CN103475665B - A kind of method and device for distinguishing Protocol Independent Multicast agreement multicast set type - Google Patents
A kind of method and device for distinguishing Protocol Independent Multicast agreement multicast set type Download PDFInfo
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- CN103475665B CN103475665B CN201310432319.7A CN201310432319A CN103475665B CN 103475665 B CN103475665 B CN 103475665B CN 201310432319 A CN201310432319 A CN 201310432319A CN 103475665 B CN103475665 B CN 103475665B
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Abstract
The present invention provides a kind of method and device for distinguishing Protocol Independent Multicast agreement multicast set type, and Multicast Routing BSR messages include the first identification field to represent the multicast group prefix of Protocol Independent Multicast-Sparse Mode agreement PIM SM or bidirectional protocol independent multicast agreement BIDIR PIM.Methods described includes step：The multicast group range of operation special source protocol independent multicast agreement PIM SSM and Protocol Independent Multicast-Dense Mode agreement PIM DM is preserved according to user configuring instruction；Generation BSR messages, the BSR messages include the first indication field, or represent the second identification field of the multicast group prefix of PIM SSM, or the 3rd identification field for representing the multicast group prefix of PIM DM；The BSR messages are sent to PIM equipment.The present invention can effectively distinguish four kinds of PIM agreements, and be easily configured, and expand and change, and will not bring the diffusion of flux of multicast.
Description
Technical field
It is unrelated the present invention relates to the technical field of Protocol Independent Multicast agreement PIM agreements, more particularly to a kind of differentiation agreement
The method and device of multicast protocol multicast set type.
Background technology
PIM agreements are the most widely used multicast routing protocols, and it provides Protocol Independent Multicast-Sparse Mode agreement
PIM-SM, bidirectional protocol independent multicast agreement BIDIR-PIM, Protocol Independent Multicast-Dense Mode agreement PIM-DM and source are specific
Tetra- kinds of agreements of Protocol Independent Multicast agreement PIM-SSM, are respectively suitable for different application scenarios.
The content of the invention
In view of this, the present invention provides a kind of method and device for distinguishing Protocol Independent Multicast agreement multicast set type, energy
It is enough effectively to distinguish four kinds of PIM agreements, and be easily configured, expand and change, the diffusion of flux of multicast will not be brought.
A kind of method for distinguishing Protocol Independent Multicast agreement multicast set type, is applied to multicast routing protocol BSR equipment, group
Broadcasting route BSR messages includes the first identification field to represent Protocol Independent Multicast-Sparse Mode agreement PIM-SM or bidirectional protocol
The multicast group prefix of independent multicast agreement BIDIR-PIM.Methods described includes step：
According to user configuring instruction preserve operation special source protocol independent multicast agreement PIM-SSM and dense mode agreement without
Close the multicast group range of multicast protocol PIM-DM.
Generation BSR messages, the BSR messages include the first indication field, or the multicast group prefix for representing PIM-SSM
Second identification field, or represent the 3rd identification field of the multicast group prefix of PIM-DM.
The BSR messages are sent to PIM equipment.
Further, second identification field or the 3rd identification field are arranged on the group address of the BSR messages
The 2nd Reserved field of byte in the encapsulation format Encoded-Group format of Group Address；If described
Second identification field represents that the multicast group prefix is PIM-SSM patterns for S；Or if the 3rd identification field is D tables
Show that the multicast group prefix is PIM-DM patterns.
Further, PIM-SSM patterns or during PIM-DM patterns, the convergent point RP numbers of the BSR messages are extended this as
First predetermined value, converges dot address RP Address and extends this as second predetermined value, and order of priority Priority fields extend this as the
Three predetermined values, the Holdtimm that holds time uses Configuration Values.
A kind of method for distinguishing Protocol Independent Multicast agreement multicast set type, is applied to Protocol Independent Multicast PIM equipment.Institute
Stating method includes step：
BSR messages are received, and learns BSR messages.
