CN100417141C - Group broadcasting business realizing method - Google Patents
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- CN100417141C CN100417141C CNB2005101242456A CN200510124245A CN100417141C CN 100417141 C CN100417141 C CN 100417141C CN B2005101242456 A CNB2005101242456 A CN B2005101242456A CN 200510124245 A CN200510124245 A CN 200510124245A CN 100417141 C CN100417141 C CN 100417141C
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Abstract
The present invention discloses a method for achieving multicast service, which is applied to communication networks adopting a virtual router redundancy protocol VRRP. The method comprises the steps that one or a plurality of VRRP groups are configured; any one multicast group and any one VRRP group are bound; a router in the VRRP group sends out received multicast data messages and multicast protocol messages to a multicast receiving device through the specified VRRP state, and the multicast protocol messages are generated by the router. The present invention achieves the multicast service by adopting a VRRP protocol, and can achieve high-speed data flow switching and make the router achieve flow rate load share.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of multicast service implementation method.
Background technology
Usually, the interior main frame of network is provided with a default route (next is jumped and is 10.100.10.1), like this, the destination address that main frame sends will not mail to router (Router) by default route at the message of this network segment, thereby realize communicating by letter of main frame and external network.Its local area network building scheme schematic diagram as shown in Figure 1.When router broke down, all were that the main frame of next jumping of default route will break and the communicating by letter of outside with this router in this network segment.
(Virtual Router Redundancy Protocol VRRP) is a kind of protocol for error tolerance to Virtual Router Redundancy Protocol.VRRP proposes for addressing the above problem, and it is local area network (LAN) (as: Ethernet) design with multicast or broadcast-capable.VRRP comprises that with the set of router of local area network (LAN) a working router (MASTER router) and several backup routers (BACKUP router) are organized into a virtual router, are referred to as a backup group.As shown in Figure 2, be virtual router networking schematic diagram.Among Fig. 2, virtual router (being backup group) has the IP address 10.100.10.1 (this IP address can be identical with the interface IP address of certain router in the backup group) of oneself, router in the backup group also has the IP address of oneself, wherein the IP address of MASTER router is 10.100.10.2, and the IP address of BACKUP router is 10.100.10.3.Main frame in the local area network (LAN) is only known the IP address 10.100.10.1 of this virtual router (being backup group), and do not know the IP address 10.100.10.2 of concrete MASTER router and the IP address 10.100.10.3 of BACKUP router, they oneself default route is set to the IP address 10.100.10.1 of this virtual router.So the main frame in the network just comes to communicate with other network by this virtual router.When if the MASTER router in the backup group breaks down, other BACKUP router in the backup group will be taken over and become new MASTER router, and the main frame that continues in network provides route service.Thereby the main frame in the realization network communicates with external network incessantly.
In the prior art, VRRP agreement itself is just with the problem that solves IP unicast.
Consideration also has multicast service, for example IP-TV simultaneously in networking shown in Figure 2.Suppose multicast source (RP) in network, multicast traffic stream can be sent to three PCs by two routers as shown in Figure 2.(Internet GroupManagement Protocol IGMP) represents to add multicast group and leave multicast group to use the Internet Group Management Protocol between three PCs and the router.In this networking, realize multicast service, need to solve following three problems:
(1), how to guarantee only to be forwarded to PC, and another router is not transmitted data flow by a router to the data flow of a multicast group?
Because if two routers are forwarding multicasting stream all, then PC can be received two same piece of data, causes confusion;
(2), how to realize that recovery is switched and switched in backup fast to the multicast group of an appointment?
Promptly will realize specifying the specific router in two routers is default multicast router, when this default router is working properly, is flowed by its multicast data forwarding; When this default router fault, can be switched to continue multicast data forwarding stream of another backup router; When fault recovery, can also switch back the default multicast router that begins appointment;
(3) when a plurality of multicast group exist simultaneously, how to realize that traffic load shares?
Be that a part of multicast group is transmitted by router-A, another part multicast group is transmitted by router B.Two routers backup each other simultaneously; In the network of reality, multicast group often has a plurality of, and the IP-TV that for example opens has 100 channels, and then meaning has 100 multicast group.
