CN104601478A - Method and device for constructing message forwarding, sending, receiving and multicasting paths - Google Patents

Method and device for constructing message forwarding, sending, receiving and multicasting paths Download PDF

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Publication number
CN104601478A
CN104601478A CN201410842999.4A CN201410842999A CN104601478A CN 104601478 A CN104601478 A CN 104601478A CN 201410842999 A CN201410842999 A CN 201410842999A CN 104601478 A CN104601478 A CN 104601478A
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China
Prior art keywords
multicast group
access device
message
address
multicast
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CN201410842999.4A
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Chinese (zh)
Inventor
张军林
庄顺万
谢经荣
宋玉金
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Beijing Huawei Langxin Technology Co Ltd
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Beijing Huawei Langxin Technology Co Ltd
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Priority to CN201410842999.4A priority Critical patent/CN104601478A/en
Publication of CN104601478A publication Critical patent/CN104601478A/en
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Abstract

The invention provides method and device for message forwarding, sending, receiving and multicasting paths. The multicast group adding message forwarding method comprises the steps of acquiring a multicast group adding message through a router reflector from a first access device which is connected with the route reflector; modifying the publishing end address included in the multicast group adding message into the address of the route reflector; storing the address of the first access device into a multicast list as an output interface address, wherein the multicast group and the output interface address corresponding to the multicast group are recorded in the multicast list; searching a route reflector list; determining a second access device to which the multicast group adding message is to be reflected; forwarding the modified multicast group adding message to the second access device. With the adoption of the method or device, the complexity at the constructing of the multicasting path is reduced, and the consumption of hardware resources can be reduced.

Description

Message forwarding, transmission, reception, multicast path method for building up and device
Technical field
The application relates to the communications field, particularly relates to the forwarding of a kind of message, transmission, reception, multicast path method for building up and device.
Background technology
IP network transfer of data mainly contains three kinds of modes, is respectively clean culture, multicast and broadcast mode.
Clean culture (Unicast) mode can realize point-to-point network and connect between sender and each recipient.If a sender transmits identical data to multiple recipients simultaneously, the identical data packet of many parts also must be copied accordingly.If when having a large amount of main frame to wish the same portion copy obtaining packet, overburden, postpone long, network congestion will to cause sender.
Broadcast (Broadcast) mode refers to broadcast data packet in IP subnet, and all main frames in subnet inside all will receive these packets.Broadcast means that network delivers a packet to each main frame of subnet, no matter whether these main frames are happy to receive this packet.Therefore, broadcast mode is unfavorable for carrying out data interaction with special object, and wastes a large amount of bandwidth.
Multicast (Multicast) mode solves clean culture and the inefficient problem of broadcast mode.When certain user's demand customizing messages in network, multicast source (i.e. multicast information sender) only sends primary information, multicast router is that multicast packet sets up tree-shaped route by multicast routing protocol, and the information be passed just starts to copy and distribute in fork on the road far away as far as possible.
Before transmission multicast message, first can set up multicast path.Briefly, multicast path refers to the multicast message path that each device forwards of process is formed in multicast procedures.
In prior art, set up the process of multicast path, usually need to run independent multicast routing protocol, such as Protocol Independent Multicast (Protocol Independent Multicast, PIM) agreement.Which increase the complexity setting up multicast path, and additionally can consume relevant hardware resource.
Summary of the invention
The object of the application is to provide the forwarding of a kind of message, transmission, reception, multicast path method for building up and device, Border Gateway Protocol (Border Gateway Protocol can be utilized, BGP), set up multicast path, reduce the complexity setting up multicast path, reduce the consumption for hardware resource.
For achieving the above object, this application provides following scheme:
According to the first possible implementation of the first aspect of the application, the application provides a kind of multicast group to add message forwarding method, comprising:
Router Reflector obtains the multicast group that the first access device of being connected with described Router Reflector sends and adds message;
Described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message;
The address of described first access device is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Search route reflection list, determine to need described multicast group to add message reflection the second access device extremely;
Amended described multicast group is added message and is forwarded to described second access device.
In conjunction with the implementation that the second of first aspect is possible, describedly amended described multicast group is added before message is forwarded to described second access device, also comprises:
From described second access device, determine not receive the 3rd access device that described amended described multicast group adds message;
Send described amended described multicast group to described 3rd access device and add message.
According to the first possible implementation of the second aspect of the application, the application provides a kind of multicast group to add message receival method, comprising:
The multicast group that second access device obtains Router Reflector transmission adds message;
Identify that described multicast group adds the virtual private network mark and destination address comprised in message;
Judge whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described second access device, and described destination address is positioned at the downstream of described second access device;
If so, then described multicast group is added message and be forwarded to the upstream device be connected with described second access device according to the mode that head end copies.
