multi-cast systems and two stack method of multicasting thereof, particularly relate to two stack multi-cast system of a kind of EPON (ethernet passive optical network) equipment and two stack method of multicasting thereof.
Background technology
IP (agreement interconnected between the network) application of Multicast Routing technology in EPON system is more and more extensive in recent years, because multicasting technology effectively can solve the problem that single-point sends multipoint reception, so be all widely used in resource discovering, multimedia conferencing, data copy, real time data transmission and all many-sides such as game and emulation.
Traditional IP communication comprises clean culture and broadcast two kinds of modes.If a data will be sent to the multiple users in network, then not adopt broadcast mode, packet is flooded to all user ports, adopts mode of unicast exactly, send a packet by source server respectively to each user in network.When adopting broadcast mode to realize, not only information can be sent to unwanted main frame and waste bandwidth, also may cause serious broadcast storm due to route loopback; Adopt mode of unicast when realizing, repeating transmission and can waste massive band width due to IP bag, too increases the load of server.So traditional clean culture and broadcast communication mode all effectively can not solve the problem that single-point sends multipoint reception.
IP multicast refers to and in an ip network packet is sent to certain in network subset of determining in the mode of doing one's best, and this subset is called multicast group.The basic thought of IP multicast is, data server only sends a data, and the destination address in this number certificate is address in multicast group; All recipients in multicast group can receive same data copy, and only have the main frame in multicast group just can receive these data, and in network, other main frames can not receive this packet.
Current most of IP multicast realizes under IPv4 (Internet Protocol Version 4), but because the Internet is flourish, IPv4 address cannot meet the demand of the Internet, so the fusion of IPv4 and IPv6 (IPv6) is also imperative.What IPv4 multicast adopted is IGMP agreement (Internet Group Management Protocol), and the employing of IPv6 multicast is MLD agreement (multicast listener discovery protocol).
Realized by MTG (multicast transfer gateway) scheme in current group pack mode, by disposing MTG at IPv4 and IPv6 network boundary place in described MTG scheme, described MTG realizes the conversion of two network multicast agreements, to realize the fusion of IPv4 and IPv6 multicast, but described MTG scheme is on the router of the third layer being applied in OSI (inventionthe open systems interconnection), realize the Multicast Routing of the cross-network segment of third layer, mainly determine multicast user according to IP address.
Summary of the invention
The technical problem to be solved in the present invention is that the integration technology of IPv4 and IPv6 multicast in order to overcome prior art all exists the defect with the third layer of OSI, a kind of two stack multi-cast systems and two stack method of multicasting thereof are provided, utilize the multicast protocol of the second layer of OSI, namely mainly determine multicast user according to MAC (medium access control) and multicast group address.
The present invention solves above-mentioned technical problem by following technical proposals:
The invention provides a kind of two stack multi-cast system that is hungry, be characterized in that described pair of stack multi-cast system comprises the equipment of the one or more IPv4 of having agreement, one or more equipment, a status poll unit and multicast group administrative unit with IPv6 agreement;
The query message that wherein said status poll unit sends MLD agreement and IGMP agreement respectively to described in there is the equipment of IPv4 agreement and there is the equipment of IPv6 agreement;
Send the report message of IGMP agreement after the equipment of the described IPv4 of having agreement receives described query message or leave message to described multicast group administrative unit, described in there is IPv6 agreement equipment receive described query message after send the report message of MLD agreement or leave message to described multicast group administrative unit;
Described multicast group administrative unit based on IGMP agreement report message or leave message, will the report message of described IGMP agreement be sent or leave the IPv4 multicast group address with the equipment of IPv4 agreement of message and MAC Address adds one first multicast group or deletes from described first multicast group;
Described multicast group administrative unit based on MLD agreement report message or leave message, will the report message of described MLD agreement be sent or leave the IPv6 multicast group address with the equipment of IPv6 agreement of message and MAC Address adds described first multicast group or deletes from described first multicast group.
Preferably, described pair of stack multi-cast system also comprises a router, after described multicast group administrative unit adds IPv4 multicast group address or IPv6 multicast group address in described first multicast group, send the report message of IGMP agreement or the report message of MLD agreement to described router;
After described multicast group administrative unit deletes IPv4 multicast group address or IPv6 multicast group address from described first multicast group, to described router send IGMP agreement leave message or MLD agreement leave message.
