CN106357541A - Information transmission method and device - Google Patents

Information transmission method and device Download PDF

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Publication number
CN106357541A
CN106357541A CN201610813210.1A CN201610813210A CN106357541A CN 106357541 A CN106357541 A CN 106357541A CN 201610813210 A CN201610813210 A CN 201610813210A CN 106357541 A CN106357541 A CN 106357541A
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Prior art keywords
convergent point
information
multicast group
update information
protocol update
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CN201610813210.1A
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CN106357541B (en
Inventor
黄李伟
吴慧英
王伟
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New H3C Information Technologies Co Ltd
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Hangzhou H3C Technologies Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/16Multipoint routing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks
    • H04L12/4633Interconnection of networks using encapsulation techniques, e.g. tunneling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/50Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/74Address processing for routing

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The embodiment of the invention provides an information transmission method and an information transmission device. The method comprises steps of confirming a gathering point corresponding to a multicast group; generating protocol updating information according to the address of the gathering point; sending the protocol updating information to every backbone network edge router PE, so that every PE in the multicast group can generate the convergent point information table according to the update information of the protocol, wherein the convergent point information table is used for building a backbone core equipment tunnel in the multicast group. Through the embodiment of the invention, address of the convergent point is synchronized to all PE in the MVPN (mobile virtual private network) by using the MVPN BGP (border gateway protocol) protocol message, thus the dependence problem of BSR (bottom simulation reflector) information transmission on Inclusive P-Tunnel in the existing MVPN can be solved.

Description

A kind of information transmitting methods and device
Technical field
The present invention relates to technical field of the computer network, more particularly to a kind of information transmitting methods and a kind of information transmission Device.
Background technology
VPN (virtual private network) (virtual private network, vpn) refers to set up private network in common network The technology of network.One vpn network is made up of the public network network of operator and each website (site) of user, between each site Isolate each other, only just enable intercommunication by public network.Wherein, multicast vpn (multicast virtual Private network, mvpn) it is a technology realizing multicast transmission in vpn network.
At present, it will usually set up two kinds of point-to-multipoint main website (point in the networking of mvpn Multiple point, p2mp) tunnel, be respectively: the backbone network nucleus equipment tunnel (inclusive of the dynamic compatibility Provider tunnel, inclusive p-tunnel) and dynamic selective backbone network nucleus equipment tunnel (selective Provider tunnel, selective p-tunnel).Wherein, the first dynamic inclusive p-tunnel is to be mainly After mvpn Border Gateway Protocol (border gateway protocol, bgp) session establishment gets up, enable mvpn ability The tunnel that will set up, the Main Function in this tunnel is transmission buffer status reporting (buffer status report, bsr) Information and the forwarding of any multicast source data;The main effect of second dynamic selective p-tunnel is special when having When the registration that multicast source joins message, will not be to the backbone edges router not requiring this multicast source flux (provider edge router, pe) node forwarding multicasting message.
Specifically, after setting up mvpn bgp neighborhood between pe, dynamic inclusive p- accordingly can be set up tunnel.For example, pe1, pe2 and pe3 set up mvpn bgp neighbours two-by-two, and set up dynamic inclusive p- two-by-two Tunnel, as shown in figure 1, tunnel1 and tunnel2 is inclusive p-tunnel.Wherein, tunnel1 is most important One effect is exactly to notify pe1 equipment, and the most important effect of tunnel2 is exactly to notify pe2 equipment, convergent point On the customer network edge router (customer edge router, ce) that (rendezvous point, rp) hangs under pe3 Face.After pe1 receives the bsr information that tunnel1 sends over, (source s) issues the multicast of pe1 equipment to multicast source Flow all can be forwarded to pe3 equipment;Receiver (receiver, r) if it is desired to receive multicast source s multicast packet, obtain to Rp sends multicast and adds request message.After forming multicast forward table on pe3, multicast packet can be forwarded to pe2.
But, do not have to inclusive p-tunnel tunnel protection mechanism in current mvpn networking.If inclusive P-tunnel breaks down (down), then bsr information then cannot be carried out being sent to the pe setting up mvpn bgp neighbours, leads to follow-up Multicast service all cannot normally use.
Content of the invention
In view of the above problems it is proposed that the embodiment of the present invention is to provide one kind to overcome the problems referred to above or at least in part A kind of information transmitting methods of solving the above problems and accordingly a kind of information transfer device, to solve bsr in existing mvpn The Dependence Problem to inclusive p-tunnel for the information transmission, thus ensure the normal use of multicast service.
In order to solve the above problems, the embodiment of the invention discloses a kind of information transmitting methods, comprising:
Determine the corresponding convergent point of multicast group;
Address according to described convergent point generates protocol update information;
Described protocol update information is sent to each backbone edges router pe, so that each pe in described multicast group is equal Generate convergent point information table according to described protocol update information, wherein, described convergent point information table is used for creating described multicast group In backbone network nucleus equipment tunnel.
Accordingly, the embodiment of the invention also discloses another kind of information transmitting methods, comprising:
When receiving protocol update information, described protocol update information is parsed, obtains the address of convergent point;
Address using described convergent point generates convergent point information table, and wherein, described convergent point information table is used for creating institute State the backbone network nucleus equipment tunnel in the corresponding multicast group of convergent point.
The embodiment of the invention also discloses a kind of information transfer device, comprising:
Convergent point determining module, for determining the corresponding convergent point of multicast group;
Information generating module, generates protocol update information for the address according to described convergent point;
Information sending module, for described protocol update information is sent to each backbone edges router pe, so that institute The each pe stating in multicast group all generates convergent point information table, wherein, described convergent point information table according to described protocol update information For creating the backbone network nucleus equipment tunnel in described multicast group.