In conjunction with the implementation that the second of second aspect is possible, the described message that described multicast group added is forwarded to the upstream device be connected with described second access device according to the mode that head end copies, specifically comprise:
Described multicast group is added the address that described second access device is revised as in the publishing side address comprised in message;
The address of described Router Reflector is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Amended described multicast group is added message and is forwarded to described upstream device.
According to the first possible implementation of the third aspect of the application, the application provides a kind of multicast group to add message method, comprising:
The multicast group that first access device obtains upstream equipment transmission adds message;
Identify that described multicast group adds the virtual private network mark and destination address comprised in message;
Judge whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described first access device, and described destination address is positioned at the downstream of described first access device;
If so, then described multicast group is added message and be forwarded to the Router Reflector be connected with described first access device according to the mode that head end copies.
In conjunction with the implementation that the second of the third aspect is possible, the described message that described multicast group added is forwarded to the Router Reflector be connected with described first access device according to the mode that head end copies, specifically comprise:
Described multicast group is added the address that described first access device is revised as in the publishing side address comprised in message;
The address of described upstream equipment is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Amended described multicast group is added message and is forwarded to described Router Reflector.
According to the first possible implementation of the fourth aspect of the application, the application provides a kind of method for building up of multicast path, comprising:
First access device sends multicast group to the Router Reflector be connected with described first access device and adds message;
Described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message by described Router Reflector;
The address of described first access device is saved to multicast list as outgoing interface address by described Router Reflector; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Described Router Reflector searches route reflection list, and determining needs described multicast group to add message reflection the second access device extremely;
Amended described multicast group is added message and is forwarded to described second access device by described Router Reflector;
Amended multicast group described in described second access device identification adds the virtual private network mark and destination address that comprise in message;
Described second access device judges whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described second access device, and described destination address is positioned at the downstream of described second access device;
If so, then described amended multicast group is added message and be forwarded to the upstream device be connected with described second access device according to the mode that head end copies.
According to the first possible implementation of the 5th aspect of the application, the application provides a kind of multicast group to add message transmission device, comprising:
Acquiring unit, the multicast group sent for obtaining the first access device of being connected with described Router Reflector adds message;
Processing unit, for adding the address that described Router Reflector is revised as in the publishing side address comprised in message by described multicast group;
The address of described first access device is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Search route reflection list, determine to need described multicast group to add message reflection the second access device extremely;
Transmitting element, is forwarded to described second access device for amended described multicast group is added message.
In conjunction with the implementation that the second of the 5th aspect is possible, described processing unit also for:
Amended described multicast group is being added before message is forwarded to described second access device, from described second access device, determining not receive the 3rd access device that described amended described multicast group adds message;
Described transmitting element, also adds message for sending described amended described multicast group to described 3rd access device.
According to the first possible implementation of the 6th aspect of the application, the application provides a kind of multicast group to add message receiving apparatus, comprising:
Acquiring unit, the multicast group sent for obtaining Router Reflector adds message;
Processing unit, for identifying that described multicast group adds the virtual private network mark and destination address comprised in message;
Judge whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described second access device, and described destination address is positioned at the downstream of described second access device, obtains judged result;
Transmitting element, during for representing when described judged result certainly, adding message and being forwarded to the upstream device be connected with described second access device according to the mode that head end copies by described multicast group.
In conjunction with the implementation that the second of the 6th aspect is possible, described transmitting element, specifically for:
Described multicast group is added the address that described second access device is revised as in the publishing side address comprised in message;
The address of described Router Reflector is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Amended described multicast group is added message and is forwarded to described upstream device.
According to the first possible implementation of the 7th aspect of the application, the application provides a kind of multicast group to add message dispensing device, comprising:
Acquiring unit, the multicast group sent for obtaining upstream equipment adds message;
Processing unit, for identifying that described multicast group adds the virtual private network mark and destination address comprised in message;
Judge whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described first access device, and described destination address is positioned at the downstream of described first access device, obtains judged result;
Transmitting element, during for representing when described judged result certainly, then adds message and is forwarded to the Router Reflector be connected with described first access device according to the mode that head end copies by described multicast group.
In conjunction with the implementation that the second of the 7th aspect is possible, described transmitting element, specifically for:
Described multicast group is added the address that described first access device is revised as in the publishing side address comprised in message;
The address of described upstream equipment is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Amended described multicast group is added message and is forwarded to described Router Reflector.
According to the first possible implementation of the eighth aspect of the application, what the application provided a kind of multicast path sets up system, comprising:
First access device, the second access device and Router Reflector;
Described first access device sends multicast group to the described Router Reflector be connected with described first access device and adds message;
Described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message by described Router Reflector;
The address of described first access device is saved to multicast list as outgoing interface address by described Router Reflector; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Described Router Reflector searches route reflection list, and determining needs described multicast group to add message reflection described second access device extremely;
Amended described multicast group is added message and is forwarded to described second access device by described Router Reflector;
Amended multicast group described in described second access device identification adds the virtual private network mark and destination address that comprise in message;
Described second access device judges whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described second access device, and described destination address is positioned at the downstream of described second access device;
If so, then described amended multicast group is added message and be forwarded to the upstream device be connected with described second access device according to the mode that head end copies.