The first identification field or the second identification field or the 3rd identification field in BSR messages determine multicast group
The multicast protocol type of operation.
For two kinds of agreements of PIM-SM and BIDIR-PIM, learn RP；Safeguarded for two kinds of agreements of PIM-DM and PIM-SSM
Multicast group is configured.
Further, second identification field or the 3rd identification field are arranged on the group address of the BSR messages
The 2nd Reserved field of byte in the encapsulation format Encoded-Group format of Group Address.
The first identification field or the second identification field or the 3rd identification field in the message according to BSR determine group
A group multicast protocol type for operation is broadcast to further include：
It is S if there is second identification field, represents that the multicast group prefix is PIM-SSM patterns；If there is
3rd identification field is D, represents that the multicast group prefix is PIM-DM patterns.
A kind of device for distinguishing Protocol Independent Multicast agreement multicast set type, is applied to multicast routing protocol BSR equipment, group
Broadcasting route BSR messages includes the first identification field to represent Protocol Independent Multicast-Sparse Mode agreement PIM-SM or bidirectional protocol
The multicast group prefix of independent multicast agreement BIDIR-PIM.Described device includes：
Range setting module, for preserving operation special source protocol independent multicast agreement PIM- according to user configuring instruction
The multicast group range of SSM and Protocol Independent Multicast-Dense Mode agreement PIM-DM.
Message generation unit, for generating BSR messages, the BSR messages include the first indication field, or represent PIM-
Second identification field of SSM multicast group prefixes, or represent the 3rd identification field of PIM-DM multicast group prefixes.
Packet sending unit, for the BSR messages to be sent into PIM equipment.
Further, second identification field or the 3rd identification field are arranged on the group address of the BSR messages
The 2nd Reserved field of byte in the encapsulation format Encoded-Group format of Group Address；If described
Second identification field represents that the multicast group prefix is PIM-SSM patterns for S；Or if the 3rd identification field is D tables
Show that the multicast group prefix is PIM-DM patterns.
Further, PIM-SSM patterns or during PIM-DM patterns, the convergent point RP numbers of the BSR messages are extended this as
First predetermined value, converges dot address RP Address and extends this as second predetermined value, and order of priority Priority fields extend this as the
Three predetermined values, the Holdtimm that holds time uses Configuration Values.
A kind of device for distinguishing Protocol Independent Multicast agreement multicast set type, is applied to Protocol Independent Multicast PIM equipment.Institute
Stating device includes：
Message receiving unit, for receiving BSR messages, and learns BSR messages.
Agreement discrimination unit, for the first identification field in BSR messages or the second identification field or the 3rd
Identification field determines the multicast protocol type of multicast group operation.
Subsequent operation unit, for for two kinds of agreements of PIM-SM and BIDIR-PIM, learning RP；For PIM-DM and
Two kinds of agreements of PIM-SSM safeguard that multicast group is configured.
Further, second identification field or the 3rd identification field are arranged on the group address of the BSR messages
The 2nd Reserved field of byte in the encapsulation format Encoded-Group format of Group Address.
The first identification field or the second identification field or the 3rd identification field in the message according to BSR determine group
A group multicast protocol type for operation is broadcast to further include：
If second identification field represents that the multicast group prefix is PIM-SSM patterns for S；Or if described
Three identification fields represent that the multicast group prefix is PIM-DM patterns for D.
Prior art of the present invention be distinguished using BSR equipment and BSR messages multicast group operation PIM-SM and
Two kinds of PIM agreements of BIDIR-PIM, but cannot be distinguished by two kinds of PIM agreements of PIM-DM and PIM-SSM of multicast group operation.This hair
Bright two kinds of PIM of PIM-DM and PIM-SSM that multicast group operation is distinguished further with BSR equipment and the BSR messages of modification
Agreement.Such that it is able to effectively distinguish four kinds of PIM agreements, and it is easily configured, expands and change, the expansion of flux of multicast will not be brought
Dissipate.