The embodiment of the invention also discloses another kind of information transfer device, comprising:
Information analysis module, for when receiving protocol update information, parsing to described protocol update information, obtaining Address to convergent point;
Information table generation module, generates convergent point information table, wherein, described convergence for the address using described convergent point Point information table is used for creating the backbone network nucleus equipment tunnel in the corresponding multicast group of described convergent point.
The embodiment of the present invention includes advantages below:
First, the embodiment of the present invention can generate protocol update information according to the address of convergent point, such as passes through convergent point Address be added in boundary gateway protocol message generation protocol update information, and this protocol update information can be sent to Each pe in network so that each pe in this multicast group can generate convergent point information table according to protocol update information, that is, passes through Mvpn bgp protocol massages by the address synchronization of the convergent point entrained by bsr information to all pe in mvpn, thus solving The Dependence Problem to inclusive p-tunnel for the bsr information transmission in existing mvpn.
Secondly, the protocol update information that the pe of the embodiment of the present invention can be received by parsing, obtains the ground of convergent point Location, and the address breath of convergent point can be adopted to generate corresponding convergent point information table, this convergent point information table can be used for creating Build the backbone network nucleus equipment tunnel of transmission services data, that is, this dry net nucleus equipment tunnel can be used to multicast data forwarding, Thus ensureing the normal use of multicast service.
Brief description
Fig. 1 be existing mvpn networking in set up the schematic diagram of inclusive p-tunnel;
Fig. 2 is a kind of schematic diagram of multicast vpn;
Fig. 3 is the schematic diagram in the p2mp tunnel that existing mvpn sets up;
Fig. 4 is a kind of flow chart of steps of information transmitting methods embodiment of the present invention;
Fig. 5 is the flow chart of steps of another kind of information transmitting methods embodiment of the present invention;
Fig. 6 is the flow chart of steps of the information transmitting methods in one specific example of the present invention;
Fig. 7 a is the transmission schematic diagram of protocol update information in specific example of the present invention;
Fig. 7 b is the schematic diagram in one specific example of the present invention to newly-increased pe synchronization rp information.
Fig. 8 a is a kind of structured flowchart of information transfer device embodiment of the present invention;
Fig. 8 b is a kind of structured flowchart of information transfer device alternative embodiment of the present invention;
Fig. 9 a is the structured flowchart of another kind of information transfer device embodiment of the present invention;
Fig. 9 b is the structured flowchart of another kind of information transfer device alternative embodiment of the present invention.
Specific embodiment
Understandable for enabling the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings and specifically real The present invention is further detailed explanation to apply mode.
Fig. 2 shows a kind of schematic diagram of multicast vpn.Multicast source and user (i.e. recipient) are in vpn.Private network side is adopted With Protocol Independent Multicast (protocol independent multicast, pim) agreement.Public network is multiprotocol label switching (multi-protocol label switching, mpls) backbone network, using RSVP-traffic engineering (resource reservation protocol-traffic engineering, rsvp-te) builds the p2mp mark between pe Sign and forward.Flux of multicast encapsulates mpls label on the pe connecting with ce, by RSVP (resource Reservation protocol, rsvp) p2mp tunnel is forwarded to other pe having receiver, and have and remove on the pe of receiver Mpls encapsulates, and walks the ce that common three layers of multicast issue lower extension.
At present, mvpn carries out the automatic discovery of pe by bgp, builds between the pe router in same mbgp-mvpn A vertical bgp peer-to-peer, is exchanged with each other mbgp- by MP-BGP (multiprotocol bgp, mbgp) Mvpn control information.Bgp passes through a new address family, such as multicast vpn (multicast virtual private Network, mcast-vpn) address family, to realize the automatic discovery of pe.Any pe being connected to a mbgp-mvpn is necessary One route is issued by bgp, this route contains route target (route target, rt) extended community attribute, receives this The opposite end pe of route pass through this rt attribute judge sender whether with oneself be same mbgp-mvpn, then notify rsvp- Te goes to set up p2mp tunnel.
In the networking of mvpn, if business datum and protocol massages are transmitted using same tunnel, easily occur by In business datum than problem that is larger and leading to protocol massages to be washed out by business datum.Therefore, for avoiding the data of protocol massages The problem of packet loss, would generally set up two kinds of p2mp tunnel in the networking of mvpn, be respectively: dynamic inclusive P-tunnel and dynamic selective p-tunnel, using inclusive p-tunnel transmission protocol message, to adopt Selective p-tunnel transmission services data.Any one have multicast message demand (if desired for send control message or Flow) pe all can initiate the dynamic p-tunnel of compatibility tree first and create, this p-tunnel will connect all recipients' pe.The pe of promoter can be issued by mbgp and carry offer multicast services interface (provider multicast service Interface, pmsi) tunnel attribute (tunnel attribute) Network Layer Reachable Information (network layer Reachable information, nlri) type (type) be 1 autonomous system domains between (intra-autonomous System, intra-as) dynamic compatibility pmsi interface (inclusive-pmsi, i-pmsi) discovery route (auto- automatically Discovery route, a-d route) arrive each pe.Wherein, carry p-tunnel's to be created in pmsi tunnel attribute Type.Different with inclusive p-tunnel visioning procedure, when the establishment of selective p-tunnel and do not know Which pe of road concentrates in this recipient.Head node pe issues the choosing of the nlri type=3 carrying pmsi tunnel attribute using mbgp Selecting property pmsi interface (selective-pmsi, s-pmsi) a-d route, needs the pe receiving this flow to respond nlri type =4 leaf (leaf) a-d route.I.e. label switched path (label switched path, lsp) head node needs to know Which pe needs to receive the data of specific c-flow.
