CN104052672B - A kind of method of realizing group broadcasting and equipment based on LISP - Google Patents
A kind of method of realizing group broadcasting and equipment based on LISP Download PDFInfo
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- CN104052672B CN104052672B CN201410242600.9A CN201410242600A CN104052672B CN 104052672 B CN104052672 B CN 104052672B CN 201410242600 A CN201410242600 A CN 201410242600A CN 104052672 B CN104052672 B CN 104052672B
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Abstract
The invention discloses a kind of method of realizing group broadcasting based on LISP and equipment, this method includes：Tunnel router sends in registration message, the registration message to MS after BSR agent functionalitys are enabled and carries the information that the tunnel router has enabled BSR agent functionalitys；First Bootstrap message is sent to the MS by the tunnel router when receiving the first Bootstrap message；The tunnel router receives the second Bootstrap message from other tunnel routers of the MS forwardings, and first (EID, RLOC) mapping table is generated using the address information carried in second Bootstrap message.In the embodiment of the present invention, it is possible to achieve PIM SM protocol massages cross over the transmission of LISP networks, LISP multicast functionalitys are realized in the case where ITR/ETR does not know multicast source address, and effectively support LISP networks.
Description
Technical field
The present invention relates to communication technical field, especially a kind of method of realizing group broadcasting and equipment based on LISP.
Background technology
As shown in figure 1, being LISP (Location/ID Separation Protocol, position and identity separated protocol)
The networking schematic diagram of network, the LISP networks network ip address can be divided into EID (Endpoint ID, end mark) and
RLOC (Routing Locator, route locating).Wherein, EID-to-RLOC mapping relations can be introduced in LISP networks, should
EID is used to identify main frame, does not possess global routing function, and the RLOC is route for the whole network.In LISP networks, IPv4 or
IPv6 main frames only identify its ID, and its position is by ITR (Ingress Tunnel Router, tunnel portal router)/ETR
(Egress Tunnel Router, tunnel outlet router) is identified.LISP networks include datum plane and control plane,
Datum plane is mainly used in the encapsulation/decapsulation and forwarding of message, and control plane mainly completes EID and RLOC mapping.
In LISP networks, LISP multicast functionalitys are realized by using current multicast protocol, its core concept is：
Multicast data message is carried out multicast encapsulation by ITR, is decapsulated by core network to ETR, and ETR is by the group after decapsulation
Multicast data message is transmitted again.
In the prior art, in order to realize LISP multicast functionalitys in LISP networks, ITR/ETR needs with knowing multicast source
Location, that is, need to know (EID, RLOC) mapping relations of multicast source.But, the networking for the LISP networks shown in Fig. 2 is illustrated
Figure, when multiple LISP networks constitute PIM SM (Protocol Independent Multicast-Sparse Mode, it is dilute
Dredge mode protocol independent multicast) domain when, ITR/ETR will be unable to know (EID, RLOC) mapping relations of multicast source, then can not
Realize LISP multicast functionalitys.
The content of the invention
The embodiment of the present invention provides a kind of method of realizing group broadcasting and equipment based on LISP, so that ITR/ETR is not knowing
LISP multicast functionalitys are realized in the case of multicast source address, and effectively support LISP networks.
In order to achieve the above object, the embodiment of the present invention provides a kind of method of realizing group broadcasting based on LISP, applied to bag
In the network for including mapping server MS and multiple tunnel routers, methods described includes：
Tunnel router sends registration message, the registration after BootStrap Router BSR agent functionalitys are enabled to the MS
The information that the tunnel router has enabled BSR agent functionalitys is carried in message；
The first of candidate bsr of the tunnel router in the LISP networks received where this tunnel router is certainly
During report text, first Bootstrap message is sent to the MS；
The tunnel router receives the second Bootstrap message from other tunnel routers of the MS forwardings, utilizes institute
State first (end identify EID, route locating RLOC) of the address information generation mapping table carried in the second Bootstrap message, and to institute
State the second Bootstrap message described in each device forwards in the LISP networks where tunnel router；Wherein, the EID for it is described its
The address information of the candidate bsr in LISP networks where its tunnel router, the RLOC is other tunnel routers
Address information.
The tunnel router utilizes the address information carried in second Bootstrap message to generate first (EID, RLOC)
After mapping table, in addition to：
Candidate convergent point of the tunnel router in the LISP networks where receiving this tunnel router is sent to BSR
First declaration message when, if BSR is in the LISP networks where other tunnel routers, utilize first (EID, RLOC)
Described first declaration message is sent to other tunnel routers by the information recorded in mapping table, by other tunnel routers by institute
State the first declaration message and be transmitted to BSR；
The letter that the tunnel router is recorded in other tunnel routers are received using first (EID, RLOC) mapping table
During the declaration message of second from candidate's convergent point of breath forwarding, given birth to using the address information carried in the described second declaration message
It is sent into second (EID, RLOC) mapping table, and by the described second declaration message in the LISP networks where this tunnel router
BSR；Wherein, the EID in described second (EID, RLOC) mapping table is the LISP where other tunnel routers
The address information of candidate's convergent point in network, and the RLOC is the address information of other tunnel routers.
The tunnel router generates second (EID, RLOC) using the address information carried in the described second declaration message
After mapping table, in addition to：
The 3rd of BSR of the tunnel router in the LISP networks received where this tunnel router reports certainly
Wen Shi, other tunnels are sent to using the information recorded in described second (EID, RLOC) mapping table by the 3rd Bootstrap message
Router, as in the LISP networks where the 3rd Bootstrap message is transmitted to other tunnel routers by other tunnel routers
Each equipment carry out convergent point election.
The tunnel router generates second (EID, RLOC) using the address information carried in the described second declaration message
After mapping table, in addition to：
Multicast source of the tunnel router in the LISP networks where receiving this tunnel router is sent to convergent point
Multicast data message when, if convergent point is in the LISP networks where other tunnel routers, using second (EID,
RLOC) multicast data message is sent to other tunnel routers by the information recorded in mapping table, is route by other tunnels
The multicast data message is sent to convergent point by device；
The letter that the tunnel router is recorded in other tunnel routers are received using second (EID, RLOC) mapping table
When ceasing the multicast data message from multicast source of forwarding, the multicast data message is sent to where this tunnel router
Convergent point in LISP networks, and receive (S, G) that the convergent point returns and join message, and will described in (S, G) join message
Other tunnel routers are sent to, and (S, G) is added described in other tunnel routers to multicast source forwarding
Message.