Prior art realizes that the method for multicast service is in networking structure shown in Figure 2: two routers all on Ethernet interface, move Protocol Independent Multicast Sparse Mode (Protocol IndependentMulticast-Sparse Mode, PIM-SM).Compete out a router as Designated Router (PIM-SM Designated Router) by PIM-SM.Under the normal condition, have only Designated Router to transmit all multicast data flows, and another backup router is not transmitted any data flow.
Above-mentioned prior art has solved problem (1), promptly has only a router to transmit data, and PC can not received two identical piece of data.Prior art has also solved problem (2), promptly when fault, can realize switching, but switching time slow (about ten seconds kinds).But prior art is not dealt with problems (3), can not realize that promptly the router traffic load shares.
Summary of the invention
The invention provides the method that a kind of VRRP of employing agreement realizes multicast service, in order to solve the multicast switching time length that exists in the prior art and can not realize the problem that traffic load is shared.
The inventive method is applied to adopt the communication network of Virtual Router Redundancy Protocol VRRP, comprising:
Dispose one or more VRRP groups;
With any one multicast group and any one VRRP group binding;
The multicast data message of the router transmission multicast group of binding in the described VRRP group and multicast protocol message are to the multicast receiving equipment, wherein, when the number of router in the VRRP group is two, utilize arbitrary router to send, one is the router of work MASTER state, another is the router of Status of Backups, when the number of router during greater than two, utilizes the router of operating state to send.
According to said method of the present invention, different VRRP groups include identical or different router.
According to said method of the present invention, the default working router of appointment is identical or different in the different VRRP groups.
According to said method of the present invention, when the router of operating state sent message to the multicast receiving equipment in being organized by VRRP, the step that this message sends comprised:
The described multicast receiving equipment cycle is the router transmission request adding of operating state or the report message that leaves certain multicast group to the VRRP state;
After the router of described operating state received described report message, foundation was transmitted;
According to the multicast receiving equipment of setting up that described multicast data message is transmitted to correspondence of transmitting.
According to said method of the present invention, in a VRRP group, the router that current VRRP state is a Status of Backups is intercepted the described report message that described multicast receiving equipment sends, and sets up and transmit; When the VRRP state of the router of Status of Backups becomes operating state, described multicast data message is transmitted to corresponding multicast receiving equipment according to transmitting of setting up.
According to said method of the present invention, when the VRRP state of the router of Status of Backups became operating state, the step that described multicast data message is transmitted to corresponding multicast receiving equipment specifically comprised:
The router that the VRRP state is changed into operating state sends query messages to described multicast receiving equipment;
Described multicast receiving equipment returns the response report message;
The router that described VRRP state is changed into operating state upgrades described transmitting according to the response report message that returns; And according to the multicast receiving equipment that described multicast data message is transmitted to correspondence of transmitting after upgrading.
According to said method of the present invention, use Internet Group Management Protocol IGMP to carry out interacting message between the all-router in described multicast receiving equipment and the described VRRP group.
Beneficial effect of the present invention is as follows:
(1) the present invention in multicast service, makes full use of in the network correlation function of existing VRRP agreement with the VRRP protocol application, realizes the forwarding of multicast traffic stream and switches, realize simple, cost is low.
(2) in the inventive method, the router that is in Status of Backups in the VRRP group has been set up the data forwarding table in advance by the request adding of intercepting the transmission of multicast receiving equipment or the report message that leaves multicast group; In case its VRRP state becomes operating state, can transmit the multicast traffic stream that receives immediately according to the data forwarding table of prior foundation, thereby realize the quick switching of flow.
(3) in the inventive method, with different multicast group and different VRRP group bindings, and in different VRRP groups, specify different routers as the MASTER router, and stipulate that having and only have current VRRP state in the VRRP group is Master state (Master, operating state) router sends to the receiving equipment that is connected with the data message of the multicast group of binding with protocol massages, thereby has simply solved the problem that the router traffic load is shared.
Description of drawings
Fig. 1 is the local area network building schematic diagram;
Fig. 2 is provided with schematic diagram for local area network (LAN) VRRP group;
Fig. 3 is multicast group of the present invention and VRRP group binding schematic diagram;
Fig. 4 realizes the networking schematic diagram of multicast service for the present invention.
