CN1889525A - Network equipment and method for realizing sparse mode protocol unrelated group broadcasting field hierarchy - Google Patents
Network equipment and method for realizing sparse mode protocol unrelated group broadcasting field hierarchy Download PDFInfo
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Abstract
A method for delaminating PIM-SM domain includes using edge node as candidate RP of multicast set served by local domain in global domain and using it as candidate RP of multicast set served by global domain in local domain, repositioning access of said RP in global domain to RP of said multicast set in local domain on edge node when edge node in global domain becomes RP of multicast set served by local domain and repositioning access of said RP in local domain to RP of said multicast set in global domain on edge node when edge node in local domain becomes RP of multicast set served by global domain.
Description
Technical field
The present invention relates to the multicast route technology, relate in particular to PIM-SM (Protocol IndependentMulitcast Sparse Mode, Protocol Independent Multicast-Sparse Mode) layered approach in territory and the network equipment of application thereof.
Background technology
The PIM-SM agreement is a multicast routing protocol the most ripe at present and that be most widely used.The PIM-SM protocol domain is usually with PMBR (PIM Multicast Border Router, the Protocol Independent Multicast border router) is the border, comprise the routing device of some interconnective operation PIM-SM agreements in the territory, the PIM-SM protocol domain connects Internet (the Internet) by PMBR.
Each multicast group in the pim-sm domain all has its RP (Rendezvous Point, point), is set up the shared tree (Shared Tree) of this multicast group towards RP transmission adding message by the router of other operations PIM-SM agreement.In order to allow other routers in the pim-sm domain learn the information of the RP of certain multicast group, candidate RP in the territory is regularly to BSR (BootStrap Router, BootStrap Router) sends candidate RP message, the multicast group that this candidate of notice BSR RP is served, promptly which multicast group RP this candidate RP is ready as.
In pim-sm domain, there is one or more router to be configured to candidate bsr usually, wherein one as BSR.The regular inundation BootStrap of BSR (bootstrapping) message, the router of notice in the pim-sm domain is about the information of self, multicast group information that candidate RP is served and the information of this candidate RP.Each receives the router of BootStrap message and selects a RP as this multicast group according to identical algorithm in the candidate RP of service same multicast group.Because the BootStrap message of receiving on these routers is identical, algorithm is identical, and therefore the RP that selects is also identical.Like this, the router in the pim-sm domain can be learnt the RP information of each multicast group.
According to the PIM-SM agreement, BSR can only have one in each pim-sm domain.When bigger or candidate RP quantity was many when the quantity of multicast group in the pim-sm domain, all candidate RP sent candidate RP message separately to BSR, and over-burden to cause BSR; Simultaneously, because BSR needs to encapsulate the information of all candidate RP in the whole pim-sm domain in a BootStrap message, the excessive and situation that causes some router to handle of the BootStrap message after may occurring encapsulating.This drawbacks limit the scale of pim-sm domain.
Summary of the invention
The present invention will solve is that the big or candidate RP quantity of multicast group quantity is carried out BSR for a long time over-burden and the excessive problem of BootStrap message in the PIM-SM protocol domain.
In the method for realization pim-sm domain of the present invention layering, this pim-sm domain comprises global field and the local field that is connected global field by fringe node, said method comprising the steps of:
With fringe node candidate's point RP as local field institute service multicast group in global field;
With fringe node candidate RP as global field institute service multicast group in local field;
When fringe node becomes the RP of local field institute service multicast group in global field, the RP of this multicast group in the local field will in the global field visit of this RP be redirected on fringe node;
When fringe node becomes the RP of global field institute service multicast group in local field, the RP of this multicast group in the global field will in the local field visit of this RP be redirected on fringe node.
Preferably, described fringe node comprises overall interface that connects global field and the local interface that is connected local field, wherein the address of overall interface is as the address of the candidate RP of local field institute service multicast group, and the address of local interface is as the address of the candidate RP of global field institute service multicast group.