The embodiment of the present invention provides a kind of method of realizing group broadcasting based on position Yu identity separated protocol LISP, applied to bag
In the network for including mapping server MS and multiple tunnel routers, methods described includes：
The MS receives the registration message from tunnel router；Wherein, the tunnel is carried in the registration message
Router has enabled the information of BSR agent functionalitys；
The MS records the tunnel road when knowing that tunnel router has enabled BSR agent functionalitys in BSR mapping tables
Corresponding relation between the address information of device and the receiving interface of the registration message；
The MS receives the Bootstrap message from other tunnel routers, and utilizes the letter recorded in the BSR mapping tables
The Bootstrap message is transmitted to the tunnel router by breath.
The embodiment of the present invention provides a kind of tunnel router based on position Yu identity separated protocol LISP, applied to including
In the network of mapping server MS and multiple tunnel routers, the tunnel router includes：
Sending module, it is described for after BootStrap Router BSR agent functionalitys are enabled, registration message to be sent to the MS
The information that the tunnel router has enabled BSR agent functionalitys is carried in registration message；
, will in the first Bootstrap message for receiving the candidate bsr in the LISP networks where the tunnel router
First Bootstrap message is sent to the MS；
When receiving the second Bootstrap message from other tunnel routers of the MS forwardings, to the tunnel router
Second Bootstrap message described in each device forwards in the LISP networks at place；
Generation module, for when receiving second Bootstrap message, utilizing the ground carried in second Bootstrap message
Location information generation first (end identifies EID, route locating RLOC) mapping table, the EID is other tunnel router institutes
LISP networks in candidate bsr address information, the RLOC be other tunnel routers address information.
The sending module, be additionally operable to candidate's convergent point in the LISP networks where receiving the tunnel router to
During the first declaration message that BSR is sent, if the BSR utilizes institute in the LISP networks where other tunnel routers
State the information recorded in first (EID, RLOC) mapping table and the described first declaration message is sent to other tunnel routers, by institute
State other tunnel routers and the described first declaration message is transmitted to BSR；Described first is utilized receiving other tunnel routers
During the declaration message of second from candidate's convergent point of the information forwarding recorded in (EID, RLOC) mapping table, described second is declared
Accuse the BSR in the LISP networks where message is sent to this tunnel router；
The generation module, is additionally operable to record in other tunnel routers are received using first (EID, RLOC) mapping table
Information forwarding from candidate's convergent point second declaration message when, utilize described second declaration message in carry address letter
The EID in breath second (EID, RLOC) mapping table of generation, described second (EID, RLOC) mapping table is other tunnels
The address information of candidate's convergent point in LISP networks where router, and the RLOC is other tunnel routers
Address information.
The sending module, is additionally operable to receiving of the BSR in the LISP networks where the tunnel router
During three Bootstrap messages, the 3rd Bootstrap message is sent to using the information recorded in second (EID, RLOC) mapping table other
Tunnel router, as the LISP nets where the 3rd Bootstrap message is transmitted to other tunnel routers by other tunnel routers
Each equipment in network carries out the election of convergent point.
The sending module, is additionally operable to multicast source in the LISP networks where receiving the tunnel router to convergence
During the multicast data message that point is sent, if convergent point is in the LISP networks where other tunnel routers, second is utilized
The multicast data message is sent to other tunnel routers by the information recorded in (EID, RLOC) mapping table, by other tunnels
The multicast data message is sent to convergent point by router；Reflected receiving other tunnel routers using second (EID, RLOC)
During the multicast data message from multicast source of the information forwarding recorded in firing table, the multicast data message is sent to described
The convergent point in LISP networks where tunnel router, and receive (S, G) that the convergent point returns and join message, and by institute
State (S, G) and join message and be sent to other tunnel routers, and turned from other tunnel routers to the multicast source
(S, G) joins message described in hair.
The embodiment of the present invention provides a kind of mapping server MS based on position Yu identity separated protocol LISP, applied to bag
In the network for including the MS and multiple tunnel routers, the MS is specifically included：
Receiving module, for receiving the registration message from tunnel router；Wherein, institute is carried in the registration message
State the information that tunnel router has enabled BSR agent functionalitys；
Memory module, for when knowing that tunnel router has enabled BSR agent functionalitys, tunnel to be recorded in BSR mapping tables
Corresponding relation between the address information of road router and the receiving interface of registration message；
Sending module, for when receiving the Bootstrap message from other tunnel routers, using in the BSR mapping tables
The Bootstrap message is transmitted to tunnel router by the information of record.
Compared with prior art, the embodiment of the present invention at least has advantages below：In the embodiment of the present invention, as multiple LISP
When network constitutes a PIM SM domain, by tunnel router (such as tunnel portal router ITR and tunnel outlet router
ETR BSR (Bootstrap Router, BootStrap Router) agent functionality is enabled on), so as to realize PIM SM protocol massages
Across the transmission of LISP networks, regard multiple independent LISP networks as a PIM SM domain, unified election BSR and RP
(Rendezvous Point, convergent point), more selection schemes are provided for LISP multicasts, and can be in ITR/ETR not
LISP multicast functionalitys are realized in the case of knowing multicast source address, and effectively support LISP networks.
Brief description of the drawings
Fig. 1 and Fig. 2 are the networking schematic diagrams of the LISP networks proposed in the prior art；
Fig. 3 is a kind of method of realizing group broadcasting schematic flow sheet based on LISP that the embodiment of the present invention is proposed；
Fig. 4 is a kind of form schematic diagram for extension Map-register message that the embodiment of the present invention is proposed；
Fig. 5 and Fig. 6 are the form schematic diagrams being packaged to Bootstrap message that the embodiment of the present invention is proposed；
Fig. 7 is a kind of application schematic diagram for RPT building process that the embodiment of the present invention is proposed；
Fig. 8 is a kind of application schematic diagram for multicast data packet forwarding process that the embodiment of the present invention is proposed；
Fig. 9 is a kind of structural representation of tunnel router provided in an embodiment of the present invention；
Figure 10 is a kind of structural representation for mapping server MS that the embodiment of the present invention is proposed.