Embodiment
The present invention adopts the VRRP agreement to realize multicast service.Implementation method is:
Dispose one or more VRRP groups;
With any one multicast group and any one VRRP group binding;
Router in the described VRRP group is according to the VRRP state of appointment, the multicast data message of the transmission multicast group of binding and multicast protocol message are to the multicast receiving equipment, and the router that is in non-appointment VRRP state does not then send the protocol massages and the data message of the multicast group of binding.Under the general situation, the VRRP state of appointment is an operating state.
Below in conjunction with accompanying drawing, the inventive method is described in detail.
As shown in Figure 3, be multicast group and VRRP group binding schematic diagram.As shown in Figure 3, suppose to have in the current network M platform router, can dispose this M platform router and belong to M VRRP group, be respectively VRRP group 1, VRRP group 2, VRRP group 3 ..., VRRP organizes M; Wherein, the default working router of VRRP group 1 be the default working router of router one, VRRP group 2 be the default working router of router two, VRRP group 3 be router three ..., the default working router of VRRP group M is router M.Suppose need to relay N multicast group, be respectively multicast group 1, multicast group 2, multicast group 3 ..., multicast group N.In the inventive method, each multicast group and each VRRP group are bound.As shown in Figure 3:
Multicast group 3 and VRRP group 2 are bound;
......；
Multicast group N and VRRP group M are bound.
In the above-mentioned binding mode, different multicast group can with different VRRP group bindings, with can with same VRRP group binding; In Fig. 3, multicast group 2 and multicast group 3 are all bound with VRRP group 2.
In the present invention, different VRRP groups can comprise identical or different router.For example: VRRP group 1 comprises router one and router two; Wherein router one is the MASTER router, and router two is the BACKUP router;
VRRP group 2 comprises router two and router three; Wherein router two is the MASTER router, and router three is the BACKUP router;
......；
VRRP group M comprises whole M platform routers; Wherein router M is the MASTER router, and all the other routers all are the BACKUP router.
Concrete networking structure schematic diagram as shown in Figure 4.Fig. 4 represents that X is arranged (X is any positive integer) platform multicast receiving equipment (comprising router, BAS Broadband Access Server, Ethernet switch, set-top box, digital television or the like) is connected with multicast source in the network by M platform router.According to the setting of binding mode shown in Figure 3 and above-mentioned VRRP group, then among Fig. 4:
Router one and router two are formed VRRP group 1, the multicast traffic stream of forwarding multicasting group 1;
Router two and router three are formed VRRP group 2, the multicast traffic stream of forwarding multicasting group 2 and multicast group 3;
......；
All M platform router is formed VRRP group M, the multicast traffic stream of forwarding multicasting group M.
Concrete multicast traffic stream repeating process is as follows:
Suppose the data flow of the current broadcast multicast group 1 of multicast source, then MASTER router (router one) work of VRRP group 1 sends to the multicast receiving equipment that is connected with the multicast data message that receives with the multicast protocol message that oneself produces; After router one receives the report message (as IGMP Report) that the multicast receiving equipment returns, set up the data forwarding table, the multicast data message that receives is transmitted to corresponding receiving equipment.For example: if multicast receiving equipment 1 and multicast receiving equipment 2 have returned report message, request adds this multicast group, and then router one sends to multicast receiving equipment 1 and multicast receiving equipment 2 with the multicast traffic stream that receives.If the router one fault, then according to the function of VRRP group, backup router 2 will become new MASTER router, continue data flow and transmit.
In like manner, if the data flow of current broadcast multicast group 2 of multicast source or multicast group 3, then the multicast receiving equipment that the multicast protocol message that receives sends to connection is transmitted in MASTER router (router two) work of VRRP group 2; After router two receives the report message (as IGMP Report) that the multicast receiving equipment returns, set up the data forwarding table, the multicast data message that receives is transmitted to corresponding receiving equipment.For example: if multicast receiving equipment 2 and multicast receiving equipment X have returned report message, request adds this multicast group, and then router two sends to multicast receiving equipment 2 and multicast receiving equipment X with the multicast traffic stream that receives.If the router two fault, then according to the function of VRRP group, backup router 3 will become new MASTER router, continue data flow and transmit.