Preferably, comprise overall BootStrap Router BSR in the described global field; Comprise local BSR in the described local field;
Described fringe node is specially as the candidate RP of local field institute service multicast group in global field: fringe node generates candidate RP message according to the multicast group information of extracting and is sent to Global B SR from the local field bootstrap message;
Described fringe node is specially as the candidate RP of global field institute service multicast group in local field: fringe node generates candidate RP message according to the multicast group information of extracting and is sent to local BSR from the global field bootstrap message.
Alternatively, described method also comprises: with fringe node respectively in global field and local field as the candidate RP of its service multicast group.
Preferably, described fringe node also comprises the information of fringe node as candidate RP institute service multicast group in the candidate RP message that generates according to the local field bootstrap message;
Described fringe node also comprises the information of fringe node as candidate RP institute service multicast group in the candidate RP message that generates according to the global field bootstrap message.
Preferably, described visit to RP comprises the message that is packaged with this RP information;
Described the RP of this multicast group is specially in the local field with in the global field visit of this RP being redirected on fringe node: on fringe node global field is revised as the RP information of this multicast group in the local field to the RP information in the described message of this RP, and the RP of this multicast group sends in local field;
Described the RP of this multicast group is specially in the global field with in the local field visit of this RP being redirected on fringe node: on fringe node local field is revised as the RP information of this multicast group in the global field to the RP information in the described message of this RP, and the RP of this multicast group sends in global field.
The present invention also provides the global field that is used for connecting in a kind of pim-sm domain in the pim-sm domain and the network equipment of local field, comprises overall interface, local interface, overall proxy module and local proxy module, wherein:
Overall situation interface is used for connecting global field;
Local interface is used for connecting local field;
Overall situation proxy module is used in global field the candidate RP of overall interface as local field institute service multicast group, and when overall interface becomes the RP of local field institute service multicast group, global field is redirected to the RP of this multicast group in the local field to the visit of this RP;
Local proxy module is used in local field the candidate RP of local interface as global field institute service multicast group, and when local interface becomes the RP of global field institute service multicast group, local field is redirected to the RP of this multicast group in the global field to the visit of this RP.
Preferably, described the candidate RP of overall interface as local field institute service multicast group is specially: overall proxy module extracts multicast group information from the local field bootstrap message, and the candidate RP message that generates address with overall interface and be candidate RP address sends from overall interface;
Described the candidate RP of local interface as global field institute service multicast group is specially: local proxy module extracts multicast group information from the global field bootstrap message, and the candidate RP message that generates address with local interface and be candidate RP address sends from local interface.
Preferably, the described network equipment also comprises local RP module, is used for respectively with overall interface and local interface candidate RP and the RP as present networks equipment institute service multicast group in global field and the local field.
Preferably, described local RP module connects overall proxy module; The information that comprises present networks equipment institute service multicast group in the candidate RP message that described overall proxy module generates;
Described local RP module connects local proxy module; The information that comprises present networks equipment institute service multicast group in the candidate RP message that described local proxy module generates.
The present invention is by being divided into pim-sm domain global field and local field, by the fringe node that connects global field and local field agency as each candidate RP in the local field in global field, in local field as the agency of each candidate RP in the global field, by the bootstrap message in fringe node isolation global field and the local field, thereby reduced the load of global field BSR and local field BSR simultaneously, limited the length of BootStrap message in global field and the local field; And by will redirect to real RP to the visit of acting on behalf of RP on fringe node, the present invention has realized the favorable compatibility with existing PIM-SM agreement.
Description of drawings
Fig. 1 is the topology example figure of pim-sm domain among the present invention;
Fig. 2 is the flow chart of the method for realization pim-sm domain of the present invention layering;
Fig. 3 is for being used as the structural representation of the network equipment of fringe node among the present invention;
Fig. 4 uses the schematic network structure of example for the present invention.