Embodiment
For problems of the prior art, the embodiment of the present invention provides a kind of method of realizing group broadcasting based on LISP,
This method is applied to include in MS (Map Server, mapping server) and the network of multiple tunnel routers, tunnel router
Can be tunnel portal router ITR and tunnel outlet router ETR.Illustrate using Fig. 2 as the application scenarios of the embodiment of the present invention
Figure, multiple LISP networks (i.e. LISP network As and LISP network Bs) constitute a PIM SM domains, tunnel router be ITR1,
ITR2, ETR1 and ETR2, multicast source are located in LISP network As, and recipient is located in LISP network Bs.ITR in LISP network As
It is connected by MR (Map Resolver, Mapping Resolution device) with MS, the ETR in LISP network Bs is directly connected with MS.In addition, C-
BSR1 (Candidate-BSR, candidate bsr), C-BSR2, C-BSR3 priority it is identical, its IP address is respectively 1.0.0.1/
24th, 2.2.0.1/24 and 2.2.0.2/24.C-RP1 (Candidate-RP, candidate RP) priority is 10, and IP address is
1.1.0.2/24, C-RP2, C-RP3 and C-RP4 priority are 1, and the multicast group range that all C-RP are serviced is identical.
DR (Designated Router, Designated Router) turns originator as the unique of multicast packet in shared network,
, it is necessary to be that shared network elects the corresponding DR of multicast source by hello packet in LISP network As, in LISP network Bs, it is necessary to
It is that shared network elects the corresponding DR of recipient by hello packet.The DR of DR election process and current PIM SM technologies is selected
Act process is identical, and here is omitted.
Specifically it may comprise steps of as shown in figure 3, being somebody's turn to do the method for realizing group broadcasting based on LISP：
Step 301, tunnel router sends registration message after BSR agent functionalitys are enabled to MS.Wherein, the registration
The information that tunnel router has enabled BSR agent functionalitys is carried in message.
Under the application scenarios shown in Fig. 2, after BSR agent functionalitys are enabled on ITR1 and ETR1, ITR1 can week
Phase property (setting a timer, the acquiescence transmission cycle can be 30s) is sent in registration message, and the registration message to MS to be carried
ITR1 has enabled the information of BSR agent functionalitys；ETR1 periodically (can set a timer, the acquiescence transmission cycle can be with
For 30s) carry the information that ETR1 has enabled BSR agent functionalitys into MS transmission registration message, and the registration message.
Wherein, the registration message that ITR1 and ETR1 is sent to MS can disappear for the Map-register (mapping registration) of extension
Breath, as shown in figure 4, the form schematic diagram of the Map-register message for extension, the Map-register message of the extension is led to
Reserved (reserved) field crossed in extension Map-register message, BSR agencies have been enabled to identify ITR1 or ETR1
Function.Such as：The 1bit of Reserved fields is defined as M, M=1 marks ITR1 or ETR1 has enabled BSR and acted on behalf of work(
Energy.
Step 302, MS records the tunnel when knowing that tunnel router has enabled BSR agent functionalitys in BSR mapping tables
Corresponding relation between the address information of router and the receiving interface of registration message.
Need to safeguard BSR mapping tables in the embodiment of the present invention, on MS, the BSR mapping tables are used to record tunnel router (
Enable the tunnel router of BSR agent functionalitys) address information and registration message (tunnel for having enabled BSR agent functionalitys is route
The registration message that device is sent to MS) receiving interface between corresponding relation.Based on this, MS is being received from tunnel router
After registration message, if tunnel router is parsed from the registration message has enabled BSR agent functionalitys, MS reflects in BSR
The corresponding relation between the address information of the tunnel router and the receiving interface of the registration message is recorded in firing table.
As shown in Fig. 2 MS is after the registration message from ITR1 is received, is learnt by parsing and send the registration message
ITR1 has enabled BSR agent functionalitys, and the address information (10.0.0.1/24) that MS records ITR1 in BSR mapping tables disappears with registration
Corresponding relation between the receiving interface (being assumed to be interface 1) of breath.MS passes through parsing after the registration message from ETR1 is received
Learn that the ETR1 for sending the registration message has enabled BSR agent functionalitys, MS records ETR1 address information in BSR mapping tables
Corresponding relation between the receiving interface (being assumed to be interface 2) of (11.0.0.1/24) and registration message.
Step 303, the of candidate bsr of the tunnel router in the LISP networks received where this tunnel router
During one Bootstrap message (i.e. BSM messages), first Bootstrap message is sent to MS.
As shown in Fig. 2 in LISP network As, C-BSR1 can send Bootstrap message to the all-router in LISP network As
(i.e. the first Bootstrap message), ITR1 has found that the source IP address of the Bootstrap message exists after the Bootstrap message from C-BSR1 is received
In local routing table, therefore ITR1 confirms candidate bsr of the Bootstrap message in the LISP network As where this ITR1, and right
The Bootstrap message carries out LISP encapsulation, and the Bootstrap message after LISP is encapsulated is sent to MS by MR.
As shown in figure 5, the form schematic diagram of LISP encapsulation is carried out to Bootstrap message for ITR1.MR is receiving LISP encapsulation
After Bootstrap message afterwards, pass through BGP (Border Gateway Protocol, Border Gateway Protocol)-over-GRE (Generic
Routing Encapsulation, generic route encapsulation) tunnel is sent to MS, as shown in fig. 6, being carried out for MR to Bootstrap message
The form schematic diagram of tunnel encapsulation.In Figure 5, the address of the non-ITR1 of source IP address in OH, purpose IP address is MR address；
In figure 6, the address of the non-ITR1 of source IP address in OH, purpose IP address is MS address.