In like manner, if the data flow of the current broadcast multicast group of multicast source M, then the multicast receiving equipment that the multicast protocol message that receives sends to connection is transmitted in MASTER router (router M) work of VRRP group M; After router M receives the report message (as IGMP Report) that the multicast receiving equipment returns, set up the data forwarding table, the multicast data message that receives is transmitted to corresponding receiving equipment.For example: if multicast receiving equipment 1 and multicast receiving equipment M have returned report message, request adds this multicast group, and then router M sends to multicast receiving equipment 1 and multicast receiving equipment M with the multicast traffic stream that receives.If router M fault, then according to the function of VRRP group, other backup router is according to the priority that sets in advance, and the backup router that its medium priority is the highest continues data flow and transmits as new MASTER router.
In above-mentioned data flow repeating process, the MASTET router then upgrades the data forwarding table if receive the report message that certain multicast group is left in the request of multicast receiving equipment cycle transmission, and sends data flow to corresponding receiving equipment according to transmitting after upgrading.
In above-mentioned data flow repeating process, the router that current VRRP state is a Status of Backups is intercepted the report message that the multicast receiving equipment sends, and sets up this locality and transmit; When its VRRP state becomes operating state, according to the receiving equipment of setting up that described multicast data message is transmitted to correspondence of transmitting; So just realized the quick switching of data flow, general switching time was less than 1 second.
When the VRRP state is that the router of Status of Backups is when changing operating state into, can also initiatively initiate the multicast route protocol message, for example: IGMP Query (IGMP Query message), the multicast receiving equipment that is connected to this interface can return the response report message, for example: IGMP Report; Router upgrades transmitting of setting up when intercepting according to the response report message that returns, and according to transmitting after upgrading described multicast data message is transmitted to corresponding receiving equipment, thereby has guaranteed the correct forwarding of flux of multicast data.
In addition, because different VRRP group can specify different routers as default MASTER router, like this, the data flow of a plurality of multicast group is transmitted can carry out load sharing by different routers, has solved the problem that traffic load is shared in the multicast service effectively.
In the above-mentioned data flow repeating process, be that to carry out data forwarding with the MASTER router be example; If two routers (is the MASTER router, and another be the BACKUP router) are only arranged in VRRP group, then also can specify by the BACKUP router and carry out data forwarding (being that the state of router is transmitted the data flow of reception during for Status of Backups).If the router in a VRRP organizes is more than two, the router that then is in Status of Backups is with regard to more than one, if transmit data when the VRRP state is set for Status of Backups, then can there be a plurality of routers problem of multicast data forwarding stream simultaneously, make the multicast receiving equipment receive many piece of data simultaneously, cause confusion; Therefore, in this case, multicast data forwarding stream when the state that router in the VRRP group can only be set is operating state.
In sum, the present invention in multicast service, makes full use of in the network function of existing VRRP group with the VRRP protocol application, realizes the forwarding of multicast traffic stream and switches.And make the router that is in Status of Backups in the VRRP group by the request adding of intercepting the transmission of multicast receiving equipment or the report message that leaves multicast group, set up the data forwarding table in advance; In case its VRRP state becomes operating state, can transmit the multicast traffic stream that receives immediately according to the data forwarding table of prior foundation, realized the quick switching of flow.Simultaneously, when router when Status of Backups changes operating state into, by sending query messages immediately, the response report message that returns according to receiving equipment upgrades to be transmitted, and has guaranteed the correct forwarding of flux of multicast data.
The present invention is also by with different multicast group and different VRRP group bindings, and the different router of appointment makes router realize that traffic load shares as the MASTER router in different VRRP groups.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1. multicast service implementation method is applied to adopt the communication network of Virtual Router Redundancy Protocol VRRP, it is characterized in that, comprising:
Dispose one or more VRRP groups;
With any one multicast group and any one VRRP group binding;
The multicast data message of the router transmission multicast group of binding in the described VRRP group and multicast protocol message are to the multicast receiving equipment, wherein, when the number of router in the VRRP group is two, utilize arbitrary router to send, one is the router of work MASTER state, another is the router of Status of Backups, when the number of router during greater than two, utilizes the router of operating state to send.