Embodiment
BSR and BootStrap message are used for to the multicast group in the pim-sm domain produces RP, and the size of the load of BSR and BootStrap message is mainly determined by the quantity of multicast group in the whole pim-sm domain and the quantity of candidate RP in the prior art.The quantity that reduces candidate RP can be that a plurality of multicast group services realize by making a candidate RP, but this mode may cause a RP to serve a plurality of multicast group, makes the load of this RP increase.Carry out the RP election if can make a candidate RP act on behalf of a plurality of candidate RP, when candidate RP agency becomes the RP of a plurality of multicast group, still bear the work of these multicast group RP respectively simultaneously, then can address this problem well by a plurality of candidate RP that acted on behalf of.
The scheme that the present invention adopts is divided into global field and one or more local field with a pim-sm domain, and global field is connected by fringe node with local field.Need to prove that the global field among the present invention and the setting of local field and the scope of dividing with BSR and RP election are foundation, and are connected irrelevant with the network physical of actual networking.Fringe node is operation PIM-SM agreement, all can be used as the routing device of candidate RP and RP in global field and local field, comprises overall interface and local interface, is used for connecting global field and local field respectively.The BSR of global field is called Global B SR, is the BSR of whole pim-sm domain; The BSR of local field is called local BSR, is responsible for the RP election of its place local field.
After pim-sm domain being divided into these two levels of global field and local field, in global field, by the agency of the fringe node that connects global field and local field, carry out the RP election in the global field, thereby reduce the quantity of candidate RP in the global field as candidate RP all in the local field; Simultaneously, fringe node carries out the RP election in the local field as the agency of candidate RP in the global field in local field.Like this, the candidate RP quantity in global field and local field has all obtained restriction.
Figure 1 shows that a kind of example structure of pim-sm domain among the present invention, this pim-sm domain comprises two local fields, local field 210 connects global field by fringe node 310, and the local interface of the local BSR211 in the local field 210, candidate RP212 and candidate RP213 and fringe node 310 route each other can reach; Local field 220 connects global field by fringe node 320, and the local interface of the local BSR221 in the local field 220, candidate RP 222 and candidate RP223 and fringe node 320 route each other can reach.Fringe node 310 and 320 overall interface and the Global B SR110 in the global field, candidate RP121,122 and 123 route each other can reach.
Fringe node 310 is acted on behalf of in the local field 210 candidate RP212 and 213 and is carried out the RP election in global field, act on behalf of candidate RP121 in the global field, 122 and 123 in local field 210, and carries out the RP election as local field 220 agencies' fringe node 320.Equally, fringe node 320 is acted on behalf of in the local field 220 candidate RP 222 and 223 and is carried out the RP election in global field, act on behalf of candidate RP121 in the global field, 122 and 123 in local field 220, and carries out the RP election as local field 210 agencies' fringe node 310.In the prior art, Global B SR110 is as the BSR of whole pim-sm domain, need in its BootStrap message, encapsulate the information of 7 candidate RP, after dividing global field and local field, only need the information of 5 candidate RP of encapsulation in BootStrap message, when reducing the BootStrap message size, reduced the load of BSR.
Among the present invention, when certain the candidate RP in the local field became the RP of certain multicast group, fringe node was regarded as the RP of this multicast group in global field, received in the global field visit to this multicast group RP; Fringe node will transfer to the visit of this multicast group RP by its agency's RP, i.e. the RP of this multicast group in the local field.Equally, when certain candidate RP became the RP of certain multicast group in the global field, fringe node was regarded as the RP of this multicast group in local field, received in the local field visit to this multicast group RP; Fringe node will transfer to the visit of this multicast group RP by its agency's RP, i.e. the RP of this multicast group in the global field.
In the PIM-SM agreement, when the multicast recipient in the pim-sm domain wishes to receive the multicast packet of certain multicast source, send IGMP (Internet Group ManagementProtocol to its direct-connected router, Internet Group Management Protocol) member relation report message indicates the multicast group of wishing adding in this message.As previously mentioned, router is determined the RP of this multicast group according to BootStap message, after receiving IGMP member relation report message, send adding message to the RP of this multicast group, and on this equipment, generate (*, G) multicast forwarding list item or the (* that is generating, G) inbound port of increase IGMP member relation report message in the multicast forwarding list item, wherein G is for adding the address of multicast group.Add the reservation multicast address that message uses with the PIM-SM agreement and be destination address, in message, encapsulated the address that will add multicast group and the address of this multicast group RP.Adding message is received the router and the router hop-by-hop between this multicast group RP of IGMP member relation report message and transmits to the RP of this multicast group, all has (*, multicast forwarding list item G) on these routers.