As shown in Fig. 2 in LISP network Bs, C-BSR2 and C-BSR3 can be sent out to the all-router in LISP network Bs
Bootstrap message (i.e. the first Bootstrap message) is sent, ETR1 has found after the Bootstrap message from C-BSR2 and C-BSR3 is received respectively
The source IP address of Bootstrap message from C-BSR2 and C-BSR3 confirms to come from C-BSR2 and C- in local routing table
Candidate bsr of the BSR3 Bootstrap message in the LISP network Bs where this ETR1.Due to from C-BSR2 and C-BSR3 from
Report text is simultaneously in LISP network Bs, therefore ETR1 only can carry out LISP envelopes to the preferred Bootstrap message from C-BSR3
Dress, and Bootstrap message after LISP is encapsulated is sent to MS.
As shown in figure 5, the form schematic diagram of LISP encapsulation is carried out to Bootstrap message for ETR1.In Figure 5, the source IP in OH
The non-ITR1 in address address, purpose IP address is MS address.
Step 304, MS receives the first Bootstrap message from tunnel router, and the BSR mapping tables safeguarded using this MS
The information of middle record forwards first Bootstrap message to other tunnel routers.
As shown in Fig. 2 the information recorded in the BSR mapping tables that MS is safeguarded is：ITR1 address information (10.0.0.1/24)
With the corresponding relation between interface 1, the corresponding relation between ETR1 address information (11.0.0.1/24) and interface 2.It is based on
The information recorded in BSR mapping tables, when MS receives the first Bootstrap message from ITR1 by interface 1, utilizes ETR1 address
Corresponding relation between information (11.0.0.1/24) and interface 2, ETR1 is transmitted to by interface 2 by first Bootstrap message；MS
When receiving the first Bootstrap message from ETR1 by interface 2, ITR1 address information (10.0.0.1/24) and interface 1 are utilized
Between corresponding relation, first Bootstrap message is transmitted to by ITR1 by interface 1.
Step 305, tunnel router receives the second Bootstrap message from other tunnel routers of MS forwardings, and utilizes
The address information carried in second Bootstrap message generates first (EID, RLOC) mapping table, and to where this tunnel router
The Bootstrap message of each device forwards second in LISP networks.Wherein, the EID in first (EID, the RLOC) mapping table is other tunnels
The address information of the candidate bsr in LISP networks where road router, and RLOC is the address information of other tunnel routers.
As shown in Fig. 2 ITR1 receives the second Bootstrap message from ETR1 of MS forwardings, second Bootstrap message is process
Bootstrap message after LISP encapsulation, ITR1 to the second Bootstrap message by carrying out LISP decapsulations, to obtain original report certainly
Text.Afterwards, because the source IP address of Bootstrap message is not in local routing table, therefore ITR1 utilizes what is carried in the Bootstrap message
The EID that address information is generated in first (EID, RLOC) mapping table, first (EID, the RLOC) mapping table is corresponded to where ETR1
LISP network Bs in C-BSR3 address information (i.e. the address information of candidate bsr in Bootstrap message), and RLOC corresponds to
ETR1 address information (source IP address in Inner Header i.e. in Bootstrap message).In addition, ITR1 is to where this ITR1
LISP network As in each direct-connected device forward the Bootstrap message, the Bootstrap message is sent directly in LISP network As
All-router.
As shown in Fig. 2 ETR1 receives the second Bootstrap message from ITR1 of MS forwardings, second Bootstrap message is process
Bootstrap message after LISP encapsulation, ETR1 to the second Bootstrap message by carrying out LISP decapsulations, to obtain original report certainly
Text.Afterwards, because the source IP address of Bootstrap message is not in local routing table, therefore ETR1 utilizes what is carried in the Bootstrap message
The EID that address information is generated in first (EID, RLOC) mapping table, first (EID, the RLOC) mapping table is corresponded to where ITR1
LISP network As in C-BSR1 address information (i.e. the address information of candidate bsr in Bootstrap message), and RLOC corresponds to
ITR1 address information (source IP address in Inner Header i.e. in Bootstrap message).In addition, ETR1 is to where this ETR1
LISP network Bs in each direct-connected device forward the Bootstrap message, the Bootstrap message is sent directly in LISP network Bs
All-router.
Based on above-mentioned processing, Bootstrap message in LISP networks can across LISP network be sent in other LISP networks,
Router in each LISP networks can elect BSR based on BSR elections technology from candidate bsr.In the application scenarios shown in Fig. 2
Under, it is assumed that C-BSR3 is elected as the BSR in pim-sm domain.
After BSR is elected, in addition it is also necessary to elect RP from each C-RP of each LISP networks, based on this, the present invention is real
Applying the method for realizing group broadcasting based on LISP proposed in example can also comprise the following steps：
The candidate's convergent point of step 1, tunnel router in the LISP networks where receiving this tunnel router is sent out to BSR
During the first declaration message sent, if BSR is in the LISP networks where other tunnel routers, using first (EID,
RLOC) the first declaration message is sent to other tunnel routers by the information recorded in mapping table, will by other tunnel routers
First declaration message is transmitted to BSR.
As shown in Fig. 2 candidate convergent point (such as C-RP1s or C- of the ITR1 in the LISP network As where receiving this ITR1
When RP2) to the first declaration message of BSR (C-BSR3) transmissions, because C-BSR3 is in the LISP network Bs where ETR1, and
Being safeguarded on ITR1 has the EID in first (EID, RLOC) mapping table, and first (EID, the RLOC) mapping table to correspond to ETR1
The address information of C-BSR3 in the LISP network Bs at place, and RLOC corresponds to ETR1 address information, therefore ITR1 is being received
After first declaration message, it is possible to use the information recorded in first (EID, the RLOC) mapping table is entered to the first declaration message
Row LISP is encapsulated, and the first declaration message after LISP is encapsulated is transmitted directly to ETR1, and is reported first declaration by ETR1
Text is transmitted to C-BSR3.