Fig. 3 shows the schematic diagram in the p2mp tunnel that existing mvpn sets up.As shown in figure 3, pe1 can issue carries pmsi The intra-as i-pmsi a-d route of the nlri type=1 of tunnel attribute is to pe2 and pe3;Pe2 and pe3 should in reception During a-d route, this multicast group pair can be created according to the type carrying p-tunnel to be created in pmsi tunnel attribute The inclusive p-tunnel answering, such as creates the inclusive p-tunnel belonging to vpn a.In addition, pe1 can also issue The s-pmsi a-d route of nlri type=3 carrying pmsi tunnel attribute is to pe2 and pe3;Pe2 and pe3 is receiving this During s-pmsi a-d route, respond the leaf a-d route of nlri type=4 so that pe1 knows pe2 and pe3 to pe1 Need to receive the multicast message of vpn a.Wherein, the leaf a-d route that pe2 is responded carry mpls label 1151 so that Business datum can be sent to pe2 according to mpls label 1151 by pe1;The leaf a-d route that pe3 is responded carries Mpls label 1150 is so that business datum can be sent to pe3 according to mpls label 1150 by pe1.
Obviously, in existing mvpn the transitive dependency of bsr information in inclusive p-tunnel.If inclusive is p- Tunnel down falls, then bsr information then cannot be carried out being sent to the pe setting up mvpn bgp neighbours, and follow-up multicast service is all Cannot normally use.
One of core idea in the embodiment of the present invention is, while mvpn bgp neighbours set up, by mvpn Bgp protocol massages by the address synchronization of the convergent point in bsr information to all opposite end pe in mvpn so that the biography of bsr information Pass and be no longer dependent on inclusive p-tunnel, that is, solve in existing mvpn bsr information transmission to inclusive p- The Dependence Problem of tunnel, thus ensure the normal use of multicast service.
With reference to Fig. 4, show a kind of flow chart of steps of information transmitting methods embodiment of the present invention, specifically can include Following steps:
Step 402, determines the corresponding convergent point of multicast group.
Generally, mvpn can carry out the automatic discovery of pe by bgp agreement, and the mvpn bgp neighbours setting up between pe are closed System, to form a multicast group.In the networking of mvpn, can be assembled for multicast based on the mvpn bgp neighborhood between pe Put corresponding convergent point (rendezvous point, rp), so that all sender and recipient in this multicast group are Can be converged in this convergent point.The ce being configured to rp can be referred to as rp equipment by the embodiment of the present invention, and can be by even The pe connecing this rp equipment is referred to as specific pe.Rp equipment can be defined as the corresponding convergence of multicast group belonging to it by this specific pe Point.
Step 404, the address according to described convergent point generates protocol update information.
The address of this convergent point, after the convergent point determining multicast group, can be added to borde gateway by the embodiment of the present invention In agreement (border gateway protocol, bgp) message, generate this multicast group corresponding protocol update information.This agreement (update) information of renewal may include that the nlri carrying rp information, such as bsr information.
As a specific example of the present invention, when pe1, pe2 and pe3 set up mvpn bgp neighbours between any two, can To be configured to, by hanging ce under pe3, the corresponding rp of multicast group that pe1, pe2 and pe3 are formed, ce will be hung under pe3 and set as rp Standby, such that it is able to by procotol (internet protocol, the ip) address of this ce as rp node address, Yi Jike To be added to the node address of this rp in bgp message, generate bgp update information.Wherein, bgp update information carries Nlri specifically can include route-type (route type), Route Distinguisher (route distinguisher, rd), group Broadcast self-control system (source autonomous system, source as) number, rp address (address), the multicast group in source Parameter informations such as (multicast group).Wherein, the value of route-type is determined for whether nlri carries rp synchronously letter Breath;Rd can be used for distinguishing the single client that obvious vpn route is connected to provider;Rp address can be used to indicate that bsr The rp address carrying in information;Multicast group can be used to indicate that the network segment of the corresponding multicast group of this rp, such as can be used for Represent the scope of the multicast group that this rp can service.
Step 406, described protocol update information is sent to each pe, so that each pe in described multicast group is all according to described Protocol update information generates convergent point information table.
, after the neighborhood between pe is successfully established, the specific pe connecting rp equipment can be based on for the embodiment of the present invention The neighborhood being set up, by protocol update information transfer to each pe in mvpn networking by way of bgp notices, so that Obtain each pe in the corresponding multicast group of this rp and can generate convergent point information table according to protocol update information.
Pe in the embodiment of the present invention can parse to receiving protocol update information, obtains in this protocol update information Convergent point address, such that it is able to this multicast group corresponding convergent point information table is generated based on the address of convergent point.Specifically, Pe, after receiving protocol update information, can extract corresponding with this convergent point group of the address of convergent point from protocol update information Broadcast the network segment of group, such that it is able to by verifying local ip address whether in this network segment, to determine the need for generating this group Broadcast the corresponding convergent point information table of group.If in the network segment of multicast group, pe can determine this protocol update for local ip address Information meets locally configured introducing condition, and then generates this multicast group pair using entrained parameter information in protocol update information The convergent point information table answered.If local ip address is not in the network segment of multicast group, pe can determine this protocol update information Do not meet locally configured introducing condition, and then ignore this protocol update information, if do not processed to this protocol update information.Its In, the data recorded in this convergent point information table may include that vpn routing forwarding (vpn routing and Forwarding, vrf), the parameter information such as the address of convergent point and next-hop (nexthop), and can be used for creating multicast group In backbone network nucleus equipment tunnel.This backbone network nucleus equipment tunnel can be used for transmission services data.
