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.