When the multicast source of this multicast group sends multicast packet, receive multicast packet with the direct-connected router of multicast source after, send Login message to the RP of this multicast group, the position of this multicast group multicast source of notice RP.The RP of this multicast group receives Login message, (then the router to direct-connected multicast source sends adding message for *, G) forwarding-table item if this locality has this multicast group, on the router of direct-connected multicast source and the all-router between the RP, generate (S, multicast forwarding list item G).Thus, just set up the shared tree of this multicast group.After shared tree was set up, multicast packet was transmitted according to the multicast forwarding list item on each router on the way from multicast source, arrives the multicast recipient.
(* when G) outbound port of multicast forwarding list item is empty, represents that this router no longer needs to receive the data of this multicast group on certain router.This moment, router sent leave group message to the RP of this multicast group, was similar to adding message, and the reservation multicast address that leave group message is used with the PIM-SM agreement is destination address, has encapsulated the address of the multicast group that will leave and the address of this multicast group RP in message.The router that receives leave group message is with the inbound port of this message (* from this equipment, G) delete in the outbound port of multicast forwarding list item, if (*, G) outbound port of multicast forwarding list item is the empty leave group message that then continues to send to next hop router this multicast group in the deletion back.
In the running of PIM-SM agreement, the RP information of multicast group is relevant with generation and delete procedure, the process for registering the multicast source etc. of shared tree.Therefore among the present invention, fringe node is except acting on behalf of the candidate RP in the other side territory respectively in global field and local field in the RP election, also need other are related in the visit of RP, as in the generation of shared tree and deletion, the corresponding protocol message being transmitted the RP that is acted on behalf of, can realize and being connected of existing PIM-SM agreement.So also make the groundwork of RP still be dispersed on the RP that is acted on behalf of by fringe node in local field or the global field and carry out, can not cause the overload of fringe node.
The flow process of the method for realization pim-sm domain of the present invention layering as shown in Figure 2.At step S210, with fringe node candidate RP as local field institute service multicast group in global field.As the agency of each candidate RP in the local field, the multicast group of being served with each candidate RP in the local field is as own multicast group of being served in global field, and notice Global B SR in global field for fringe node.Usually with address, the address of fringe node overall situation interface as the candidate RP of fringe node in global field.
At step S220, with fringe node candidate RP as global field institute service multicast group in local field.As the agency of each candidate RP in the global field, the multicast group of being served with each candidate RP in the global field is as own multicast group of being served in local field in local field for fringe node, and notifies local BSR.Usually with address, the address of fringe node local interface as the candidate RP of fringe node in local field.
Order between step S210 and the S220 can be exchanged.In the specific implementation of step S210 and S220, can on the overall interface of fringe node and local interface, start the PIM-SM agreement.When overall interface receives BootStrap message from Global B SR, from BootStrap message, extract the map information of each candidate RP in the global field and institute's service multicast group thereof, be stored in this locality, carrying out the RP election in the global field, identical in this process and the prior art to the processing of BootStrap message; Then with the multicast group information from the BootStrap message of global field, extracted as own multicast group of being served, address with local interface is the address generation candidate RP message of candidate RP, be sent to local BSR, notify the candidate RP of its local interface of local BSR for these multicast group.
To fringe node, when local interface receives BootStrap message from local BSR, from BootStrap message, extract the map information of each candidate RP in the local field and institute's service multicast group thereof, be stored in this locality, carrying out the RP election in the local field, identical in this process and the prior art to the processing of BootStrap message; Then with the multicast group information from the BootStrap message of local field, extracted as own multicast group of being served, address with overall interface is the address generation candidate RP message of candidate RP, be sent to Global B SR, the candidate RP that its overall interface of notice Global B SR is these multicast group.