For example, in conjunction with above-mentioned example, after the mvpn bgp neighborhood of pe3 and pe1, pe2 is successfully established, pe3 is permissible By way of bgp notices, protocol update information is sent to pe1 and pe2, so that pe1 and pe2 can be based on this agreement The node address of the rp entrained by fresh information is locally generated corresponding rp information table.Pe1 and pe2 can be according to this rp information Table recorded data creates the backbone network nucleus equipment tunnel and pe3 between, with using the backbone network nucleus equipment being created Tunneling traffic data.
Obviously, the embodiment of the present invention can generate protocol update information according to the address of convergent point, such as passes through convergent point Address be added in boundary gateway protocol message generation protocol update information, and can be by sending out to each pe in multicast group Give this protocol update information so that each pe in multicast group corresponding to this convergent point can generate according to protocol update information and converge Accumulation information table, that is, pass through mvpn bgp protocol massages by the address synchronization of the convergent point entrained by bsr information in mvpn All pe, thus solve the Dependence Problem to inclusive p-tunnel for the bsr information transmission in existing mvpn.
Certainly, the embodiment of the present invention can also determine and belong to convergence according to the neighborhood between each pe pre-building Each pe in the corresponding multicast group of point, so can to determined by each pe send this multicast group corresponding protocol update letter Breath, that is, can avoid sending the situation of this protocol update information to the pe being not belonging to the corresponding multicast group of this convergent point, save Internet resources.
With reference to Fig. 5, show the flow chart of steps of another kind of information transmitting methods embodiment of the present invention, specifically can wrap Include following steps:
Step 502, when receiving protocol update information, parses to protocol update information, obtains the ground of convergent point Location.
In the embodiment of the present invention, pe, can be according to this agreement when receiving the protocol update information that specific pe is sent Fresh information is in the introducing locally being route.Specifically, pe can parse to the protocol update information receiving, and obtains In this protocol update information, entrained information, such as comprises the nlri of rp information;And, can be determined using obtained information Whether protocol update information meets locally configured introducing condition.Wherein, nlri specifically can include route-type, Route Distinguisher The parameter informations such as symbol, the self-control system number of multicast source, rp address, multicast group, the present invention point embodiment does not specifically limit to this System.
If meeting locally configured introducing condition, can be with execution step 504, to introduce this protocol update information institute local The route carrying, such as introduces the 8th class route comprising rp address using the address of the convergent point parsing.
Step 504, the address using described convergent point generates convergent point information table.
In the embodiment of the present invention, pe, can be by adopting after determining that protocol update information meets locally configured introducing condition With the address of entrained convergent point in protocol update information, it is locally generated this multicast group corresponding convergent point information table.Its In, this convergent point information table can be used for creating the backbone network nucleus equipment tunnel in the corresponding multicast group of described convergent point, specifically Address and bgp far-end neighbour's information of convergent point, the such as facility information of next-hop can be included.
As a specific example of the present invention, in conjunction with above-mentioned example, pe1 and pe2 synchronously believes in the rp receiving pe3 transmission After breath, can introduce locally carrying out bgp route.If the bgp route entrained by rp synchronizing information meets pe1 locally configured Introducing condition, then pe1 can be by parse to this bgp route, with using parsing the adjacent letter of rp information and bgp far-end Breath, in the address list item of one rp of local maintenance, as shown in table 1, that is, generates corresponding rp information table.In the same manner, if rp synchronously believes Breath also complies with pe2 in locally configured introducing condition, then pe2 can also generate rp information table as shown in table 1.Wherein, vrf is Vpn1, can represent the corresponding vpn of vrf that vpn1 is this multicast group;Rp is 4.4.4.4, can be used to indicate that address is 4.4.4.4 rp is the corresponding convergent point of this multicast group;Nexthop be pe3, can be used to indicate that business datum in this multicast In group, next-hop is pe3.
vrf rp nexthop
vpn1 4.4.4.4 pe3
Table 1
After rp information table generates, the backbone network that pe1 with pe2 can be connected with pe3 using the establishment of this rp information table Nucleus equipment tunnel, such as actively goes to set up selective p-tunnel, can be individually identified as tunnel1 and tunnel2.Its In, the backbone network nucleus equipment tunnel that pe1 is connected with pe3 is tunnel1, and the source address of tunnel1 is 1.1.1.1, purpose Address is 3.3.3.3;The backbone network nucleus equipment tunnel that pe2 is connected with pe3 is tunnel2, and the source address of tunnel2 is 2.2.2.2, destination address is 3.3.3.3.
To sum up, the pe of the embodiment of the present invention can pass through analysis protocol fresh information, obtains the address of convergent point, Yi Jike Corresponding convergent point information table is generated with the address using convergent point, you can to receive bsr letter by mvpn bgp protocol massages The address of the entrained convergent point of breath, thus solve in existing mvpn bsr information transmission to inclusive p-tunnel Dependence Problem;And, this convergent point information table can be used for creating the backbone network nucleus equipment tunnel of transmission services data, that is, This dry net nucleus equipment tunnel can be used to multicast data forwarding, thus ensureing the normal use of multicast service.