Step 2, tunnel router are receiving the declaration report of second from candidate's convergent point of other tunnel router forwardings
Wen Shi, generates second (EID, RLOC) mapping table, and second is declared using the address information carried in the second declaration message
Message is sent to the BSR in the LISP networks where this tunnel router.Wherein, in second (EID, the RLOC) mapping table
The address information of candidate convergent points of the EID in the LISP networks where other tunnel routers, and RLOC is other tunnel roads
By the address information of device.
As shown in Fig. 2 ETR1 is when receiving the declaration message of second from C-RP1 of ITR1 forwardings, to second declaration
Message carries out LISP decapsulations, and the declaration message after the LISP is decapsulated is sent in the LISP network Bs where this ETR1
C-BSR3, and using declaring that the address information that is carried in message generates second (EID, RLOC) mapping table, this second (EID,
RLOC) the address information of the C-RP1 in LISP network As of the EID in mapping table where ITR1, and RLOC is ITR1 address
Information.ETR1 carries out LISP solutions when receiving the declaration message of second from C-RP2 of ITR1 forwardings to the second declaration message
Encapsulation, the declaration message after the LISP is decapsulated is sent to the C-BSR3 in the LISP network Bs where this ETR1, and using declaring
Accuse the EID in address information second (EID, the RLOC) mapping table of generation carried in message, second (EID, the RLOC) mapping table
For the address information of the C-RP2 in the LISP network As where ITR1, and RLOC is ITR1 address information.
Step 3, BSR (such as C-BSR3) collect the declaration report from each C-RP (such as C-RP1, C-RP2, C-RP3 and C-RP4)
Text, according to the C-RP addresses carried in these declaration messages, priority and its group scope serviced, collects for RP-Set (RP
Collection, i.e. the mapping relations database of multicast group and RP), and RP-Set is encapsulated in the 3rd Bootstrap message, and with broadcast mode
Send the 3rd Bootstrap message.
When C-BSR3 sends three Bootstrap messages with broadcast mode, the 3rd Bootstrap message can be sent to LISP networks
In each equipment in B, and ETR1 can receive the 3rd Bootstrap message from C-BSR3.
The BSR of step 4, tunnel router in the LISP networks received where this tunnel router the 3rd bootstrapping
During message, the 3rd Bootstrap message is sent to other tunnels using the information recorded in second (EID, RLOC) mapping table and route
Device, and as each in the LISP networks where the 3rd Bootstrap message is transmitted to other tunnel routers by other tunnel routers
Equipment carries out the election of convergent point.
As shown in Fig. 2 the 3rd of BSRs (i.e. C-BSR3) of the ETR1 in the LISP network Bs received where this ETR1 the
During Bootstrap message, due to C-s of the EID in ETR1 second (EID, RLOC) mapping table in the LISP network As where ITR1
RP1 or C-RP2 address information, and RLOC is ITR1 address information, therefore, ETR1 can utilize second (EID, RLOC)
3rd Bootstrap message is sent to ITR1 by the information recorded in mapping table.Afterwards, the 3rd Bootstrap message is transmitted to by ITR1
Each equipment in LISP network As where ITR1 carries out the election of convergent point.
After above-mentioned processing, the all-router in LISP network As and LISP network Bs can be received from C-BSR3
Bootstrap message, it is possible to the information provided according to RP-Set, according to following principle from numerous C-RP be specific multicast group selection
Its corresponding RP：(a) the group scope that C-RP is serviced is compared first, the group scope smaller serviced wins；If (b) servicing
Group scope is identical, then compares C-RP priority, and priority the higher person is won；If (c) priority is also identical, Hash letters are reused
Number calculates hash value, and the greater is won；If (d) hash value is also identical, C-RP IP address the greater is won.Advised more than
Then, the RP that the C-RP1 in LISP network As will be elected as in pim-sm domain.
After above-mentioned processing, when multiple LISP networks constitute a PIM SM domain, across the multiple of pim-sm domain
BSR (i.e. C-BSR3) and RP (i.e. C-RP1) will be elected between LISP networks, based on the BSR and RP elected, it is possible to achieve
PIM SM protocol massages cross over the transmission of LISP networks, it is possible to regard multiple independent LISP networks as a PIM SM domain,
Unified election BSR and RP, so as to provide more selection schemes for LISP multicasts, and can not know group in ITR/ETR
LISP multicast functionalitys are realized in the case of broadcasting source address, it is possible to effective to support LISP networks.
After BSR (i.e. C-BSR3) and RP (i.e. C-RP1) is elected, for process for registering the multicast source, the present invention is implemented
The method of realizing group broadcasting based on LISP proposed in example can also comprise the following steps：
The multicast source of step 1, tunnel router in the LISP networks where receiving this tunnel router is sent out to convergent point
During the multicast data message sent, if convergent point is in the LISP networks where other tunnel routers, using second (EID,
RLOC) multicast data message is sent to other tunnel routers by the information recorded in mapping table, will by other tunnel routers
Multicast data message is sent to convergent point.
Step 2, tunnel router when receiving the multicast data message from multicast source of other tunnel routers forwarding,
Multicast data message is sent to the convergent point in the LISP networks where this tunnel router.
As shown in Fig. 2 multicast sources of the ITR1 in the LISP network As where receiving this ITR1 is sent out to convergent point (C-RP1)
During the multicast data message sent, because C-RP1 is in the LISP network As where this ITR1, therefore, ITR1 is directly by multicast packet
Message is transmitted to C-RP1, and the process is same as the prior art, will not be repeated here.LISPs of the ETR1 where this ETR1 is received
During the multicast data message that the multicast source in network B is sent to convergent point (C-RP1), because C-RP1 is in the LISP where ITR1
In network A, and the ground of C-RP1s of the EID in the LISP network As where ITR1 in ETR1 second (EID, RLOC) mapping table
Location information, RLOC is ITR1 address information, therefore ETR1 can directly utilize what is recorded in second (EID, RLOC) mapping table
Multicast data message is sent to ITR1 by information, and is receiving the multicast data message from multicast source of ETR1 forwardings by ITR1
When, multicast data message is sent to the convergent point (C-RP1) in the LISP network As where this ITR1.