Among the present invention, fringe node can be only as the agency between global field and the local field, also can also have the function of agency, candidate RP and Global B SR and/or local BSR simultaneously concurrently also as the candidate RP of certain or some multicast group in as the agency.
When fringe node during simultaneously as the candidate RP of certain or some multicast group, is that the address of candidate RP is encapsulated in the overall candidate RP message and is sent to Global B SR with the information of its service multicast group with overall interface, and is that the address of candidate RP is encapsulated in the local candidate RP message and is sent to local BSR with the local interface.Global B SR and local BSR comprise the map information of fringe node and service multicast group thereof in the BootStrap message that generates thereafter.
Because Global B SR and local BSR regularly send BootStrap message, fringe node receives in the BootStrap message of global field or local field and may be as yet the map information of fringe node and service multicast group thereof not to be included, therefore can generate when mailing to the candidate RP message of Global B SR according to local field BootStrap message aforementioned, in this candidate RP message, increase the information of fringe node institute service multicast group; Equally also can generate when mailing to the candidate RP message of local BSR according to global field BootStrap message aforementioned, in this candidate RP message, increase the information of fringe node institute service multicast group, can wait for that like this next one comprises the BootStrap message of more complete multicast group and candidate rp information, the gathering speed of multicast group and candidate rp information in quickening global field and the local field.
At step S230, in local field and global field, produce the RP of each multicast group respectively according to BootStrap message separately.When certain the candidate RP in the local field became the RP of certain multicast group, the RP of this multicast group was the overall interface of fringe node in the global field, and fringe node is acted on behalf of the RP of this multicast group in the local field in global field like this; When certain the candidate RP in the global field became the RP of certain multicast group, the RP of this multicast group was the local interface of fringe node in the local field, and fringe node is acted on behalf of the RP of this multicast group in the global field in local field like this.
At step S240, fringe node will redirect to the RP that is acted on behalf of to the visit of its agency's multicast group RP.Visit to multicast group RP mainly comprises adding message, leave group message and Login message etc., has encapsulated the RP information of this multicast group in these message.
When fringe node is acted on behalf of certain multicast group and is arranged in the RP of local field in global field, the adding message that is sent to this multicast group RP in the global field, leave group message etc. have been encapsulated the message of RP information, this multicast group RP information in the message has been revised as the RP that is sent to this multicast group in the local field after the RP information of this multicast group of being acted on behalf of in the local field; When fringe node is acted on behalf of certain multicast group and is arranged in the RP of global field in local field, the adding message that is sent to this multicast group RP in the local field, leave group message etc. have been encapsulated the message of RP information, this multicast group RP information in the message has been revised as the RP that is sent to this multicast group in the global field after the RP information of this multicast group of being acted on behalf of in the global field.
Through redirecting of fringe node, the message that has encapsulated RP information is sent to the node of this multicast group of actual execution RP function, make the process relevant in the scope of whole pim-sm domain, to carry out, thereby can not influence the follow-up repeating process of multicast packet and other PIM-SM agreement running with multicast group RP information.
Fig. 3 is the structural representation of the network equipment of application pim-sm domain layered approach of the present invention, this network equipment fringe node that connects global field and local field.Among Fig. 3, local RP module 35 is connected with overall interface 31, local interface 32, overall proxy module 33 and local proxy module 34 respectively; Overall situation proxy module 33 is connected with local interface 32 with overall interface 31 respectively; Local proxy module 34 also is connected with local interface 32 with overall interface 31 respectively.
Overall situation interface 31 connects global field, and local interface 32 connects local field.
Overall situation proxy module 33 extracts the multicast group information that each candidate RP is served in the local field in the BootStrap of local field message, the multicast group that these multicast group are served in global field as fringe node, address with overall interface 31 is the address generation candidate RP message of candidate RP, and the Global B SR to global field sends from overall interface 31.Like this, overall proxy module 33 with the candidate RP of overall interface 31 as local field institute service multicast group, participates in the RP election in the global field in global field.