In a preferred embodiment of the invention, generate protocol update information according to the address of described convergent point specifically may be used To include: obtain the address that described convergent point is configured, generate corresponding Network Layer Reachable Information;By described Internet up to letter Breath is added in boundary gateway protocol message, generates described protocol update information.Wherein, Network Layer Reachable Information can include converging The network segment of the corresponding multicast group of accumulation, that is, protocol update information can carry the network segment of the corresponding multicast group of convergent point.
In the networking of mvpn, one can be formed by setting up the neighborhood between pe in multicasting virtual private network road Multicast group, is such as designated vpn1;And can will determine with the pe that is connected of customer network edge router as convergent point rp Specific pe for this corresponding multicast group in multicasting virtual private network road.Specifically, the specific pe in multicast group can be from lower extension Obtain loopback port address in ce, and using acquired loopback port address as convergent point address, such that it is able to by by this address It is added in the Network Layer Reachable Information entrained by bgp message, to carry out more to the Network Layer Reachable Information entrained by bgp message Newly, generate this multicast group corresponding protocol update information, such as generate bgp update information.Optionally, sending protocol update During information, specific pe can judge to set up the opposite end pe of neighborhood with it according to the network segment entrained by this protocol update information Whether belong to the pe in the corresponding multicast group of this convergent point.If opposite end pe belongs to the pe in the corresponding multicast group of this convergent point, specific Pe can send protocol update information to this opposite end pe, generates corresponding remittance to trigger this opposite end pe according to this protocol update information Accumulation information table, such that it is able to create backbone network nucleus equipment tunnel with opposite end pe, to transmit the business datum in this multicast group. Certainly, if opposite end pe is not belonging to the pe in the corresponding multicast group of this convergent point, specific pe can ignore this opposite end pe, if not to this Opposite end pe sends this protocol update information, such that it is able to save Internet resources.
In a preferred embodiment of the invention, according to described neighborhood, determine and belong to each in described multicast group Pe, specifically may include that based on described neighborhood, and each pe in the network segment belonging to entrained by protocol update information is defined as Each pe in the corresponding multicast group of convergent point.
Specifically, after the neighborhood between pe is successfully established, the specific pe of multicast group can be based on and opposite end pe Between neighborhood, the pe in the specified network segment in Network Layer Reachable Information is defined as convergent point in multicast group Pe, so can determined by pe send view fresh information, receive the pe of this protocol information and generate this multicast group pair to trigger The convergent point information table answered.Pe, when receiving protocol update information, can detect whether this protocol update information meets locally Configuration introducing condition;If meeting, the protocol update information meeting locally configured introducing condition being parsed, obtains convergent point Address and neighbor information, such that it is able to convergent point information table is generated using described address and neighbor information;If not meeting, no Corresponding convergent point information table need to be generated according to this protocol update information, such as can ignore or delete this protocol update information.
Certainly, specific pe other modes can also determine the pe belonging in the corresponding multicast group of this convergent point, and the present invention is implemented Example is not specifically limited to this.For example, whether specific pe can set up neighborhood for this convergent point by checking opposite end pe, Correspond to multicast group to determine whether this opposite end pe belongs to this convergent point.If opposite end pe is directed to this convergent point and sets up neighbours with specific pe Relation, then specific pe can determine this opposite end pe belong to this convergent point correspond to multicast group.If opposite end pe is not for this convergence Point and specific pe set up neighborhood, then specific pe can determine that this opposite end pe is not belonging to this convergent point and corresponds to multicast group.
In a preferred embodiment of the invention, this information transmitting methods also includes: is generating described convergent point information After table, to the specific pe feedback route confirmation of described multicast group, described route confirmation is used for agreement described in response more Fresh information;The backbone network nucleus equipment tunnel being connected with described specific pe is created based on described convergent point information table.Wherein, described Backbone network nucleus equipment tunnel is used for transmitting the business datum in described multicast group;This specific pe is to connect described convergent point Pe3 in pe, such as above-mentioned example.
In the embodiment of the present invention, after opposite end pe generates convergent point information table, route confirmation letter can be fed back to specific pe Breath, has been received by entrained routing iinformation in this protocol update information with this opposite end of response pe.Specific pe is receiving this During the route confirmation that opposite end pe is fed back, no longer can send this routing iinformation to this opposite end pe.Wherein, route confirms Information may include that route-type, Route Distinguisher, the self-control system number of multicast source and confirms the letter such as (confirm) parameter Breath.For example, pe3 is when receiving the route confirmation that pe1 is sent, by entrained parameter in this route confirmation Information it may be determined that this pe1 generates this multicast group vpn1 corresponding convergent point information table according to this protocol update information, thus No longer can send, to pe1, the protocol update information carrying this rp synchronizing information.In addition, pe1 can also adopt convergent point information Data recorded in table actively creates selective p-tunnel, to be passed using the selective p-tunnel being created Multicast packet in this multicast group vpn1 defeated, such as business datum.
On the basis of above-described embodiment, the present embodiment is discussed in detail to the present invention with reference to concrete application scene.
With reference to Fig. 6, show the flow chart of steps of the information transmitting methods in one specific example of the present invention, specifically permissible Comprise the steps:
Step 602, pe1, pe2 and pe3 set up mvpn bgp neighborhood between any two.
Such that it is able to form corresponding multicast group vpn1, and pe3 can be defined as the specific pe of multicast group vpn1.
Step 604, pe3 determines the address of rp.