According to the specific embodiment that the application provides, this application discloses following technique effect:
Message forwarding disclosed in the present application, transmission, reception, multicast path method for building up or device, by improving the message processing flow of the Router Reflector adopted in the network of bgp protocol, Router Reflector is set after the multicast group getting the first access device transmission adds message, described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message; The address of described first access device is saved to multicast list as outgoing interface address; Again amended described multicast group is added message and be forwarded to the second access device recorded in route reflection list; Based on bgp protocol, the foundation of multicast path can be realized, and independent multicast routing protocol need not be run in addition, thus the complexity setting up multicast path can be reduced, reduce the consumption for hardware resource.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the network architecture schematic diagram of the application scenarios of the application;
Fig. 2 is the flow chart that the multicast group of the application adds message forwarding method embodiment 1;
Fig. 3 is the flow chart that the multicast group of the application adds message forwarding method embodiment 2;
Fig. 4 is the flow chart that the multicast group of the application adds message receival method embodiment;
Fig. 5 is the flow chart that the multicast group of the application adds message method embodiment;
Fig. 6 is the signaling diagram of the method for building up embodiment of the multicast path of the application;
Fig. 7 is the structure chart that the multicast group of the application adds message transmission device embodiment;
Fig. 8 is the structure chart that the multicast group of the application adds message receiving apparatus embodiment;
Fig. 9 is the structure chart that the multicast group of the application adds message dispensing device embodiment;
Figure 10 is the structure chart of the computing node of the application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, be clearly and completely described the technical scheme in the embodiment of the present application, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
For enabling above-mentioned purpose, the feature and advantage of the application more become apparent, below in conjunction with the drawings and specific embodiments, the application is described in further detail.
The present invention is mainly used in the network adopting Border Gateway Protocol (Border Gateway Protocol, BGP).
Inventor finds through research, and in bgp protocol, the router sending BGP message is called BGP speaker (BGP Speaker), and it receives or produces new routing iinformation, and issues (Advertise) to other BGP speaker.When BGP speaker receives the new route from other autonomous system, if this route is more excellent than current known route or current also not this route, it is just distributed to other BGP speaker all in autonomous system this route.
Peer-to-peer is claimed mutually between the BGP speaker mutually exchanged messages.When BGP runs on same autonomous system (Autonomous System, AS) inside, be called as (Internal BGP, IBGP).
For ensureing the connectedness between IBGP peer-to-peer, need to set up full annexation between IBGP peer-to-peer.Suppose there is n platform router an AS inside, the IBGP linking number so should set up is just n* (n-1)/2.When IBGP number of peers is a lot, all very large to the consumption of Internet resources and cpu resource.
In bgp protocol, route reflection is utilized to address this problem.In an AS, wherein a router is as Router Reflector RR (Route Reflector), other router as client computer (Client) with set up IBGP between Router Reflector and be connected.Router Reflector transmits between clients (reflection) routing iinformation, and do not need to set up BGP between client computer and connect.
Fig. 1 is the network architecture schematic diagram of the application scenarios of the application.As shown in Figure 1, Router Reflector 100 is connected with the first router 101, the second router 102, third router 103 and the 4th router one 04 respectively.
Wherein, the first router 101, the second router 102, third router 103 and the 4th router one 04 peer-to-peer each other.Peer-to-peer refers to each other, after the routing iinformation of any one router in above-mentioned four routers changes, needs this change to be informed other three routers.Therefore, if do not adopt Router Reflector, but the words directly established a communications link between the first router 101, the second router 102, third router 103 and the 4th router one 04, then need to set up 4* (4-1)/2 totally 6 connections, and after adopting Router Reflector, only need set up 4 connections.
When after employing Router Reflector, if the first router 101, the second router 102, the routing iinformation of any one router in third router 103 and the 4th router one 04 changes, then the routing iinformation after change can be sent to Router Reflector 100, after Router Reflector 100 receives routing iinformation, any process can not be carried out to this routing iinformation, directly this routing iinformation is forwarded to other three routers, thus after the routing iinformation realizing any one router in above-mentioned four routers changes, other three routers can know this change.
But, it should be noted that, be set to the equipment of Router Reflector, will be merely able to forward (namely reflecting) routing iinformation, and any other operation can not be carried out to this routing iinformation.
In the network adopting bgp protocol, set up multicast path and usually can adopt the agreements such as PIM.In the agreements such as PIM, the mode setting up multicast path mainly contains two kinds.