Local proxy module 34 extracts the multicast group information that each candidate RP is served in the global field in the BootStrap of global field message, the multicast group that these multicast group are served in local field as fringe node, address with local interface 32 is the address generation candidate RP message of candidate RP, and the local BSR to local field sends from local interface 32.Like this, local proxy module 34 with the candidate RP of local interface 32 as global field institute service multicast group, participates in the RP election in the local field in local field.
Local RP module 35 be optional module, is used for realizing the candidate RP and the RP function of fringe node self when the described network equipment is used as the candidate RP of certain or some multicast group simultaneously.Local RP module 35 in global field with overall interface 31 as candidate RP and RP, in local field with local interface 32 as candidate RP and RP.At this moment, can in the candidate RP message of overall proxy module 33, increase the information of the network equipment self as candidate RP institute service multicast group according to the BootStrap message generation global field of local field; Equally also can in the candidate RP message of local proxy module 34, increase the information of the network equipment self as candidate RP institute service multicast group according to the BootStrap message generation local field of global field.
When overall interface 31 became the RP of local field institute service multicast group in global field, the described network equipment became the agency of this multicast group RP in local field.Overall situation interface 31 with global field to the access transport of this multicast group RP to overall proxy module 33, the visit of this multicast group RP mainly comprised add the message that message, leave group message, Login message etc. have encapsulated multicast group RP information.The information that overall situation proxy module 33 will encapsulate this multicast group RP in the message of RP information is revised as the information of this multicast group RP that is acted on behalf of in the local field by overall interface 31, and amended message sent from local interface 32, will the visit of this multicast group RP be redirected to this multicast group RP that is acted on behalf of in the local field.
When local interface 32 became the RP of global field institute service multicast group in local field, the described network equipment became the agency of this multicast group RP in global field.Local interface 32 with local field to the access transport of this multicast group RP to local proxy module 34, the visit of this multicast group RP mainly comprised add the message that message, leave group message, Login message etc. have encapsulated multicast group RP information.The information that local proxy module 34 will encapsulate this multicast group RP in the message of RP information is revised as the information of this multicast group RP that is acted on behalf of in the global field by local interface 32, and amended message sent from overall interface 31, will the visit of this multicast group RP be redirected to this multicast group RP that is acted on behalf of in the global field.
If the described network equipment self is also as candidate RP, overall interface 31 and local interface 32 may become the RP of institute's service multicast group respectively in global field and local field.At this moment, global field transfers to local RP module 35 to the visit of this multicast group RP by overall interface 31, local field transfers to local RP module 35 to the visit of this multicast group RP by local interface 32, is responded according to existing PIM-SM agreement from corresponding interface respectively by local module 35.
Among the present invention, in local field, act on behalf of candidate RP in the global field by fringe node, in global field, act on behalf of the candidate RP in the local field, in the RP election process pim-sm domain being divided into global field and local field carries out respectively, thereby reduced the load of Global B SR and local BSR, reduced the size of BootStrap message simultaneously; Fringe node is acted on behalf of the RP in the global field in local field, act on behalf of the RP in the local field in global field, makes that the division to global field and local field can not influence the generation of shared tree and the forwarding of conversion and multicast packet, compatible as much as possible PIM-SM agreement.
Be understood that, except the division of a plurality of local fields of supporting global field, can also further be divided into local field and one to a plurality of local subdomains among the present invention, realize the two-layer and sandwich construction of pim-sm domain certain local field.
Below illustrate a kind of concrete application of the present invention.Supervisory control system is set up in key points such as each public institution, traffic main arteries in each city of safety engine request of China, and uses mass storage system (MSS) storage recorded video data.The safety engineering proposal configuration of the previous typical urban of order is: city office has 20 branch offices under its command, and each branch office has 25 local police stations under its command, and each local police station is provided with 1000 cameras; Each camera is 1 multicast source, distributes a multicast group address, uses for observer's program request; Each camera also is simultaneously a clean culture source, is used for storage to memory device; Can check the picture that any one camera monitors between city office, each branch office, each local police station.