Preferably, the described status poll unit query message that sends MLD agreement and IGMP agreement respectively every a polling cycle to described in there is the equipment of IPv4 agreement and there is the equipment of IPv6 agreement.
Preferably, described multicast group administrative unit judge that described message is the report message of IGMP agreement by detecting the type field of message received, IGMP agreement leave message, the report message of MLD agreement or MLD agreement leave message.
Present invention also offers a kind of two stack method of multicasting, be characterized in using two stack multi-cast system as above, and comprise the following steps:
The query message that S101, described status poll unit send MLD agreement and IGMP agreement respectively to described in there is the equipment of IPv4 agreement and there is the equipment of IPv6 agreement;
S102, described in there is IPv4 agreement equipment receive described query message after send the report message of IGMP agreement or leave message to described multicast group administrative unit; Send the report message of MLD agreement after the equipment of the described IPv6 of having agreement receives described query message or leave message to described multicast group administrative unit;
S103, described multicast group administrative unit based on IGMP agreement report message or leave message, will the report message of described IGMP agreement be sent or leave the IPv4 multicast group address with the equipment of IPv4 agreement of message and MAC Address adds described first multicast group or deletes from described first multicast group; Described multicast group administrative unit based on MLD agreement report message or leave message, will the report message of described MLD agreement be sent or leave the IPv6 multicast group address with the equipment of IPv6 agreement of message and MAC Address adds described first multicast group or deletes from described first multicast group.
Preferably, described pair of stack multi-cast system also comprises a router, and described step S103 is:
Described multicast group administrative unit based on IGMP agreement report message or leave message, by sending the report message of described IGMP agreement or leaving the IPv4 multicast group address with the equipment of IPv4 agreement of message and MAC Address adds described first multicast group or deletes from described first multicast group, then send the report message of IGMP agreement to described router or leave message;
Described multicast group administrative unit based on MLD agreement report message or leave message, by sending the report message of described MLD agreement or leaving the IPv6 multicast group address with the equipment of IPv6 agreement of message and MAC Address adds described first multicast group or deletes from described first multicast group, then send the report message of MLD agreement to described router or leave message.
Preferably, described step S101 is:
The query message that described status poll unit sends MLD agreement and IGMP agreement respectively every a polling cycle to described in there is the equipment of IPv4 agreement and there is the equipment of IPv6 agreement.
Preferably, further comprising the steps of between step S102 and step S103:
By detecting the type field of message received, described multicast group administrative unit judges that described message is the report message of IGMP agreement, IGMP agreement leave message, the report message of MLD agreement or MLD agreement leave message.
Positive progressive effect of the present invention is:
Of the present invention pair of stack multi-cast system and two stack method of multicasting thereof, utilize the multicast protocol of the second layer of OSI, namely mainly determines multicast user according to MAC (medium access control) and multicast group address.In addition the fusion of IPv4 and IPv6 multicast is realized by compatible IPv4 and IPv6 multicast.And relative to existing MTG technology, the complexity of networking can be simplified.
And the present invention can also be applicable to the OLT (optical fiber cable termination equipment) in EPON, achieves the application of multicast in point-to-multipoint EPON system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment of of the present invention pair of stack multi-cast system.
Fig. 2 is the flow chart of two stack method of multicasting of the first embodiment of the present invention.
Fig. 3 is the structural representation of the second embodiment of of the present invention pair of stack multi-cast system.
Embodiment
Present pre-ferred embodiments is provided, to describe technical scheme of the present invention in detail below in conjunction with accompanying drawing.
First embodiment:
As shown in Figure 1, two stack multi-cast systems of the present embodiment comprise equipment 2, one status poll unit 3, multicast group administrative unit 4 and the router five that an equipment 1, one with IPv4 agreement has IPv6 agreement.
The equipment 1 of the wherein said IPv4 of having agreement adopts the multicast protocol of IPv4, namely uses IGMP agreement to realize multicast.And described in there is IPv6 agreement equipment 2 adopt the multicast protocol of IPv6, namely use MLD agreement to realize multicast.
Described status poll unit 3 for the query message that sends MLD agreement and IGMP agreement according to a polling cycle T respectively to described in there is the equipment 1 of IPv4 agreement and there is the equipment 2 of IPv6 agreement.So no matter can both receive corresponding query message based on the equipment of IGMP agreement or MLD agreement, namely the state of each equipment is checked in described status poll unit 3 timing, thus determines and change the group member in multicast group.