Specifically, pe3 can be using the ce equipment of lower extension as rp equipment.If the loopback port address of rp equipment is configured to 4.4.4.4, then the loopback port address that pe3 can get that this convergent point configured is 4.4.4.4, and can be by this loopback mouth Address is as the address of rp.
Step 606, pe3 can generate protocol update information according to the address of rp
Pe3, after getting the address of rp, the address of rp can be added in the nlri entrained by bgp, generate bgp Update information.
Step 608, pe3 can be based on neighborhood, and the protocol update being generated information is sent to pe1 and pe2.
After the mvpn bgp neighbours of pe3 and pe1, pe2 are successfully established, pe3 can inspire transmission bgp to pe1 and pe2 Update information, to other pe, all generates according to described protocol update information such that it is able to trigger each pe in this multicast group vpn1 Convergent point information table.As shown in Figure 7a, the nlri entrained by bgp update information can be sent out in the way of bgp notice by pe3 Give pe1 and pe2.
Step 610, pe1 and pe2 foundation receives bgp update information and generates the corresponding convergent point of this multicast group vpn1 Information table.
Wherein, the convergent point information table that pe1 and pe2 is generated can be as shown in Table 1 above.
In embodiments of the present invention, pe1 and pe2, can be from this bgp when receiving the bgp update information of pe3 transmission Extract nlri in update information, and can be 8 according to the value of the route-type entrained by this nlri, determine that this nlri is rp Synchronization routing, and can locally carry out to the 8th class bgp route introduce.Specifically, if the 8th class bgp route meets Locally configured introducing condition, then introduce to the 8th class bgp route, that is, pass through this bgp route is parsed, parse Rp information and bgp far-end neighbour's information, to generate convergent point information table as shown in Table 1 above.
For example, pe1 and pe2 can be detected whether and rd locally being configured by detecting the rd entrained by this nlri Join, to determine entrained by this nlri the 8th class bgp route whether meet locally configured introducing condition coupling, such that it is able to When rd entrained by nlri is mated with the rd locally being configured, determine that the 8th class bgp route entrained by this nlri meets and locally join Put introducing condition, this bgp route is parsed, parse rp information and bgp far-end neighbour's information, thus in local maintenance one The address list item of individual rp, that is, generate convergent point information table as shown in Table 1 above.When pe1 and pe2 equipment generates convergent point information After table, a route confirmation can be responded with pe3, this protocol update letter is had been introduced into response pe1 and pe2 equipment The entrained synchronization routing of breath.This is carried together it is possible to no longer send to pe1 and pe2 after pe3 receives this route determination information Step by protocol update information.
Optionally, pe3 can determine information receiving the route that pe1 sent, and it is true not receive the route that pe2 sent When determining information, protocol update information can be sent according to default time interval to pe2, to avoid due to carrying this protocol update The loss of information and lead to pe2 not receive the situation of this protocol update information.It can be seen that, the specific pe of the embodiment of the present invention is permissible Judge whether each opposite end pe receives protocol update information by routeing determination information, thus ensure that each in multicast group Opposite end pe can receive protocol update information, and generates corresponding convergent point information table according to this protocol update information.
Step 612, after rp information table generates, pe1 and pe2 can actively go to set up p-tunnel.
The p-tunnel that pe1 is set up is the tunnel1 in Fig. 7 a, and the source address of tunnel1 is 1.1.1.1, purpose Address is 3.3.3.3;The p-tunnel that pe2 is set up is in Fig. 7 a and tunnel2, and the source address of tunnel2 is 2.2.2.2, destination address is 3.3.3.3.After the multicast source hung under pe1 has multicast packet to enter pe1 equipment, pe1 can To inquire about rp information table, by tunnel1 by transmitting multicast data to pe3;When the multicast receiver hanging under pe2 has multicast to add It is also possible to multicast packet is sent to by pe3 by tunnel2 when request enters.
The embodiment of the present invention can be by increasing the 8th class route of mvpn, with using the 8th newly-increased class route synchronization mvpn Rp information between neighbours, so that the message transmission of bsr is no longer dependent on inclusive p-tunnel, can utilize bgp simultaneously Agreement is protected to the forwarding of the transmission of bsr information in mvpn and any multicast source data, thereby may be ensured that multicast industry The normal use of business.
In the embodiment of the present invention, the pe in mvpn can generate rp information table using the 8th newly-increased class route, you can with The establishment to carry out p-tunnel for the rp information table synchronously being come by far-end, such as creates selective p-tunnel, with And can need not create inclusive p-tunnel, such that it is able to avoid pe by this p-tunnel come multicast data forwarding It is switched to inclusive p-tunnel from selective p-tunnel and lead to the problem of business data transmission interruption.
Certainly, if there being the multicast domain that newly-increased pe adds this mvpn, pe3 can set up neighbours' with newly-increased pe Simultaneously can also be directly to newly-increased pe synchronization rp information.For example, when pe4 adds multicast group vpn1 in above-mentioned example, such as scheme Shown in 7b, protocol update information can be sent to pe4 by pe3, so that pe4 can adopt protocol update information generates this multicast Group vpn1 corresponding rp information table, to create corresponding p-tunnel using this rp information table, such as creates the tunnel in Fig. 7 b 3.The source address of this tunnel 3 is 5.5.5.5, and destination address is 3.3.3.3.
Optionally, if pe exits the multicast domain of mvpn, the pe that this exits can delete its specific pe with this mvpn Between neighborhood simultaneously, delete in local convergent point information to should the corresponding rp of specific pe address list item, thus Delete the selective p-tunnel between the pe exiting and specific pe.