Figure 4 shows that the schematic network structure of above-mentioned typical urban, each local police station sets up a candidate RP usually, and the multicast group that this candidate RP served is the local affiliated multicast group of camera of this local police station; Each city is as a pim-sm domain, and BSR is located on the router of city office.
The pim-sm domain of a typical urban has at least 500 candidate RP, the BootStrap message of this pim-sm domain is excessive in the prior art, has surpassed the disposal ability of router commonly used, and the processing of candidate RP message is made the BSR of city office, and over-burden.
Use the present invention in the pim-sm domain of typical urban, each branch office is divided into a local field, still the router with local police station is the multicast group that candidate RP serves its local camera place in each local field; Router with each branch office serves as to connect the local field of this branch office and the fringe node of global field, and the router of branch office can also be as the local BSR of this local field in as fringe node; Still with the router of city office as Global B SR.
In global field, the router of each branch office is participated in the RP election as the candidate RP of this branch office local camera place multicast group, and is regarded as the RP of this branch office local camera place multicast group in global field.In the local field of certain branch office, the router of this branch office is participated in the RP election as the candidate RP of other branch offices local camera place multicast group, and is regarded as the RP of other branch offices local camera place multicast group in this local field.
As seen, for Global B SR, the candidate RP quantity of need handling drops to the sum of whole city branch office by the sum of whole city local police station, greatly reduces the load of city office router, has limited the BootStrap message size of city office router.For local BSR, the candidate RP quantity that needs processing is that the sum of local local police station of this branch office adds the branch office's router as the global field agency, can not cause overweight load and excessive BootStrap message equally.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.
Claims (10)
1. method that realizes the layering of Protocol Independent Multicast-Sparse Mode pim-sm domain, described pim-sm domain comprises global field and the local field that is connected global field by fringe node, it is characterized in that, said method comprising the steps of:
With fringe node candidate's point RP as local field institute service multicast group in global field;
With fringe node candidate RP as global field institute service multicast group in local field;
When fringe node becomes the RP of local field institute service multicast group in global field, the RP of this multicast group in the local field will in the global field visit of this RP be redirected on fringe node;
When fringe node becomes the RP of global field institute service multicast group in local field, the RP of this multicast group in the global field will in the local field visit of this RP be redirected on fringe node.
2. realize the method for pim-sm domain layering according to claim 1, it is characterized in that: described fringe node comprises overall interface that connects global field and the local interface that is connected local field, wherein the address of overall interface is as the address of the candidate RP of local field institute service multicast group, and the address of local interface is as the address of the candidate RP of global field institute service multicast group.
3. realize the method for pim-sm domain layering as claimed in claim 1 or 2, it is characterized in that: comprise overall BootStrap Router BSR in the described global field; Comprise local BSR in the described local field;
Described fringe node is specially as the candidate RP of local field institute service multicast group in global field: fringe node generates candidate RP message according to the multicast group information of extracting and is sent to Global B SR from the local field bootstrap message;
Described fringe node is specially as the candidate RP of global field institute service multicast group in local field: fringe node generates candidate RP message according to the multicast group information of extracting and is sent to local BSR from the global field bootstrap message.
4. as the method for realization pim-sm domain layering as described in the claim 3, it is characterized in that described method also comprises: with fringe node respectively in global field and local field as the candidate RP of its service multicast group.
5. as the method for realization pim-sm domain layering as described in the claim 4, it is characterized in that: described fringe node also comprises the information of fringe node as candidate RP institute service multicast group in the candidate RP message that generates according to the local field bootstrap message;
Described fringe node also comprises the information of fringe node as candidate RP institute service multicast group in the candidate RP message that generates according to the global field bootstrap message.