Brief description of the drawings
Fig. 1 is a structure chart for specific embodiment device of the invention；
Fig. 2 is the corresponding method flow diagram of specific embodiment in Fig. 1 of the present invention；
The BSR messages of Fig. 3 prior arts；
The Encoded-Group format of the BSR messages of Fig. 4 prior arts；
Fig. 5 is BSR messages of the present invention；
Fig. 6 is the Encoded-Group format of BSR messages of the present invention；
Fig. 7 is the structure chart of another specific embodiment device of the invention；
Fig. 8 is the corresponding method flow diagram of specific embodiment in Fig. 5 of the present invention.
Specific embodiment
In PIM agreements, for the multicast group address for giving, it is thus necessary to determine that multicast group runs any PIM agreements.It is existing
Multicast routing protocol BSR（BootStrap Router）For the collection of the RP information of network, its issue PIM-SM and
The RP of BIDIR-PIM, therefore two kinds of PIM agreements of PIM-SM and BIDIR-PIM of multicast group operation can be distinguished.But cannot area
Two kinds of PIM agreements of PIM-DM and PIM-SSM for being divided to multicast group to run, it is therefore desirable to configure PIM-DM on all of network equipment
With the multicast group range of PIM-SSM agreements, configuration amount is big, easily malfunctions and be difficult to expand and change.
Another prior art is that the multicast group that will be not mapped into RP all regards PIM-DM protocol processes, but is worked as
The RP of PIM-SM and BIDIR-PIM agreements loses temporarily when, the multicast group that loss RP is serviced is regarded as operation by prior art
PIM-DM agreements.And PIM-DM assumes that each subnet in network has at least one multicast member, therefore multicast packet
To be spread（Flooding）All nodes in network.The multicast group for losing RP services is identified as operation PIM-DM associations
View, so that the flux of multicast of above-mentioned multicast group can be diffused into all of PIM routers.
In order to realize the object of the invention, the present invention distinguishes multicast group operation further with BSR equipment and BSR messages
Two kinds of PIM agreements of PIM-DM and PIM-SSM.Because prior art can be distinguished by BSR equipment and BSR messages
Two kinds of PIM agreements of PIM-SM and BIDIR-PIM of multicast group operation.Therefore, the present invention can utilize BSR equipment and modification
BSR messages effectively distinguish four kinds of PIM agreements, and are easily configured, and expand and change, and will not bring the diffusion of flux of multicast.
Referring to Fig. 1, the present invention provides a kind of device of the Protocol Independent Multicast type for distinguishing multicast group operation, is applied to group
Routing Protocol BSR equipment is broadcast, BSR messages include the first identification field to represent Protocol Independent Multicast-Sparse Mode agreement PIM-SM
Or the multicast group prefix of bidirectional protocol Protocol Independent Multicast agreement BIDIR-PIM.The basic hardware framework bag of the BSR equipment
Include CPU, internal memory, input input equipment, nonvolatile memory（Such as hard disk）And other hardware.Apparatus of the present invention are in logic
On include：
Range setting module, for preserving operation special source protocol independent multicast agreement PIM- according to user configuring instruction
The multicast group range of SSM and Protocol Independent Multicast-Dense Mode agreement PIM-DM.
Message generation unit, for generating BSR messages, the BSR messages include the first indication field, or represent PIM-
Second identification field of SSM multicast group prefixes, or represent the 3rd identification field of PIM-DM multicast group prefixes.
Packet sending unit, for the BSR messages to be sent into PIM equipment.
Referring to Fig. 2, specifically, the present invention also corresponds to said apparatus and provides a kind of unrelated group of agreement for distinguishing multicast group operation
The method for broadcasting type, is applied to multicast routing protocol BSR equipment, and BSR messages include the first identification field to represent sparse mode
The multicast group prefix of Protocol Independent Multicast agreement PIM-SM or bidirectional protocol Protocol Independent Multicast agreement BIDIR-PIM.It is described
Method includes step：
201st, operation source specific multicast agreement PIM-SSM and unrelated group of dense mode agreement are preserved according to user configuring instruction
Broadcast the multicast group range of agreement PIM-DM.
