CN105591942B - Method and device for optimizing multicast protocol - Google Patents
Method and device for optimizing multicast protocol Download PDFInfo
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- CN105591942B CN105591942B CN201410571429.6A CN201410571429A CN105591942B CN 105591942 B CN105591942 B CN 105591942B CN 201410571429 A CN201410571429 A CN 201410571429A CN 105591942 B CN105591942 B CN 105591942B
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Abstract
the invention discloses a method for optimizing multicast protocol, which comprises establishing neighbor tracking tables of all members of a downstream router; if receiving the pruning message sent by all the members of the downstream router through the neighbor tracking link, judging all the members to be offline, and deleting the related information of all the members in the neighbor tracking list; and generating a pruning echo message according to the state of the neighbor tracking table, and returning the pruning echo message to the downstream router. The invention also discloses a device for optimizing the multicast protocol. The method for optimizing the multicast protocol improves the network transmission efficiency and lightens the burden of an upstream router.
Description
Technical Field
The present invention relates to the field of network transmission, and in particular, to a method and an apparatus for optimizing a multicast protocol.
background
A PIM (Protocol Independent Multicast) Protocol is a core Protocol of a Multicast service. The system is composed of a group of standard protocols, including PIM-DM (Protocol Independent Multicast DenseMode), PIM-SM (Protocol Independent Multicast sparse Mode), PIM-SSM (Protocol Independent Multicast source specific Mode), and the like. The PIM SM is one of multicast routing protocols, namely, a sparse mode PIM protocol. The method is mainly used in networks with dispersed multicast receivers and complex topology. And establishing a multicast forwarding tree between the multicast data receiver and the multicast data sender so as to correctly forward the multicast data.
multicast Neighbor Tracking (Neighbor Tracking) is a scheme for reducing pruning delay on a link supported by PIM-SM protocol. Enabling this function requires that all multicast routers on the link support neighbor tracking and negotiate through. The upstream router can track and record the joining state of the downstream neighbor, and the downstream router forbids the joining inhibition of the downstream router. However, if this function is implemented according to the RFC (Request For Comments) protocol, some problems arise: since the downstream join suppression is prohibited, every time a downstream joining router leaves, all other joining routers send a new join, and in the case of many downstream joins, the burden is increased for a short time on the downstream link and the processing burden is also increased on the upstream router, and this effect is further increased if there is a device that repeatedly joins and leaves in an unstable situation.
Disclosure of Invention
the invention mainly aims to provide a method and a device for optimizing a multicast protocol, and aims to solve the problems of low network transmission efficiency and excessive load of an upstream router.
in order to achieve the above object, the present invention provides a method for optimizing a multicast protocol, where the method for optimizing a multicast protocol includes the following steps:
Establishing neighbor tracking tables of all members of a downstream router;
if receiving the pruning message sent by all the members of the downstream router through the neighbor tracking link, judging all the members to be offline, and deleting the related information of all the members in the neighbor tracking list;
And generating a pruning echo message according to the state of the neighbor tracking table, and returning the pruning echo message to the downstream router.
Preferably, the step of determining that all members are offline and deleting the related information of all members in the neighbor tracking table further includes, if the pruning message sent by all members of the downstream router through the neighbor tracking link is received:
And switching the state of the current upstream router from the joining state to the non-joining state.
The step of generating a pruning echo message according to the state of the neighbor tracking table and returning the pruning echo message to the downstream router further comprises the following steps:
and judging whether the source IP address of the message to be returned is consistent with the destination upstream field address, and if so, returning the pruned echo message to the downstream router.
preferably, the step of generating a pruned echo message according to the state of the neighbor tracking table and returning the pruned echo message to the downstream router further includes:
and setting an overtime timer, and returning the pruning echo message when the overtime time is up.
the step of generating a pruning echo message according to the state of the neighbor tracking table and returning the pruning echo message to the downstream router further comprises the following steps:
And if an adding message sent by an offline member of the downstream router is received, judging that the member is online, and adding the related information of the member to the neighbor tracking table.
in order to solve the above technical problem, the present invention further provides an apparatus for optimizing a multicast protocol, including:
the establishing module is used for establishing a neighbor tracking table of all members of the downstream router;
A pruning module, configured to determine that all members are offline and delete relevant information of all members in the neighbor tracking table if a pruning message sent by all members of the downstream router through a neighbor tracking link is received;
And the feedback module is used for generating a pruning echo message according to the state of the neighbor tracking table and returning the pruning echo message to the downstream router.
Preferably, the apparatus for optimizing a multicast protocol further comprises:
and the switching module is used for switching the state of the current upstream router from the joining state to the non-joining state.
Preferably, the apparatus for optimizing a multicast protocol further comprises:
And the judging module is used for judging whether the source IP address of the message to be returned is consistent with the destination upstream field address or not, and if so, returning the pruned echo message to the downstream router.
Preferably, the apparatus for optimizing a multicast protocol further comprises:
And the overtime module is used for setting an overtime timer and returning the pruning echo message when the overtime time is up.
Preferably, the apparatus for optimizing a multicast protocol further comprises:
And the joining module is used for judging that the member is on-line after receiving a Join joining message sent by the offline member of the downstream router, adding the related information of the member to the neighbor tracking table, and returning a Prune Echo pruning Echo message to the downstream router.