In a preferred embodiment of the invention, this information transmitting methods can also include: when convergent point changes When, the address using the convergent point after change is updated to the convergent point information table of each pe in described multicast group.
In embodiments of the present invention, if rp node changes, topology carries out rp information updating to mvpn entirely, that is, adopt The convergent point information table of each pe in this multicast group is updated for the address of the convergent point after change it is ensured that a rp information exists In mvpn domain, rp is up to thus realize path that each pe in this multicast group converged to the corresponding convergent point of this multicast group Excellent.
To sum up, the embodiment of the present invention can increased and/or deleting in mvpn by the synchronization mechanism of newly-increased rp information Pe when the corresponding rp information of this mvpn of synchronized update, it is achieved thereby that the forwarding of any multicast source data, be further ensured that group Broadcast the normal use of business.
It should be noted that for embodiment of the method, in order to be briefly described, therefore it is all expressed as a series of action group Close, but those skilled in the art should know, the embodiment of the present invention is not limited by described sequence of movement, because according to According to the embodiment of the present invention, some steps can be carried out using other orders or simultaneously.Secondly, those skilled in the art also should Know, embodiment described in this description belongs to preferred embodiment, the involved action not necessarily present invention is implemented Example is necessary.
Present embodiment discloses a kind of information transfer device, specifically can apply in the specific pe of multicast group.
Reference picture 8a, shows a kind of structured flowchart of information transfer device embodiment of the present invention, specifically can include As lower module:
Convergent point determining module 802, for determining the corresponding convergent point of multicast group.
Information generating module 804, generates protocol update information for the address according to described convergent point.
Information sending module 806, for described protocol update information is sent to each backbone edges router pe, so that Each pe in described multicast group all generates convergent point information table according to described protocol update information.Wherein, described convergent point information Table is used for creating the backbone network nucleus equipment tunnel in described multicast group.
Reference picture 8b, shows a kind of structured flowchart of information transfer device alternative embodiment of the present invention
Optionally, this information transfer device can also include neighborhood and sets up module 808.
In embodiments of the present invention, this neighborhood is set up module 808 and be can be used for setting up the neighborhood between pe.Letter Breath sending module 806 specifically may include that determination sub-module 8062 and sending submodule 8064.Wherein it is determined that submodule 8062, For according to described neighborhood, determining each pe belonging in described multicast group;Sending submodule 8064, for each to determine There is described protocol update information in pe.
In a preferred embodiment of the invention, protocol update information can carry described convergent point and correspond to multicast group The network segment.Wherein it is determined that submodule 8062, specifically can be used for based on described neighborhood, each in the described network segment by belonging to Pe is defined as each pe in described multicast group.
In a preferred embodiment of the invention, this information transfer device can also include: information table update module 810.This information table update module 810 can be used for when described convergent point changes, using the ground of the convergent point after change Location is updated to the convergent point information table of each pe in described multicast group.
Present embodiment discloses another kind of information transfer device, the specific pe with multicast group specifically can be applied to have neighbours In the opposite end pe of relation.
Reference picture 9a, shows the structured flowchart of another kind of information transfer device embodiment of the present invention, specifically can wrap Include as lower module:
Information analysis module 902, for when receiving protocol update information, parsing to protocol update information, obtaining Address to convergent point.
Information table generation module 904, for convergent point information table is generated using the address of described convergent point, wherein, described Convergent point information table is used for creating the backbone network nucleus equipment tunnel in the corresponding multicast group of described convergent point.
Reference picture 9b, shows the structured flowchart of another kind of information transfer device alternative embodiment of the present invention.
In a preferred embodiment of the invention, this information transfer device can also be included as lower module:
Confirmation feedback module 906, for after generating described convergent point information table, to the specific pe of described multicast group Feedback route confirmation, described route confirmation is used for protocol update information described in response, and described specific pe is for connecting institute State the pe of convergent point.
Tunnel creation module 908, for creating, based on described convergent point information table, the backbone network being connected with described specific pe Nucleus equipment tunnel, wherein, described backbone network nucleus equipment tunnel is used for transmitting the business datum in described multicast group.
For device embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, related Part illustrates referring to the part of embodiment of the method.
Each embodiment in this specification is all described by the way of going forward one by one, what each embodiment stressed be with The difference of other embodiment, between each embodiment identical similar partly mutually referring to.
Those skilled in the art are it should be appreciated that the embodiment of the embodiment of the present invention can be provided as method, device or calculate Machine program product.Therefore, the embodiment of the present invention can using complete hardware embodiment, complete software embodiment or combine software and The form of the embodiment of hardware aspect.And, the embodiment of the present invention can using one or more wherein include computer can With in the computer-usable storage medium (including but not limited to disk memory, cd-rom, optical memory etc.) of program code The form of the computer program implemented.
The embodiment of the present invention is with reference to method according to embodiments of the present invention, terminal unit (system) and computer program The flow chart of product and/or block diagram are describing.It should be understood that can be by computer program instructions flowchart and/or block diagram In each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or square frame combination.These can be provided Computer program instructions set to general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing terminals Standby processor is to produce a machine so that holding by the processor of computer or other programmable data processing terminal equipments The instruction of row produces for realizing in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame The device of the function of specifying.
These computer program instructions may be alternatively stored in and can guide computer or other programmable data processing terminal equipments So that the instruction being stored in this computer-readable memory produces bag in the computer-readable memory working in a specific way Include the manufacture of command device, this command device is realized in one flow process of flow chart or multiple flow process and/or one side of block diagram The function of specifying in frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing terminal equipments so that Series of operation steps is executed on computer or other programmable terminal equipments to produce computer implemented process, thus On computer or other programmable terminal equipments, the instruction of execution is provided for realizing in one flow process of flow chart or multiple flow process And/or the step of the function of specifying in one square frame of block diagram or multiple square frame.