2. the method for claim 1 is characterized in that, different VRRP groups include identical or different router.
3. method as claimed in claim 1 or 2 is characterized in that, the default working router of appointment is identical or different in the different VRRP groups.
4. the method for claim 1 is characterized in that, when the router of operating state sent message to the multicast receiving equipment in being organized by VRRP, the step that this message sends comprised:
The described multicast receiving equipment cycle is the router transmission request adding of operating state or the report message that leaves certain multicast group to the VRRP state;
After the router of described operating state received described report message, foundation was transmitted;
According to the multicast receiving equipment of setting up that described multicast data message is transmitted to correspondence of transmitting.
5. method as claimed in claim 4 is characterized in that, in a VRRP group, the router that current VRRP state is a Status of Backups is intercepted the described report message that described multicast receiving equipment sends, and sets up and transmit; When the VRRP state of the router of Status of Backups becomes operating state, described multicast data message is transmitted to corresponding multicast receiving equipment according to transmitting of setting up.
6. method as claimed in claim 5 is characterized in that, when the VRRP state of the router of Status of Backups became operating state, the step that described multicast data message is transmitted to corresponding multicast receiving equipment specifically comprised:
The router that the VRRP state is changed into operating state sends query messages to described multicast receiving equipment;
Described multicast receiving equipment returns the response report message;
The router that described VRRP state is changed into operating state upgrades described transmitting according to the response report message that returns; And according to the multicast receiving equipment that described multicast data message is transmitted to correspondence of transmitting after upgrading.
7. as claim 4,5 or 6 described methods, it is characterized in that, use Internet Group Management Protocol IGMP to carry out interacting message between the all-router in described multicast receiving equipment and the described VRRP group.
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| CNB2005101242456A CN100417141C (en) | 2005-11-29 | 2005-11-29 | Group broadcasting business realizing method |
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| CNB2005101242456A CN100417141C (en) | 2005-11-29 | 2005-11-29 | Group broadcasting business realizing method |
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| CN100417141C true CN100417141C (en) | 2008-09-03 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100558111C (en) | 2007-02-05 | 2009-11-04 | 华为技术有限公司 | Metro Ethernet provides reliability processing method and the system under the multi-service networking |
| CN101035009A (en) | 2007-03-31 | 2007-09-12 | 华为技术有限公司 | Multicast traffic redundancy protection method and device |
| CN101286863B (en) * | 2007-04-10 | 2012-06-06 | 中兴通讯股份有限公司 | Implementing system and method of multicast application service based on MPLS |
| CN101094102B (en) * | 2007-07-18 | 2010-06-02 | 杭州华三通信技术有限公司 | Main and standby switching method and route standby system for route device |
| CN101409629B (en) * | 2007-10-10 | 2012-03-07 | 华为技术有限公司 | Method, apparatus and system for establishing multicast transmission path and implementing multicast transmission |
| CN101599841A (en) * | 2008-06-03 | 2009-12-09 | 华为技术有限公司 | Realize method, router and the system of multicast |
| CN101321077B (en) * | 2008-07-18 | 2011-02-02 | 华为技术有限公司 | Reliable multicast method, provider edge upper layer device and system |
| CN101651609A (en) * | 2008-08-14 | 2010-02-17 | 华为技术有限公司 | Method and device for realizing multicast load sharing |
| CN101572675B (en) * | 2009-06-23 | 2012-01-04 | 杭州华三通信技术有限公司 | Method for finding operating VRRP network equipment in directly connected network segment and device thereof |
| CN102104488B (en) * | 2009-12-22 | 2013-03-13 | 华为技术有限公司 | Multicast message processing method and device |
| CN107547367B (en) * | 2017-06-28 | 2020-04-28 | 新华三技术有限公司 | Multicast switching method, device and machine readable storage medium |
| CN109495773B (en) * | 2019-01-11 | 2021-05-11 | 鼎点视讯科技有限公司 | Multicast traffic configuration method and device and electronic equipment |
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