A kind of mode is, the equipment as multicast source sends apply for information to each equipment in downstream.This apply for information is for inquiring whether upstream device adds corresponding multicast group.After upstream device receives this apply for information, then according to self state feedback response message.Can see, which needs as carrying out primary information between the equipment of multicast source and upstream device mutual, and this will take network bandwidth resources.Especially, when upstream device is too much, a large amount of network bandwidth will be taken, even cause network blockage.
Another kind of mode is, select certain router as public Rendezvous Point (Rendezvous Point, RP), need the equipment of receiving multicast message to send to RP to join request, by RP this is joined request again and be transmitted to corresponding recipient, the equipment that this recipient can be multicast source or be connected with multicast source, final multicast source receives this request, and the equipment of receiving multicast message is added multicast list.Can see, in which, need to arrange separately some router as Rendezvous Point, and need perhaps to carry out information interaction between the equipment participant Rendezvous Point of receiving multicast message.Therefore, in which, set up the mode also more complicated of multicast path.
Fig. 2 is the flow chart that the multicast group of the application adds message forwarding method embodiment 1.As shown in Figure 2, the method can comprise:
Step 201: Router Reflector obtains the multicast group that the first access device of being connected with described Router Reflector issues and adds message;
Executive agent in the present embodiment can be the Router Reflector arranged according to bgp protocol.Described first access device can be the router be connected with described Router Reflector.
Described first access device can be connected with terminal or other upstream equipment.When terminal or other upstream equipment need the multicast message receiving certain multicast group, multicast group can be sent to described first access device and add message.Described multicast group adds message and needs to add specific multicast group for the initiator representing described multicast group and add message.Multicast source and receive the equipment of multicast message that this multicast source sends, belongs to same multicast group.
Step 202: described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message;
Described multicast group adds in message and comprises publishing side address.Described publishing side address represents that current multicast group adds message and by which equipment sent.In the present embodiment, have the first access device to be sent to Router Reflector because described multicast group adds message, therefore, the described publishing side address in this step can be the address of described first access device.
In the prior art, described Router Reflector receives after described multicast group adds message, can not add message and carry out any process, but directly described multicast group is added message reflection to other access devices to described multicast group.And in the present embodiment, described multicast group can be revised as the address of described Router Reflector in the publishing side address added in message by described Router Reflector.
Step 203: the address of described first access device is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Described outgoing interface refers to, when the multicast message transmission that multicast source sends is to a certain equipment, described multicast message by which interface is forwarded by this equipment.
Multicast identifier can be adopted in described multicast list to be used as the title of multicast group, record multicast group.The outgoing interface address that described multicast group is corresponding, represents after receiving the multicast message of this multicast group, needs the address be forwarded to by this multicast message.
Using the address of described first access device as after outgoing interface address is saved to multicast list, after described Router Reflector receives and adds multicast message corresponding to message with described multicast group, just described multicast message can be forwarded to described first access device.
Step 204: search route reflection list, determines to need described multicast group to add message reflection the second access device extremely;
Described Router Reflector also stores route reflection list.The address of the access device be connected with described Router Reflector is recorded in described route reflection list.Amended multicast group can be added message and be sent to equipment in described route reflection list except described first access device by described Router Reflector.Except the equipment except described first access device, the second access device can be called.
Step 205: amended described multicast group is added message and is forwarded to described second access device.
Described second access device can be router, also can be other Router Reflector.Described second access device receives after described amended described multicast group adds message, can identify that described multicast group adds the virtual private network mark and destination address comprised in message; Judge whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described second access device, and described destination address is positioned at the downstream of described second access device; If so, then described multicast group is added message and be forwarded to the upstream device be connected with described second access device according to the mode that head end copies.
The described message that described multicast group added is forwarded to the upstream device be connected with described second access device according to the mode that head end copies, specifically can comprise the following steps: described multicast group is added the address that described second access device is revised as in the publishing side address comprised in message; The address of described Router Reflector is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list; Amended described multicast group is added message and is forwarded to described upstream device.
It should be noted that, the multicast group that described second access device receives adds in message, and publishing side address is the address of described Router Reflector.Described second access device using the address of described Router Reflector as after outgoing interface address is saved to multicast list, after described second access device receives and adds the corresponding multicast message of message with described multicast group, according to the outgoing interface address of recording in described multicast list, described multicast message can be forwarded to described Router Reflector.
In sum, each equipment in network adds message to described multicast group successively and forwards, and finally described multicast group can be added message and be forwarded to multicast source.Described multicast source receives after described multicast group adds message, can add described multicast group by needing the address of the equipment adding described multicast group.And, owing to adding in the process of message in the described multicast group of forwarding, each equipment all have recorded the address that described multicast group adds the transmitting terminal of message, so after each equipment receives and adds multicast message corresponding to message with described multicast group, the equipment needing this multicast message to be forwarded to can be known.Each equipment forwards described multicast message successively, finally just described multicast message can be sent to the initial terminal initiated multicast group and add message.That is, adopt the method in the present embodiment, add in the process of message in forwarding multicasting group, also establish multicast path.