Although having been described for the preferred embodiment of the embodiment of the present invention, those skilled in the art once know base This creative concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to Including preferred embodiment and fall into being had altered and changing of range of embodiment of the invention.
Last in addition it is also necessary to explanation, herein, such as first and second or the like relational terms be used merely to by One entity or operation are made a distinction with another entity or operation, and not necessarily require or imply these entities or operation Between there is any this actual relation or order.And, term " inclusion ", "comprising" or its any other variant meaning Covering comprising of nonexcludability, so that include a series of process of key elements, method, article or terminal unit not only wrapping Include those key elements, but also include other key elements being not expressly set out, or also include for this process, method, article Or the intrinsic key element of terminal unit.In the absence of more restrictions, by wanting that sentence "including a ..." limits It is not excluded that also there is other identical element in process, method, article or the terminal unit including described key element in element.
Above to a kind of information transmitting methods provided by the present invention and a kind of information transfer device, carry out detailed Jie Continue, specific case used herein is set forth to the principle of the present invention and embodiment, the explanation of above example is only It is to be used to help understand the method for the present invention and its core concept;Simultaneously for one of ordinary skill in the art, according to this Bright thought, all will change in specific embodiments and applications, and in sum, this specification content should not be managed Solve as limitation of the present invention.

Claims (12)

1. a kind of information transmitting methods are it is characterised in that include:
Determine the corresponding convergent point of multicast group;
Address according to described convergent point generates protocol update information;
Described protocol update information is sent to each backbone edges router pe, so that the equal foundation of each pe in described multicast group Described protocol update information generates convergent point information table, and wherein, described convergent point information table is used for creating in described multicast group Backbone network nucleus equipment tunnel.
2. method according to claim 1 is it is characterised in that also include:
Set up the neighborhood between pe;
Wherein, described protocol update information is sent to each backbone edges router pe, comprising:
According to described neighborhood, determine each pe belonging in described multicast group;
Send described protocol update information to each pe determining.
3. method according to claim 2 is it is characterised in that described protocol update information carries described convergent point correspondence The network segment of multicast group;
Wherein, according to described neighborhood, determine each pe belonging in described multicast group, comprising: based on described neighborhood, will Belong to each pe in the described network segment and be defined as each pe in described multicast group.
4. according to the arbitrary described method of claims 1 to 3 it is characterised in that also including:
When described convergent point changes, using the convergent point to each pe in described multicast group for the address of the convergent point after change Information table is updated.
5. a kind of information transmitting methods are it is characterised in that include:
When receiving protocol update information, described protocol update information is parsed, obtains the address of convergent point;
Address using described convergent point generates convergent point information table, and wherein, described convergent point information table is used for creating described remittance Backbone network nucleus equipment tunnel in the corresponding multicast group of accumulation.
6. method according to claim 5 is it is characterised in that also include:
After generating described convergent point information table, to the specific pe feedback route confirmation of described multicast group, described route is true Recognize information for protocol update information described in response, described specific pe is the pe connecting described convergent point;
The backbone network nucleus equipment tunnel being connected with described specific pe, wherein, described bone are created based on described convergent point information table Dry net nucleus equipment tunnel is used for transmitting the business datum in described multicast group.
7. a kind of information transfer device is it is characterised in that include:
Convergent point determining module, for determining the corresponding convergent point of multicast group;
Information generating module, generates protocol update information for the address according to described convergent point;
Information sending module, for described protocol update information is sent to each backbone edges router pe, so that described group The each pe broadcasting in group all generates convergent point information table according to described protocol update information, and wherein, described convergent point information table is used for Create the backbone network nucleus equipment tunnel in described multicast group.
8. device according to claim 7 is it is characterised in that also include:
Neighborhood sets up module, for setting up the neighborhood between pe;
Wherein, described information sending module, comprising:
Determination sub-module, for according to described neighborhood, determining each pe belonging in described multicast group;
Sending submodule, for sending described protocol update information to each pe determining.
9. device according to claim 8 is it is characterised in that described protocol update information carries described convergent point correspondence The network segment of multicast group;
Wherein, described determination sub-module, specifically for based on described neighborhood, each pe belonging in the described network segment being defined as Each pe in described multicast group.
10. according to the arbitrary described device of claim 7 to 9 it is characterised in that also including:
Information table update module, for when described convergent point changes, using the convergent point after change address to described In multicast group, the convergent point information table of each pe is updated.
A kind of 11. information transfer devices are it is characterised in that include:
Information analysis module, for when receiving protocol update information, parsing to described protocol update information, being converged The address of accumulation;
Information table generation module, generates convergent point information table for the address using described convergent point, wherein, described convergent point letter Breath table is used for creating the backbone network nucleus equipment tunnel in the corresponding multicast group of described convergent point.
12. devices according to claim 11 are it is characterised in that also include:
Confirmation feedback module, for after generating described convergent point information table, to the specific pe feedback road of described multicast group By confirmation, described route confirmation is used for protocol update information described in response, and described specific pe is to connect described convergence The pe of point;
Tunnel creation module, for creating, based on described convergent point information table, the backbone network nucleus equipment being connected with described specific pe Tunnel, wherein, described backbone network nucleus equipment tunnel is used for transmitting the business datum in described multicast group.
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