The equipment 1 then with IPv4 agreement and the equipment 2 with IPv6 agreement can send corresponding report message based on the agreement of self and the state of self or leave message.Send the report message of IGMP agreement after the equipment 1 namely with IPv4 agreement receives described query message or leave message to described multicast group administrative unit 4, described in there is IPv6 agreement equipment 2 receive described query message after send the report message of MLD agreement or leave message to described multicast group administrative unit 4.
Then, described multicast group administrative unit 4 judge that described message is the report message of IGMP agreement by detecting the type field of message received, IGMP agreement leave message, the report message of MLD agreement or MLD agreement leave message.Namely the content in the first detection messages of described multicast group administrative unit 4 in type of message field, thus distinguish the different message of each different agreement.
After this when described multicast group administrative unit 4 receives the report message of IGMP agreement or leaves message, the IPv4 multicast group address and MAC Address with the equipment 1 of IPv4 agreement added the first multicast group G or delete from described first multicast group G, then send the report message of IGMP agreement to described router five or leave message.
When described multicast group administrative unit 4 receives the report message of MLD agreement or leaves message, the IPv6 multicast group address and MAC Address with the equipment 2 of IPv6 agreement added described first multicast group G or delete from described first multicast group G, then send the report message of MLD agreement to described router five or leave message.
So the present embodiment can realize the fusion of the multicast of IPv4 and IPv6 protocol devices, and in the present embodiment, adopt multicast group address and the MAC Address agreement of equipment, be thus applicable to the multicast protocol of the OSI second layer.Relative to the multicast protocol of traditional OSI third layer, extend the method for multicast.
As shown in Figure 2, the present embodiment workflow of adopting two stack method of multicasting to be is as follows:
Step 101, the query message that described status poll unit 3 sends MLD agreement and IGMP agreement respectively every a polling cycle T to described in there is the equipment 1 of IPv4 agreement and there is the equipment 2 of IPv6 agreement.
Step 102, described in there is IPv4 agreement equipment 1 receive described query message after send the report message of IGMP agreement or leave message to described multicast group administrative unit 4; Send the report message of MLD agreement after the equipment 2 of the described IPv6 of having agreement receives described query message or leave message to described multicast group administrative unit 4.
Step 103, by detecting the type field of message received, described multicast group administrative unit 4 judges that described message is the report message of IGMP agreement, IGMP agreement leave message, the report message of MLD agreement or MLD agreement leave message.
Step 104, described multicast group administrative unit 4 based on IGMP agreement report message or leave message, the IPv4 multicast group address and MAC Address with the equipment 1 of IPv4 agreement added described first multicast group G or delete from described first multicast group G, then send the report message of IGMP agreement to described router five or leave message;
Described multicast group administrative unit 4 based on MLD agreement report message or leave message, the IPv6 multicast group address and MAC Address with the equipment 2 of IPv6 agreement added described first multicast group G or delete from described first multicast group G, then send the report message of MLD agreement to described router five or leave message.
Second embodiment:
As shown in Figure 3, the difference of two stack multi-cast system of the present embodiment and two stack multi-cast systems of the first embodiment is, the equipment 2 that 2 equipment 1 with IPv4 agreement and 2 have IPv6 agreement is also comprised in this example example, and the equipment 1 described in increasing in the present embodiment with IPv4 agreement and the equipment 2 with IPv6 agreement have identical function and structure with the parts of the same names in the first embodiment, so just repeat no more herein.
And the present embodiment is applied in an EPON system, and described status poll unit 3 and multicast group administrative unit 4 are all arranged in the OLT of described EPON system, so achieve point-to-multipoint multicast functionality in described EPON system.
In addition in the present embodiment, each has the equipment 1 of IPv4 agreement or to have the equipment 2 of IPv6 agreement identical with the two stack method of multicasting in the workflow between the status poll unit 3 be integrated in described OLT and multicast group administrative unit 4 and the first embodiment, so repeat no more herein.
Although the foregoing describe the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is defined by the appended claims.Those skilled in the art, under the prerequisite not deviating from principle of the present invention and essence, can make various changes or modifications to these execution modes, but these change and amendment all falls into protection scope of the present invention.