Therefore, in the present embodiment, by improving the message processing flow of the Router Reflector adopted in the network of bgp protocol, Router Reflector is set after the multicast group getting the first access device transmission adds message, described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message; The address of described first access device is saved to multicast list as outgoing interface address; Again amended described multicast group is added message and be forwarded to the second access device recorded in route reflection list; Based on bgp protocol, the foundation of multicast path can be realized, and independent multicast routing protocol need not be run in addition, thus the complexity setting up multicast path can be reduced, reduce the consumption for hardware resource.
Fig. 3 is the flow chart that the multicast group of the application adds message forwarding method embodiment 2.As shown in Figure 3, the method can comprise:
Step 301: Router Reflector obtains the multicast group that the first access device of being connected with described Router Reflector sends and adds message;
Step 302: described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message;
Step 303: the address of described first access device is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Step 304: search route reflection list, determines to need described multicast group to add message reflection the second access device extremely;
Step 305: determine not receive the 3rd access device that described amended described multicast group adds message from described second access device;
Step 306: send described amended described multicast group to described 3rd access device and add message.
With the embodiment in Fig. 2 unlike, in the present embodiment, also comprise the 3rd this step of access device determined not receive described amended described multicast group and add message from described second access device.Wherein, described 3rd access device is the part in described second access device, and described 3rd access device is contained in described second access device in other words.Described 3rd access device is do not receive the equipment that described amended described multicast group adds message in described second access device.When described Router Reflector can add message sending to each access device multicast group, recording in route reflection list and certain multicast group is added message being sent to certain access device.When described Router Reflector receives after identical multicast group adds message again, just can determine from route reflection list that certain multicast group being added message has been sent to certain access device, and determine not receive the 3rd access device that described amended described multicast group adds message, thus only send described amended described multicast group to described 3rd access device and add message, and can no longer forward to the access device once receiving this multicast group and add message.
Therefore, in the present embodiment, by determining not receive the 3rd access device that described amended described multicast group adds message from described second access device; Send described amended described multicast group to described 3rd access device and add message; Router Reflector can be avoided repeatedly to forward identical multicast group to the access device once receiving this multicast group and add message and to add message.
Present invention also provides a kind of multicast group and add message receival method.
Fig. 4 is the flow chart that the multicast group of the application adds message receival method embodiment.Executive agent in the present embodiment is the second access device.As shown in Figure 4, the method can comprise:
Step 401: the multicast group that the second access device obtains Router Reflector transmission adds message;
Step 402: identify that described multicast group adds virtual private network (Virtual PrivateNetwork, the VPN) mark and destination address comprised in message;
Described multicast group adds in message and also includes virtual private network mark and destination address.When the virtual private network belonging to described second access device and described virtual private network identify the virtual private network represented identical time, described second access device just can add message to described multicast group and process.
Described destination address can be the address that described multicast group adds multicast source corresponding to message.
Step 403: judge whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described second access device, and described destination address is positioned at the downstream of described second access device; If when judged result is, perform step 404;
Described second access device according to the routing iinformation in routing information base, can judge whether described destination address is positioned at the downstream of described second access device.
Step 404: described multicast group is added message and be forwarded to the upstream device be connected with described second access device according to the mode that head end copies.
Described head end copies, and is a kind of mode of transport multicast route.Concrete, the described message that described multicast group added is forwarded to the upstream device be connected with described second access device according to the mode that head end copies, specifically can comprise the following steps:
Described multicast group is added the address that described second access device is revised as in the publishing side address comprised in message; The address of described Router Reflector is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list; Amended described multicast group is added message and is forwarded to described upstream device.
Present invention also provides a kind of multicast group and add message method.
Fig. 5 is the flow chart that the multicast group of the application adds message method embodiment.Executive agent in the present embodiment is the first access device.As shown in Figure 5, the method can comprise:
Step 501: the multicast group that the first access device obtains upstream equipment transmission adds message;
Step 502: identify that described multicast group adds the virtual private network mark and destination address comprised in message;
Described multicast group adds in message and also includes virtual private network mark and destination address.When the virtual private network belonging to described first access device and described virtual private network identify the virtual private network represented identical time, described first access device just can add message to described multicast group and process.
Described destination address can be the address that described multicast group adds multicast source corresponding to message.
Step 503: judge whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described first access device, and described destination address is positioned at the downstream of described first access device; When judged result is for being, perform step 504.
Described first access device according to the routing iinformation in routing information base, can judge whether described destination address is positioned at the downstream of described first access device.
Step 504: described multicast group is added message and be forwarded to the Router Reflector be connected with described first access device according to the mode that head end copies.