6. realize the method for pim-sm domain layering as claimed in claim 1 or 2, it is characterized in that: described visit to RP comprises the message that is packaged with this RP information;
Described the RP of this multicast group is specially in the local field with in the global field visit of this RP being redirected on fringe node: on fringe node global field is revised as the RP information of this multicast group in the local field to the RP information in the described message of this RP, and the RP of this multicast group sends in local field;
Described the RP of this multicast group is specially in the global field with in the local field visit of this RP being redirected on fringe node: on fringe node local field is revised as the RP information of this multicast group in the global field to the RP information in the described message of this RP, and the RP of this multicast group sends in global field.
7. the network equipment in the pim-sm domain is used for connecting global field and local field in the pim-sm domain, it is characterized in that, comprises overall interface, local interface, overall proxy module and local proxy module, wherein:
Overall situation interface is used for connecting global field;
Local interface is used for connecting local field;
Overall situation proxy module is used in global field the candidate RP of overall interface as local field institute service multicast group, and when overall interface becomes the RP of local field institute service multicast group, global field is redirected to the RP of this multicast group in the local field to the visit of this RP;
Local proxy module is used in local field the candidate RP of local interface as global field institute service multicast group, and when local interface becomes the RP of global field institute service multicast group, local field is redirected to the RP of this multicast group in the global field to the visit of this RP.
8. as the network equipment in the pim-sm domain as described in the claim 7, it is characterized in that, described the candidate RP of overall interface as local field institute service multicast group is specially: overall proxy module extracts multicast group information from the local field bootstrap message, and the candidate RP message that generates address with overall interface and be candidate RP address sends from overall interface;
Described the candidate RP of local interface as global field institute service multicast group is specially: local proxy module extracts multicast group information from the global field bootstrap message, and the candidate RP message that generates address with local interface and be candidate RP address sends from local interface.
9. as the network equipment in the pim-sm domain as described in the claim 8, it is characterized in that: the described network equipment also comprises local RP module, is used for respectively with overall interface and local interface candidate RP and the RP as present networks equipment institute service multicast group in global field and the local field.
10. as the network equipment in the pim-sm domain as described in the claim 9, it is characterized in that: described local RP module connects overall proxy module; The information that comprises present networks equipment institute service multicast group in the candidate RP message that described overall proxy module generates;
Described local RP module connects local proxy module; The information that comprises present networks equipment institute service multicast group in the candidate RP message that described local proxy module generates.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100508467C (en) * | 2007-04-13 | 2009-07-01 | 华为技术有限公司 | Method and route equipment for retransmitted layer proxy PIM |
| CN103475665A (en) * | 2013-09-18 | 2013-12-25 | 杭州华三通信技术有限公司 | Method and device for distinguishing protocol-independent multicast protocol multicast group types |
| CN103516548B (en) * | 2013-09-26 | 2017-02-15 | 杭州华三通信技术有限公司 | RP equipment management method and equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003032299A (en) * | 2001-07-16 | 2003-01-31 | Nippon Telegr & Teleph Corp <Ntt> | Control method of rendezvous point in multicast network |
| CN100499530C (en) * | 2002-05-10 | 2009-06-10 | 华为技术有限公司 | IP group broadcast route forwarding optimizing method |
| CN100499635C (en) * | 2003-08-04 | 2009-06-10 | 华为技术有限公司 | Method for improving robustness of group-playing PIM-SM protocol network |
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2006
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100508467C (en) * | 2007-04-13 | 2009-07-01 | 华为技术有限公司 | Method and route equipment for retransmitted layer proxy PIM |
| CN103475665A (en) * | 2013-09-18 | 2013-12-25 | 杭州华三通信技术有限公司 | Method and device for distinguishing protocol-independent multicast protocol multicast group types |
| CN103475665B (en) * | 2013-09-18 | 2017-07-04 | 新华三技术有限公司 | A kind of method and device for distinguishing Protocol Independent Multicast agreement multicast set type |
| CN103516548B (en) * | 2013-09-26 | 2017-02-15 | 杭州华三通信技术有限公司 | RP equipment management method and equipment |
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