Claims (6)
1. a two stack multi-cast system, it is characterized in that, described pair of stack multi-cast system comprises:
The equipment of the one or more IPv4 of having agreement, one or more equipment, a status poll unit, a multicast group administrative unit and router with IPv6 agreement;
The query message that wherein said status poll unit sends MLD agreement and IGMP agreement respectively to described in there is the equipment of IPv6 agreement and there is the equipment of IPv4 agreement;
Send the report message of IGMP agreement after the equipment of the described IPv4 of having agreement receives described query message or leave message to described multicast group administrative unit, described in there is IPv6 agreement equipment receive described query message after send the report message of MLD agreement or leave message to described multicast group administrative unit;
Described multicast group administrative unit will send the report message of described IGMP agreement or leave the IPv4 multicast group address with the equipment of IPv4 agreement of message and MAC Address adds one first multicast group or deletes from described first multicast group;
Described multicast group administrative unit will send the report message of described MLD agreement or leave the IPv6 multicast group address with the equipment of IPv6 agreement of message and MAC Address adds described first multicast group or deletes from described first multicast group;
After described multicast group administrative unit adds IPv4 multicast group address or IPv6 multicast group address in described first multicast group, send the report message of IGMP agreement or the report message of MLD agreement to described router;
After described multicast group administrative unit deletes IPv4 multicast group address or IPv6 multicast group address from described first multicast group, to described router send IGMP agreement leave message or MLD agreement leave message.
2. stack multi-cast system as claimed in claim 1 two, is characterized in that, described status poll unit sends MLD agreement and IGMP agreement respectively query message every a polling cycle to described in there is the equipment of IPv6 agreement and there is the equipment of IPv4 agreement.
3. two stack multi-cast system as claimed in claim 1, it is characterized in that, by detecting the type field of message received, described multicast group administrative unit judges that described message is the report message of IGMP agreement, IGMP agreement leave message, the report message of MLD agreement or MLD agreement leave message.
4. a two stack method of multicasting, is characterized in that, uses two stack multi-cast system as claimed in claim 1, and comprises the following steps:
The query message that S101, described status poll unit send MLD agreement and IGMP agreement respectively to described in there is the equipment of IPv6 agreement and there is the equipment of IPv4 agreement;
S102, described in there is IPv4 agreement equipment receive described query message after send the report message of IGMP agreement or leave message to described multicast group administrative unit; Send the report message of MLD agreement after the equipment of the described IPv6 of having agreement receives described query message or leave message to described multicast group administrative unit;
S103, described multicast group administrative unit, by sending the report message of described IGMP agreement or leaving the IPv4 multicast group address with the equipment of IPv4 agreement of message and MAC Address adds described first multicast group or deletes from described first multicast group, then send the report message of IGMP agreement to described router or leave message; Described multicast group administrative unit, by sending the report message of described MLD agreement or leaving the IPv6 multicast group address with the equipment of IPv6 agreement of message and MAC Address adds described first multicast group or deletes from described first multicast group, then sends the report message of MLD agreement to described router or leaves message.
5. two stack method of multicasting as claimed in claim 4, it is characterized in that, described step S101 is:
The query message that described status poll unit sends MLD agreement and IGMP agreement respectively every a polling cycle to described in there is the equipment of IPv6 agreement and there is the equipment of IPv4 agreement.
6. two stack method of multicasting as claimed in claim 4, is characterized in that, further comprising the steps of between step S102 and step S103:
By detecting the type field of message received, described multicast group administrative unit judges that described message is the report message of IGMP agreement, IGMP agreement leave message, the report message of MLD agreement or MLD agreement leave message.
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| CN101047607A (en) * | 2006-06-01 | 2007-10-03 | 华为技术有限公司 | System and method for implementing multicast service |
| CN101047444A (en) * | 2006-04-28 | 2007-10-03 | 华为技术有限公司 | Method for optical network unit depart from multicast set in passive optical network system |
| CN102325034A (en) * | 2011-05-25 | 2012-01-18 | 太仓市同维电子有限公司 | Packet-broadcasting controlling system and control method based on IGMP/MLD multicast control protocol |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101047444A (en) * | 2006-04-28 | 2007-10-03 | 华为技术有限公司 | Method for optical network unit depart from multicast set in passive optical network system |
| CN101047607A (en) * | 2006-06-01 | 2007-10-03 | 华为技术有限公司 | System and method for implementing multicast service |
| CN102325034A (en) * | 2011-05-25 | 2012-01-18 | 太仓市同维电子有限公司 | Packet-broadcasting controlling system and control method based on IGMP/MLD multicast control protocol |
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