Wherein, when the multicast source in LISP network Bs have sent a data message to multicast group G, it is connected with multicast source
DR after the data message is received, be encapsulated into multicast data message, and convergent point (C- is sent to by mode of unicast
RP1).The multicast data message can be sent on ETR1 first, because C-RP1 is in the LISP network As where ITR1, and multicast
The purpose IP address of data message is in second (EID, RLOC) mapping table, therefore ETR1 is directly carried out to the multicast data message
LISP is encapsulated, and multicast data message is sent into ITR1 using the information recorded in second (EID, RLOC) mapping table.ITR1
After multicast data message is received, LISP decapsulations are carried out to the multicast data message, and with mode of unicast by multicast datagram
Text is sent to the C-RP1 in the LISP network As where ITR1.
Step 3, convergent point (i.e. C-RP1) decapsulate logon message after multicast data message is received, on the one hand and will envelopes
The multicast data message being installed therein is transmitted to recipient along RPT ((Rendezvous Point Tree, shared tree)), separately
On the one hand (S, G) is sent to multicast source direction hop-by-hop to join message.
Step 4, convergent point to multicast source direction hop-by-hop send (S, G) join message when, tunnel router receive convergence
(S, the G) that point is returned joins message, and (S, G) is joined message is sent to other tunnel routers, and is route by other tunnels
Device forwards (S, G) to join message to multicast source.
Added as shown in Fig. 2 the multicast source direction hop-by-hop in convergent point (i.e. C-RP1) into LISP network Bs sends (S, G)
During message, ITR1 joins message (S, the G) that receives C-RP1 returns, and the progress LISP encapsulation that joined message to (S, the G), and
(S, G) after LISP is encapsulated, which joins message, is sent to ETR1, by ETR1 LISP is encapsulated after (S, G) join message progress
LISP is decapsulated, and continues to join message to multicast source direction hop-by-hop transmission (S, G).So, from RP (i.e. C-RP1) to multicast source
The router passed through is formed SPT, and ((Shortest Path Tree, shortest path tree) branch, these routers all exist
(S, G) list item is generated in its forward table.SPT is using the DR of multicast source as root, using RP as leaf.Afterwards, multicast source is sent
Multicast data message reaches C-RP1 along well-established SPT, then from C-RP1 by multicast data message along RPT to reception
Person is forwarded.After C-RP1 receives the multicast data message come along SPT forwardings, by mode of unicast to straight with multicast source
DR even sends stopped registration messages, and process for registering the multicast source terminates.
After BSR (i.e. C-BSR3) and RP (i.e. C-RP1) is elected, by taking Fig. 7 as an example, illustrate the phase of RPT building process
Pass is handled：(1) when Host C add a multicast group G, IGMP (Internet Group Management are first passed through
Protocol, Internet igmpinternet)) message notifying its direct-connected DR；(2) DR has grasped multicast group G recipient's letter
After breath, send and join message to the RP directions hop-by-hop where the multicast group；(3) router passed through from DR to RP is formed
RPT branch, these routers all generate (*, G) list item in its forward table, and " * " here represents to come from any multicast
Source.RPT is using RP as root, using DR as leaf., will be along well-established when multicast packet group G multicast data message is through RP
RPT reach DR, and then reach recipient.
After BSR and RP is elected, for datum plane, by taking Fig. 8 as an example, illustrate multicast data packet forwarding process
Relevant treatment：Assuming that the multicast group that recipient adds is 232.1.1.1, source IP of the multicast data message in a LISP network
Address is 5.1.0.1, and purpose IP address is 232.1.1.1；Source IP address of the multicast data message on public network is 10.0.0.1,
Purpose IP address is 232.1.1.1；Source IP address of the multicast data message in another LISP network is 5.1.0.1, purpose
IP address is 232.1.1.1.
The above method of the embodiment of the present invention is illustrated so that backbone network is IPv4 networks as an example, and the above method is also
Go for the situation that backbone network is IPv6 networks.In addition, the above method of the embodiment of the present invention be using LISP networks as
Illustrated exemplified by IPv4 networks, and the above method can be applicable to the situation that LISP networks are IPv6 networks, now seal
Dress combination has：LISP IPv4-in-IPv4, LISP IPv4-in-IPv6, LISP IPv6-in-IPv6 and LISP
Tetra- kinds of IPv6-in-IPv4.The above method of the embodiment of the present invention is entered exemplified by disposing PIM-SM between multiple LISP networks
Row explanation, and the above method can be applicable to dispose PIM-SM situation between non-LISP networks and LISP networks.
Based on the inventive concept same with the above method, additionally provided in the embodiment of the present invention a kind of based on position and identity
Separated protocol LISP tunnel router, applied to such as Fig. 9 in the network including mapping server MS and multiple tunnel routers
Shown, the tunnel router is specifically included：
Sending module 11, for after BootStrap Router BSR agent functionalitys are enabled, registration message, institute to be sent to the MS
State and the information that the tunnel router has enabled BSR agent functionalitys is carried in registration message；
, will in the first Bootstrap message for receiving the candidate bsr in the LISP networks where the tunnel router
First Bootstrap message is sent to the MS；
When receiving the second Bootstrap message from other tunnel routers of the MS forwardings, to the tunnel router
Second Bootstrap message described in each device forwards in the LISP networks at place；
Generation module 12, for when receiving second Bootstrap message, utilizing what is carried in second Bootstrap message
Address information generation first (end identifies EID, route locating RLOC) mapping table, the EID is other tunnel routers
The address information of candidate bsr in the LISP networks at place, the RLOC is the address information of other tunnel routers.
The sending module 11, is additionally operable to candidate's convergent point in the LISP networks where receiving the tunnel router
When first sent to BSR declares message, if the BSR is utilized in the LISP networks where other tunnel routers
Described first declaration message is sent to other tunnel routers by the information recorded in described first (EID, RLOC) mapping table, by
Described first declaration message is transmitted to BSR by other tunnel routers；Other tunnel routers are being received using described the
During the declaration message of second from candidate's convergent point of the information forwarding recorded in one (EID, RLOC) mapping table, by described second
Declaration message is sent to the BSR in the LISP networks where this tunnel router；
The generation module 12, is additionally operable to remember in other tunnel routers are received using first (EID, RLOC) mapping table
During the declaration message of second from candidate's convergent point of the information forwarding of record, the address carried in the described second declaration message is utilized
The EID that information generates in second (EID, RLOC) mapping table, described second (EID, RLOC) mapping table is other tunnels
The address information of candidate's convergent point in LISP networks where road router, and the RLOC is other tunnel routers
Address information.