202nd, BSR messages are generated, before the BSR messages include the first indication field, or the multicast group of expression PIM-SSM
The second identification field sewed, or represent the 3rd identification field of the multicast group prefix of PIM-DM.
203rd, the BSR messages are sent to PIM equipment.
Referring to Fig. 3 and Fig. 4, the standard BSR messages of prior art issue the RP information of PIM-SM and BIDIR-PIM.BSR is reported
The encapsulation format Encoded-Group format of the group address Group Address of text include the first identification field B to represent
The multicast group prefix of Protocol Independent Multicast-Sparse Mode agreement PIM-SM or bidirectional protocol independent multicast agreement BIDIR-PIM.
Otherwise it is PIM-SM patterns if B is that 1 expression multicast group prefix is BIDIR-PIM patterns.
It is BSR messages of the invention referring to Fig. 5.Although PIM-SSM and PIM-DM agreements do not need RP information, can
To borrow the multicast group prefix that BSR messages issue PIM-SSM and PIM-DM.The present invention due to PIM-SSM and PIM-DM agreements not
RP is needed, therefore the fixation of RP numbers is extended this as 1 or 0.RP Address are extended this as 0 by the present invention, to ignore the RP
Address fields.Priority fields are also generally extended this as 0, that is, is ignored.But, before generally there are multiple multicast groups
Sew, prior art selection mask-length multicast group prefix most long, when also still suffering from multiple multicast group prefixes, it is also possible to utilize
Priority fields, in the case of the mask-length identical of the multiple multicast group prefixes for existing, selecting priority highest group
Broadcast a group prefix.Holdtime uses Configuration Values, and the Configuration Values are to specify ageing time.
It is Encoded-Group format of the invention, compared with the BSR messages of the standard in technology referring to Fig. 6
Encoded-Group format it is the same, if in multicast group exist the first identification field B, and B be 1 expression the multicast group
Prefix is BIDIR-PIM patterns, is PIM-SM patterns if B is not 1.The 2nd of the Encoded-Group format
, there is the second identification field in the Reserved fields of individual byte, and the second identification field is S, then it represents that operation PIM-SSM agreements
Multicast group prefix；Or there is the 3rd identification field, and the 3rd identification field is D, then it represents that the group of operation PIM-DM agreements
Broadcast a group prefix.Certainly, because the second identification field and the 3rd identification field do not occur simultaneously, can also be by the second identification field
With the same position that the 3rd identification field is arranged on Reserved fields.
Referring to Fig. 7, the present invention also provides the device of another Protocol Independent Multicast type for distinguishing multicast group operation, should
For PIM equipment.The basic hardware framework of the PIM equipment includes CPU, internal memory, input input equipment, nonvolatile memory
（Such as hard disk）And other hardware.Apparatus of the present invention logically include：
Message receiving unit, for receiving BSR messages, and learns BSR messages.
Agreement discrimination unit, for the first identification field in BSR messages or the second identification field or the 3rd
Identification field determines the multicast protocol type of multicast group operation.
Subsequent operation unit, for for two kinds of agreements of PIM-SM and BIDIR-PIM, learning RP；For PIM-DM and
Two kinds of agreements of PIM-SSM safeguard that multicast group is configured.
Referring to Fig. 8, specifically, the present invention also corresponds to said apparatus and provides a kind of unrelated group of agreement for distinguishing multicast group operation
The method for broadcasting type, is applied to Protocol Independent Multicast PIM equipment.Methods described includes step：
801st, BSR messages are received, and learns BSR messages.
802nd, the first identification field or the second identification field or the 3rd identification field in BSR messages determine group
Broadcast a group multicast protocol type for operation.