The described message that described multicast group added is forwarded to the Router Reflector be connected with described first access device according to the mode that head end copies, specifically can comprise the following steps:
Described multicast group is added the address that described first access device is revised as in the publishing side address comprised in message; The address of described upstream equipment is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list; Amended described multicast group is added message and is forwarded to described Router Reflector.
Present invention also provides a kind of method for building up of multicast path.
Fig. 6 is the signaling diagram of the method for building up embodiment of the multicast path of the application.As shown in Figure 6, the method can comprise:
Step 601: the first access device sends multicast group to the Router Reflector be connected with described first access device and adds message;
Step 602: described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message by described Router Reflector;
Step 603: the address of described first access device is saved to multicast list as outgoing interface address by described Router Reflector; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Step 604: described Router Reflector searches route reflection list, determines to need described multicast group to add message reflection the second access device extremely;
Step 605: amended described multicast group is added message and is forwarded to described second access device by described Router Reflector;
Step 606: amended multicast group described in described second access device identification adds the virtual private network mark and destination address that comprise in message;
Step 607: described second access device judges whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described second access device, and described destination address is positioned at the downstream of described second access device;
Step 608: if then described amended multicast group is added message and be forwarded to the upstream device be connected with described second access device according to the mode that head end copies.
In the present embodiment, by improving the message processing flow of the Router Reflector adopted in the network of bgp protocol, Router Reflector is set after the multicast group getting the first access device transmission adds message, described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message; The address of described first access device is saved to multicast list as outgoing interface address; Again amended described multicast group is added message and be forwarded to the second access device recorded in route reflection list; Can based on bgp protocol, at the first access device, Router Reflector, and second between access device, realize the foundation of multicast path, and independent multicast routing protocol need not be run in addition, thus the complexity setting up multicast path can be reduced, reduce the consumption for hardware resource.
Present invention also provides a kind of multicast group and add message transmission device.This device can be Router Reflector.
Fig. 7 is the structure chart that the multicast group of the application adds message transmission device embodiment.As shown in Figure 7, this device can comprise:
Acquiring unit 701, the multicast group sent for obtaining the first access device of being connected with described Router Reflector adds message;
Processing unit 702, for adding the address that described Router Reflector is revised as in the publishing side address comprised in message by described multicast group;
The address of described first access device is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Search route reflection list, determine to need described multicast group to add message reflection the second access device extremely;
Transmitting element 703, is forwarded to described second access device for amended described multicast group is added message.
In the present embodiment, by improving the message processing flow of the Router Reflector adopted in the network of bgp protocol, Router Reflector is set after the multicast group getting the first access device transmission adds message, described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message; The address of described first access device is saved to multicast list as outgoing interface address; Again amended described multicast group is added message and be forwarded to the second access device recorded in route reflection list; Based on bgp protocol, the foundation of multicast path can be realized, and independent multicast routing protocol need not be run in addition, thus the complexity setting up multicast path can be reduced, reduce the consumption for hardware resource.
In practical application, described processing unit 702 can also be used for:
Amended described multicast group is being added before message is forwarded to described second access device, from described second access device, determining not receive the 3rd access device that described amended described multicast group adds message;
Described transmitting element 703, can also be used for sending described amended described multicast group to described 3rd access device and add message.
Present invention also provides a kind of multicast group and add message receiving apparatus.This device can be router.
Fig. 8 is the structure chart that the multicast group of the application adds message receiving apparatus embodiment.As shown in Figure 8, this device can comprise:
Acquiring unit 801, the multicast group sent for obtaining Router Reflector adds message;
Processing unit 802, for identifying that described multicast group adds the virtual private network mark and destination address comprised in message;
Judge whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described second access device, and described destination address is positioned at the downstream of described second access device, obtains judged result;
Transmitting element 803, during for representing when described judged result certainly, adding message and being forwarded to the upstream device be connected with described second access device according to the mode that head end copies by described multicast group.
In practical application, described transmitting element 803, specifically may be used for:
Described multicast group is added the address that described second access device is revised as in the publishing side address comprised in message;
The address of described Router Reflector is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Amended described multicast group is added message and is forwarded to described upstream device.
Present invention also provides a kind of multicast group and add message dispensing device.This device can be router.
Fig. 9 is the structure chart that the multicast group of the application adds message dispensing device embodiment.As shown in Figure 9, this device can comprise:
Acquiring unit 901, the multicast group sent for obtaining upstream equipment adds message;
Processing unit 902, for identifying that described multicast group adds the virtual private network mark and destination address comprised in message;
Judge whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described first access device, and described destination address is positioned at the downstream of described first access device, obtains judged result;
Transmitting element 903, during for representing when described judged result certainly, then adds message and is forwarded to the Router Reflector be connected with described first access device according to the mode that head end copies by described multicast group.