The sending module 11, is additionally operable to receiving the BSR's in the LISP networks where the tunnel router
During three Bootstrap messages, the 3rd Bootstrap message is sent to other tunnels using the information recorded in second (EID, RLOC) mapping table
Road router, as the LISP networks where the 3rd Bootstrap message is transmitted to other tunnel routers by other tunnel routers
Interior each equipment carries out the election of convergent point.
The sending module 11, is additionally operable to multicast source in the LISP networks where receiving the tunnel router to remittance
During the multicast data message that accumulation is sent, if convergent point is in the LISP networks where other tunnel routers, the is utilized
The multicast data message is sent to other tunnel routers by the information recorded in two (EID, RLOC) mapping tables, by other tunnels
The multicast data message is sent to convergent point by road router；Second (EID, RLOC) is utilized receiving other tunnel routers
During the multicast data message from multicast source of the information forwarding recorded in mapping table, the multicast data message is sent to institute
State the convergent point in the LISP networks where tunnel router, and receive (S, G) that the convergent point returns and join message, and will
(S, the G), which joins message, is sent to other tunnel routers, and from other tunnel routers to the multicast source
(S, G) joins message described in forwarding.
Wherein, the modules of apparatus of the present invention can be integrated in one, and can also be deployed separately.Above-mentioned module can be closed
And be a module, multiple submodule can also be further split into.
Based on the inventive concept same with the above method, additionally provided in the embodiment of the present invention a kind of based on position and identity
Separated protocol LISP mapping server MS, applied in the network including the MS and multiple tunnel routers, such as Figure 10 institutes
Show, the mapping server MS is specifically included：
Receiving module 21, for receiving the registration message from tunnel router；Wherein, carried in the registration message
The tunnel router has enabled the information of BSR agent functionalitys；Memory module 22, for knowing that tunnel router enabled
During BSR agent functionalitys, recorded in BSR mapping tables between the address information of tunnel router and the receiving interface of registration message
Corresponding relation；Sending module 23, for when receiving the Bootstrap message from other tunnel routers, being mapped using the BSR
The Bootstrap message is transmitted to tunnel router by the information recorded in table.
Wherein, the modules of apparatus of the present invention can be integrated in one, and can also be deployed separately.Above-mentioned module can be closed
And be a module, multiple submodule can also be further split into.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can be by
Software adds the mode of required general hardware platform to realize, naturally it is also possible to which by hardware, but in many cases, the former is more
Good embodiment.Understood based on such, what technical scheme substantially contributed to prior art in other words
Part can be embodied in the form of software product, and the computer software product is stored in a storage medium, if including
Dry instruction is to cause a computer equipment (can be personal computer, server, or network equipment etc.) to perform this hair
Method described in each bright embodiment.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module or stream in accompanying drawing
Journey is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in device in embodiment can be divided according to embodiment description
It is distributed in the device of embodiment, respective change can also be carried out and be disposed other than in one or more devices of the present embodiment.On
The module for stating embodiment can be merged into a module, can also be further split into multiple submodule.
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.
Disclosed above is only several specific embodiments of the present invention, and still, the present invention is not limited to this, any ability
What the technical staff in domain can think change should all fall into protection scope of the present invention.
Claims (10)
1. a kind of method of realizing group broadcasting based on position Yu identity separated protocol LISP, applied to including mapping server MS and many
In the network of individual tunnel router, it is characterised in that methods described includes：
Tunnel router sends registration message, the registration message after BootStrap Router BSR agent functionalitys are enabled to the MS
It is middle to carry the information that the tunnel router has enabled BSR agent functionalitys；
The first of candidate bsr of the tunnel router in the LISP networks received where this tunnel router is reported certainly
Wen Shi, the MS is sent to by first Bootstrap message；
The tunnel router receives the second Bootstrap message from other tunnel routers of the MS forwardings, utilizes described the
The address information carried in two Bootstrap messages, which is generated, includes the first mapping table that end identifies EID and route locating RLOC, and to
Second Bootstrap message described in each device forwards in LISP networks where the tunnel router；Wherein, the EID is described
The address information of the candidate bsr in LISP networks where other tunnel routers, the RLOC is other tunnel routes
The address information of device.
2. the method as described in claim 1, it is characterised in that the tunnel router in second Bootstrap message using taking
The address information of band is generated after first mapping table, in addition to：
Candidate convergent point of the tunnel router in the LISP networks where receiving this tunnel router sent to BSR
During one declaration message, if BSR is in the LISP networks where other tunnel routers, remember using in first mapping table
Described first declaration message is sent to other tunnel routers by the information of record, is declared by other tunnel routers by described first
Message is transmitted to BSR；
The forwarding of information that the tunnel router is recorded in other tunnel routers are received using first mapping table come
When declaring message from the second of candidate's convergent point, include end using the address information generation carried in the described second declaration message
EID and route locating RLOC the second mapping table is identified, and the described second declaration message is sent to where this tunnel router
LISP networks in BSR；Wherein, the EID in second mapping table is where other tunnel routers
The address information of candidate's convergent point in LISP networks, and the RLOC is the address information of other tunnel routers.
3. method as claimed in claim 2, it is characterised in that the tunnel router is declared to take in message using described second
The address information of band is generated after second mapping table, in addition to：
BSR of the tunnel router in the LISP networks received where this tunnel router the 3rd Bootstrap message
When, the 3rd Bootstrap message is sent to other tunnel routers using the information recorded in second mapping table, by it
Each equipment that 3rd Bootstrap message is transmitted in the LISP networks where other tunnel routers by its tunnel router is entered
The election of row convergent point.