803rd, for two kinds of agreements of PIM-SM and BIDIR-PIM, RP is learnt；For two kinds of agreements of PIM-DM and PIM-SSM
Safeguard that multicast group is configured.
Referring to Fig. 6, second identification field or the 3rd identification field in step 802 are arranged on the BSR messages
Group address Group Address encapsulation format Encoded-Group format in the 2nd Reserved field of byte.
The step 803 includes：
Second identification field represents that the multicast group prefix is PIM-SSM patterns for S；Or the 3rd identifier word
Section represents that the multicast group prefix is PIM-DM patterns for D.Or in the presence of the first identification field be 1 expression the multicast group prefix be
BIDIR-PIM patterns, not for 1 is expressed as PIM-SM patterns.
For the multicast group for giving, mask multicast group prefix most long is selected from above-mentioned prefix such as prior art, it
Afterwards according to the first identification field（B）Or second identification field（S）Or the 3rd identification field（D）Determine multicast group operation
Protocol type.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (10)
1. a kind of method for distinguishing Protocol Independent Multicast agreement multicast set type, is applied to multicast routing protocol BSR equipment, BSR
Message includes the first identification field, and first identification field is used for representing Protocol Independent Multicast-Sparse Mode agreement PIM-SM's
The multicast group prefix of multicast group prefix or bidirectional protocol independent multicast agreement BIDIR-PIM, it is characterised in that methods described bag
Include step：
Operation special source protocol independent multicast agreement PIM-SSM and unrelated group of dense mode agreement are preserved according to user configuring instruction
Broadcast the multicast group range of agreement PIM-DM；
Generation BSR messages, the BSR messages also include the second identification field of the multicast group prefix for representing PIM-SSM, Huo Zhebiao
Show the 3rd identification field of the multicast group prefix of PIM-DM；
The BSR messages are sent to PIM equipment.
2. the method for claim 1, it is characterised in that second identification field or the 3rd identification field are arranged on
2nd byte in the encapsulation format Encoded-Group format of the group address Group Address of the BSR messages
Reserved fields；If second identification field represents that the multicast group prefix is PIM-SSM patterns for S；Or if
3rd identification field represents that the multicast group prefix is PIM-DM patterns for D.
3. method as claimed in claim 2, it is characterised in that when PIM-SSM patterns or PIM-DM patterns, the BSR reports
The convergent point RP numbers of text extend this as first predetermined value, converge dot address RPAddress and extend this as second predetermined value, order of priority
Priority fields extend this as third predetermined value, and the Holdtimm that holds time uses Configuration Values.
4. a kind of method for distinguishing Protocol Independent Multicast agreement multicast set type, is applied to Protocol Independent Multicast PIM equipment, and it is special
Levy and be, methods described includes step：
Multicast routing protocol BSR messages are received, and learns BSR messages；
The first identification field and the second identification field in BSR messages, or the first identification field and the 3rd mark
Field, determines the multicast protocol type of multicast group operation；
For two kinds of associations of Protocol Independent Multicast-Sparse Mode agreement PIM-SM and bidirectional protocol independent multicast agreement BIDIR-PIM
View, study convergent point RP；For Protocol Independent Multicast-Dense Mode agreement PIM-DM and special source protocol independent multicast agreement
Two kinds of agreements of PIM-SSM safeguard that multicast group is configured；
Wherein, first identification field is used for representing the multicast group prefix of PIM-SM or the multicast group prefix of BIDIR-PIM；
Second identification field is used for representing the multicast group prefix of PIM-SSM；3rd identification field is used for representing PIM-DM's
Multicast group prefix.
5. method as claimed in claim 4, it is characterised in that second identification field or the 3rd identification field are arranged on
2nd byte in the encapsulation format Encoded-Group format of the group address Group Address of the BSR messages
Reserved fields；
The first identification field and the second identification field in the message according to BSR, or the first identification field and the 3rd
Identification field, determines that the multicast protocol type of multicast group operation is further included：
It is S if there is second identification field, represents that multicast group prefix is PIM-SSM patterns；If there is the described 3rd
Identification field is D, represents that the multicast group prefix is PIM-DM patterns.