In practical application, described transmitting element 903, specifically may be used for:
Described multicast group is added the address that described first access device is revised as in the publishing side address comprised in message;
The address of described upstream equipment is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Amended described multicast group is added message and is forwarded to described Router Reflector.
What present invention also provides a kind of multicast path sets up system.This system can comprise:
First access device, the second access device and Router Reflector;
Described first access device sends multicast group to the described Router Reflector be connected with described first access device and adds message;
Described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message by described Router Reflector;
The address of described first access device is saved to multicast list as outgoing interface address by described Router Reflector; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Described Router Reflector searches route reflection list, and determining needs described multicast group to add message reflection described second access device extremely;
Amended described multicast group is added message and is forwarded to described second access device by described Router Reflector;
Amended multicast group described in described second access device identification adds the virtual private network mark and destination address that comprise in message;
Described second access device judges whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described second access device, and described destination address is positioned at the downstream of described second access device;
If so, then described amended multicast group is added message and be forwarded to the upstream device be connected with described second access device according to the mode that head end copies.
Wherein, the first access device and the second access device can be all routers.
In native system, by improving the message processing flow of the Router Reflector adopted in the network of bgp protocol, Router Reflector is set after the multicast group getting the first access device transmission adds message, described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message; The address of described first access device is saved to multicast list as outgoing interface address; Again amended described multicast group is added message and be forwarded to the second access device recorded in route reflection list; Based on bgp protocol, the foundation of multicast path can be realized, and independent multicast routing protocol need not be run in addition, thus the complexity setting up multicast path can be reduced, reduce the consumption for hardware resource.
In addition, the embodiment of the present application additionally provides a kind of computing node, computing node may be the host server comprising computing capability, or personal computer PC, or portable portable computer or terminal etc., the application's specific embodiment does not limit the specific implementation of computing node.
Figure 10 is the structure chart of the computing node of the application.As shown in Figure 10, computing node 700 comprises:
Processor (processor) 710, communication interface (Communications Interface) 720, memory (memory) 730, bus 740.
Processor 710, communication interface 720, memory 730 completes mutual communication by bus 740.
Processor 710, for executive program 732.
Particularly, program 732 can comprise program code, and described program code comprises computer-managed instruction.
Processor 710 may be a central processor CPU, or specific integrated circuit ASIC (Application Specific Integrated Circuit), or is configured to the one or more integrated circuits implementing the embodiment of the present application.
Memory 730, for depositing program 732.Memory 730 may comprise high-speed RAM memory, still may comprise nonvolatile memory (non-volatile memory), such as at least one magnetic disc store.
In program 732, the specific implementation of each module is see the corresponding module in Fig. 7-embodiment illustrated in fig. 9 or unit, is not repeated herein.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the application can add required hardware platform by software and realize, can certainly all be implemented by hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, what the technical scheme of the application contributed to background technology can embody with the form of software product in whole or in part, this computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform the method described in some part of each embodiment of the application or embodiment.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
Apply specific case herein to set forth the principle of the application and execution mode, the explanation of above embodiment is just for helping method and the core concept thereof of understanding the application; Meanwhile, for one of ordinary skill in the art, according to the thought of the application, all will change in specific embodiments and applications.In sum, this description should not be construed as the restriction to the application.

Claims (14)

1. multicast group adds a message forwarding method, it is characterized in that, comprising:
Router Reflector obtains the multicast group that the first access device of being connected with described Router Reflector sends and adds message;
Described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message;
The address of described first access device is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Search route reflection list, determine to need described multicast group to add message reflection the second access device extremely;
Amended described multicast group is added message and is forwarded to described second access device.
2. method according to claim 1, is characterized in that, describedly amended described multicast group is added before message is forwarded to described second access device, also comprises:
From described second access device, determine not receive the 3rd access device that described amended described multicast group adds message;
Send described amended described multicast group to described 3rd access device and add message.
3. multicast group adds a message receival method, it is characterized in that, comprising:
The multicast group that second access device obtains Router Reflector transmission adds message;
Identify that described multicast group adds the virtual private network mark and destination address comprised in message;
Judge whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described second access device, and described destination address is positioned at the downstream of described second access device;
If so, then described multicast group is added message and be forwarded to the upstream device be connected with described second access device according to the mode that head end copies.
4. method according to claim 3, is characterized in that, the described message that described multicast group added is forwarded to the upstream device be connected with described second access device according to the mode that head end copies, specifically comprise:
Described multicast group is added the address that described second access device is revised as in the publishing side address comprised in message;
The address of described Router Reflector is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Amended described multicast group is added message and is forwarded to described upstream device.
5. multicast group adds a message method, it is characterized in that, comprising:
The multicast group that first access device obtains upstream equipment transmission adds message;
Identify that described multicast group adds the virtual private network mark and destination address comprised in message;
Judge whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described first access device, and described destination address is positioned at the downstream of described first access device;
If so, then described multicast group is added message and be forwarded to the Router Reflector be connected with described first access device according to the mode that head end copies.