4. method as claimed in claim 2, it is characterised in that the tunnel router is declared to take in message using described second
The address information of band is generated after second mapping table, in addition to：
The group that multicast source of the tunnel router in the LISP networks where receiving this tunnel router is sent to convergent point
During multicast data message, if convergent point is in the LISP networks where other tunnel routers, second mapping table is utilized
The multicast data message is sent to other tunnel routers by the information of middle record, by other tunnel routers by the multicast
Data message is sent to convergent point；
The forwarding of information that the tunnel router is recorded in other tunnel routers are received using second mapping table come
From the multicast data message of multicast source when, the multicast data message is sent in the LISP networks where this tunnel router
Convergent point, and receive (S, G) that the convergent point returns and join message, and will described in (S, G) join message be sent to it is described
Other tunnel routers, and (S, G) joins message described in other tunnel routers to multicast source forwarding.
5. a kind of method of realizing group broadcasting based on position Yu identity separated protocol LISP, applied to including mapping server MS and many
In the network of individual tunnel router, it is characterised in that methods described includes：
The MS receives the registration message from tunnel router；Wherein, the tunnel route is carried in the registration message
Device has enabled the information of BSR agent functionalitys；
The MS records the tunnel router when knowing that tunnel router has enabled BSR agent functionalitys in BSR mapping tables
Address information and the registration message receiving interface between corresponding relation；
The MS receives the Bootstrap message from other tunnel routers, and will using the information recorded in the BSR mapping tables
The Bootstrap message is transmitted to the tunnel router.
6. a kind of tunnel router based on position Yu identity separated protocol LISP, applied to including mapping server MS and multiple
In the network of tunnel router, it is characterised in that the tunnel router includes：
Sending module, for after BootStrap Router BSR agent functionalitys are enabled, registration message, the registration to be sent to the MS
The information that the tunnel router has enabled BSR agent functionalitys is carried in message；
, will be described in the first Bootstrap message for receiving the candidate bsr in the LISP networks where the tunnel router
First Bootstrap message is sent to the MS；
When receiving the second Bootstrap message from other tunnel routers of the MS forwardings, where to the tunnel router
LISP networks in each device forwards described in the second Bootstrap message；
Generation module, for when receiving second Bootstrap message, being believed using the address carried in second Bootstrap message
Breath generation includes the first mapping table that end identifies EID and route locating RLOC, and the EID is other tunnel router institutes
LISP networks in candidate bsr address information, the RLOC be other tunnel routers address information.
7. tunnel router as claimed in claim 6, it is characterised in that
The sending module, is additionally operable to candidate's convergent point in the LISP networks where receiving the tunnel router to BSR
During the first declaration message sent, if the BSR is in the LISP networks where other tunnel routers, described the is utilized
Described first declaration message is sent to other tunnel routers by the information recorded in one mapping table, is route by other tunnels
Described first declaration message is transmitted to BSR by device；Recorded in other tunnel routers are received using first mapping table
During the declaration message of second from candidate's convergent point of information forwarding, the described second declaration message is sent to this tunnel router
BSR in the LISP networks at place；
The generation module, is additionally operable to the information forwarding recorded in other tunnel routers are received using first mapping table
From candidate's convergent point second declaration message when, using described second declaration message in carry address information generation include
The EID that end identifies in EID and route locating RLOC the second mapping table, second mapping table is other tunnels
The address information of candidate's convergent point in LISP networks where router, and the RLOC is other tunnel routers
Address information.
8. tunnel router as claimed in claim 7, it is characterised in that
The sending module, be additionally operable to receive the 3rd of the BSR in the LISP networks where the tunnel router from
During report text, the 3rd Bootstrap message is sent to other tunnels using the information recorded in second mapping table and route
Device, as each in the LISP networks where the 3rd Bootstrap message is transmitted to other tunnel routers by other tunnel routers
Equipment carries out the election of convergent point.
9. tunnel router as claimed in claim 7, it is characterised in that
The sending module, the multicast source being additionally operable in the LISP networks where receiving the tunnel router is sent out to convergent point
During the multicast data message sent, if convergent point utilizes described second in the LISP networks where other tunnel routers
The multicast data message is sent to other tunnel routers by the information recorded in mapping table, by other tunnel routers by institute
State multicast data message and be sent to convergent point；The information recorded in other tunnel routers are received using second mapping table
During the multicast data message from multicast source of forwarding, the multicast data message is sent to where the tunnel router
Convergent point in LISP networks, and receive (S, G) that the convergent point returns and join message, and will described in (S, G) join message
Other tunnel routers are sent to, and (S, G) is added described in other tunnel routers to multicast source forwarding
Message.
10. a kind of mapping server MS based on position Yu identity separated protocol LISP, applied to including the MS and multiple tunnels
In the network of road router, it is characterised in that the MS is specifically included：
Receiving module, for receiving the registration message from tunnel router；Wherein, the tunnel is carried in the registration message
Road router has enabled the information of BSR agent functionalitys；
Memory module, for when knowing that tunnel router has enabled BSR agent functionalitys, tunnel road to be recorded in BSR mapping tables
Corresponding relation between the address information of device and the receiving interface of registration message；
Sending module, for when receiving the Bootstrap message from other tunnel routers, being recorded using in the BSR mapping tables
Information the Bootstrap message is transmitted to tunnel router.
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| CN105591998B (en) | 2014-10-21 | 2019-01-08 | 新华三技术有限公司 | Inhibit the method and apparatus of periodic registration communication end point mark EID |
| CN105592000B (en) * | 2014-10-21 | 2018-10-09 | 新华三技术有限公司 | Position and mark separated protocol register method and device |
| US9843513B2 (en) * | 2015-03-20 | 2017-12-12 | Juniper Networks, Inc. | Multicast flow overlay using registration over a reliable transport |
| CN106330718B (en) * | 2016-08-23 | 2019-08-06 | 新华三技术有限公司 | Method for forwarding multicast message and device |
| CN106357541B (en) * | 2016-09-09 | 2019-12-17 | 新华三技术有限公司 | Information transmission method and device |
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