6. a kind of device for distinguishing Protocol Independent Multicast agreement multicast set type, is applied to multicast routing protocol BSR equipment, BSR
Message includes the first identification field, and first identification field is used for representing Protocol Independent Multicast-Sparse Mode agreement PIM-SM's
The multicast group prefix of multicast group prefix or bidirectional protocol independent multicast agreement BIDIR-PIM, it is characterised in that described device bag
Include：
Range setting module, for according to user configuring instruction preserve operation special source protocol independent multicast agreement PIM-SSM and
The multicast group range of Protocol Independent Multicast-Dense Mode agreement PIM-DM；
Message generation unit, for generating BSR messages, the BSR messages also include representing the second of PIM-SSM multicast group prefixes
Identification field, or represent the 3rd identification field of PIM-DM multicast group prefixes；
Packet sending unit, for the BSR messages to be sent into PIM equipment.
7. device as claimed in claim 6, it is characterised in that second identification field or the 3rd identification field are arranged on
2nd byte in the encapsulation format Encoded-Group format of the group address Group Address of the BSR messages
Reserved fields；If second identification field represents that the multicast group prefix is PIM-SSM patterns for S；Or if
3rd identification field represents that the multicast group prefix is PIM-DM patterns for D.
8. device as claimed in claim 7, it is characterised in that when PIM-SSM patterns or PIM-DM patterns, the BSR reports
The convergent point RP numbers of text extend this as first predetermined value, converge dot address RPAddress and extend this as second predetermined value, order of priority
Priority fields extend this as third predetermined value, and the Holdtimm that holds time uses Configuration Values.
9. a kind of device for distinguishing Protocol Independent Multicast agreement multicast set type, is applied to Protocol Independent Multicast PIM equipment, and it is special
Levy and be, described device includes：
Message receiving unit, for receiving multicast routing protocol BSR messages, and learns BSR messages；
Agreement discrimination unit, for the first identification field and the second identification field in BSR messages, or, the first mark
Character learning section and the 3rd identification field, determine the multicast protocol type of multicast group operation；
Subsequent operation unit, for for Protocol Independent Multicast-Sparse Mode agreement PIM-SM and bidirectional protocol independent multicast agreement
Two kinds of agreements of BIDIR-PIM, study convergent point RP；For Protocol Independent Multicast-Dense Mode agreement PIM-DM and special source protocol
Two kinds of agreements of independent multicast agreement PIM-SSM safeguard that multicast group is configured；
Wherein, first identification field is used for representing the multicast group prefix of PIM-SM or the multicast group prefix of BIDIR-PIM；
Second identification field is used for representing the multicast group prefix of PIM-SSM；3rd identification field is used for representing PIM-DM's
Multicast group prefix.
10. device as claimed in claim 9, it is characterised in that second identification field or the 3rd identification field are set
The 2nd byte in the encapsulation format Encoded-Group format of the group address Group Address of the BSR messages
Reserved fields；
The first identification field and the second identification field in the message according to BSR, or the first identification field and the 3rd
Identification field, determines that the multicast protocol type of multicast group operation is further included：
If second identification field represents that multicast group prefix is PIM-SSM patterns for S；Or if the 3rd identifier word
Section represents that the multicast group prefix is PIM-DM patterns for D.
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| US9660898B2 (en) * | 2014-12-19 | 2017-05-23 | Juniper Networks, Inc. | Enhanced protocol independent multicast source registration over a reliable transport |
| CN111245731B (en) * | 2020-02-24 | 2021-11-23 | 重庆金美通信有限责任公司 | Improved method for protocol independent multicast signaling to pass through BIER |
| CN111431929B (en) * | 2020-04-08 | 2020-11-13 | 清华大学 | Method and system for constructing multi-protocol distinguishing flow table of software defined network |
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