6. method according to claim 5, is characterized in that, the described message that described multicast group added is forwarded to the Router Reflector be connected with described first access device according to the mode that head end copies, specifically comprise:
Described multicast group is added the address that described first access device is revised as in the publishing side address comprised in message;
The address of described upstream equipment is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Amended described multicast group is added message and is forwarded to described Router Reflector.
7. a method for building up for multicast path, is characterized in that, comprising:
First access device sends multicast group to the Router Reflector be connected with described first access device and adds message;
Described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message by described Router Reflector;
The address of described first access device is saved to multicast list as outgoing interface address by described Router Reflector; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Described Router Reflector searches route reflection list, and determining needs described multicast group to add message reflection the second access device extremely;
Amended described multicast group is added message and is forwarded to described second access device by described Router Reflector;
Amended multicast group described in described second access device identification adds the virtual private network mark and destination address that comprise in message;
Described second access device judges whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described second access device, and described destination address is positioned at the downstream of described second access device;
If so, then described amended multicast group is added message and be forwarded to the upstream device be connected with described second access device according to the mode that head end copies.
8. multicast group adds a message transmission device, it is characterized in that, comprising:
Acquiring unit, the multicast group sent for obtaining the first access device of being connected with described Router Reflector adds message;
Processing unit, for adding the address that described Router Reflector is revised as in the publishing side address comprised in message by described multicast group;
The address of described first access device is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Search route reflection list, determine to need described multicast group to add message reflection the second access device extremely;
Transmitting element, is forwarded to described second access device for amended described multicast group is added message.
9. device according to claim 8, is characterized in that, described processing unit also for:
Amended described multicast group is being added before message is forwarded to described second access device, from described second access device, determining not receive the 3rd access device that described amended described multicast group adds message;
Described transmitting element, also adds message for sending described amended described multicast group to described 3rd access device.
10. multicast group adds a message receiving apparatus, it is characterized in that, comprising:
Acquiring unit, the multicast group sent for obtaining Router Reflector adds message;
Processing unit, for identifying that described multicast group adds the virtual private network mark and destination address comprised in message;
Judge whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described second access device, and described destination address is positioned at the downstream of described second access device, obtains judged result;
Transmitting element, during for representing when described judged result certainly, adding message and being forwarded to the upstream device be connected with described second access device according to the mode that head end copies by described multicast group.
11. devices according to claim 10, is characterized in that, described transmitting element, specifically for:
Described multicast group is added the address that described second access device is revised as in the publishing side address comprised in message;
The address of described Router Reflector is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Amended described multicast group is added message and is forwarded to described upstream device.
12. 1 kinds of multicast group add message dispensing device, it is characterized in that, comprising:
Acquiring unit, the multicast group sent for obtaining upstream equipment adds message;
Processing unit, for identifying that described multicast group adds the virtual private network mark and destination address comprised in message;
Judge whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described first access device, and described destination address is positioned at the downstream of described first access device, obtains judged result;
Transmitting element, during for representing when described judged result certainly, then adds message and is forwarded to the Router Reflector be connected with described first access device according to the mode that head end copies by described multicast group.
13. devices according to claim 12, is characterized in that, described transmitting element, specifically for:
Described multicast group is added the address that described first access device is revised as in the publishing side address comprised in message;
The address of described upstream equipment is saved to multicast list as outgoing interface address; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Amended described multicast group is added message and is forwarded to described Router Reflector.
14. 1 kinds of multicast paths set up system, it is characterized in that, comprising:
First access device, the second access device and Router Reflector;
Described first access device sends multicast group to the described Router Reflector be connected with described first access device and adds message;
Described multicast group is added the address that described Router Reflector is revised as in the publishing side address comprised in message by described Router Reflector;
The address of described first access device is saved to multicast list as outgoing interface address by described Router Reflector; Multicast group and the outgoing interface address corresponding with described multicast group is recorded in described multicast list;
Described Router Reflector searches route reflection list, and determining needs described multicast group to add message reflection described second access device extremely;
Amended described multicast group is added message and is forwarded to described second access device by described Router Reflector;
Amended multicast group described in described second access device identification adds the virtual private network mark and destination address that comprise in message;
Described second access device judges whether that the virtual private network that described virtual private network mark represents is identical with the virtual private network belonging to described second access device, and described destination address is positioned at the downstream of described second access device;
If so, then described amended multicast group is added message and be forwarded to the upstream device be connected with described second access device according to the mode that head end copies.
CN201410842999.4A 2014-12-30 2014-12-30 Method and device for constructing message forwarding, sending, receiving and multicasting paths Pending CN104601478A (en)

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Application publication date: 20150506