The method for optimizing the multicast protocol provided by the invention establishes neighbor tracking tables of all members of a downstream router; if receiving the pruning message sent by all the members of the downstream router through the neighbor tracking link, judging all the members to be offline, and deleting the related information of all the members in the neighbor tracking list; and generating a pruning echo message according to the state of the neighbor tracking table, and returning the pruning echo message to the downstream router. The method for optimizing the multicast protocol improves the network transmission efficiency and lightens the burden of an upstream router.
drawings
fig. 1 is a flowchart illustrating a first embodiment of a method for optimizing a multicast protocol according to the present invention;
FIG. 2 is a flowchart illustrating a second embodiment of a method for optimizing a multicast protocol according to the present invention;
FIG. 3 is a flowchart illustrating a method for optimizing a multicast protocol according to a third embodiment of the present invention;
FIG. 4 is a flowchart illustrating a fourth embodiment of a method for optimizing a multicast protocol according to the present invention;
Fig. 5 is a flowchart illustrating a fifth embodiment of the method for optimizing a multicast protocol according to the present invention;
FIG. 6 is a functional block diagram of a first embodiment of an apparatus for optimizing a multicast protocol according to the present invention;
Fig. 7 is a functional block diagram of a second embodiment of the apparatus for optimizing a multicast protocol according to the present invention;
fig. 8 is a functional block diagram of an apparatus for optimizing a multicast protocol according to a third embodiment of the present invention;
fig. 9 is a functional block diagram of an apparatus for optimizing a multicast protocol according to a fourth embodiment of the present invention;
fig. 10 is a functional block diagram of a fifth embodiment of the apparatus for optimizing a multicast protocol according to the present invention;
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The present invention provides a method for optimizing a multicast protocol, referring to fig. 1, fig. 1 is a flowchart illustrating a first embodiment of the method for optimizing a multicast protocol of the present invention, and in the first embodiment, the method for optimizing a multicast protocol includes the following steps:
And S100, establishing neighbor tracking tables of all members of the downstream router.
The multicast protocol optimized device of the upstream router establishes a neighbor-tracking table that includes information about all members of the downstream router, such as A, B, C, D, E and F members.
Step S200, if the pruning message sent by all the members of the downstream router through the neighbor tracking link is received, all the members are judged to be off-line, and the related information of all the members in the neighbor tracking table is deleted.
If the device for optimizing the multicast protocol of the upstream router receives a Prune message sent by all members of the downstream router through a Neighbor Tracking link, judging that all the members are offline, deleting the related information of all the members in a Neighbor Tracking table, and at the moment, the Neighbor Tracking table is a null list.
and step S300, generating a pruning echo message according to the state of the neighbor tracking table, and returning the pruning echo message to the downstream router.
After the device for optimizing the multicast protocol of the upstream router identifies that all members are offline, a Prune Echo pruning Echo message is generated, the Prune Echo pruning Echo message is returned to the downstream router, the offline downstream router members are triggered to rejoin, and if the downstream router detects that the received Prune Echo message is not the Prune Echo pruning Echo message but the Prune Echo messages sent by other downstream routers, the downstream router does not process the Prune pruning Echo message, so that the message processing quantity is reduced, and the burden of a downstream link is relieved.
The method for optimizing the multicast protocol provided by the embodiment reduces the number of message processing; the burden of a downstream link is reduced; therefore, the network transmission efficiency is improved, and the burden of the upstream router is lightened.
Specifically, referring to fig. 2, fig. 2 is a flowchart illustrating a second embodiment of the method for optimizing a multicast protocol according to the present invention, and on the basis of the first embodiment, after the step S200, the method further includes:
step S200A, the state of the current upstream router is switched from the joining state to the non-joining state.
if the device for optimizing the multicast protocol of the upstream router receives the Prune messages sent by all the members of the downstream router, all the members are judged to be off-line, the relevant information of all the members of the neighbor tracking table is deleted, at the moment, the neighbor tracking table is an empty list, and the state is switched from the state of joining in to the state of not joining in No Info.
Further, referring to fig. 3, fig. 3 is a flowchart illustrating a third embodiment of the method for optimizing a multicast protocol according to the present invention, on the basis of the first embodiment, before the step S300, the method includes:
Step S300A, determining whether the source IP address and the destination upstream field address of the message to be returned are consistent, and if the addresses are consistent, returning the pruned echo message to the downstream router.
The device of the upstream router for optimizing the multicast protocol judges whether the source IP address of the message to be returned is consistent with the destination upstream Up-Stream field address, if the addresses are consistent, the message is judged to be a Prune Echo message, and the message is returned to the downstream router; if not, the message is judged not to be the Prune Echo back display message and is not returned to the downstream router, so that the message processing amount is reduced.
Further, referring to fig. 4, fig. 4 is a flowchart illustrating a fourth embodiment of the method for optimizing a multicast protocol according to the present invention, and on the basis of the first embodiment, before the step S300, the method further includes:
and step S300B, setting an overtime timer, and returning the pruning echo message when the overtime time is up.
the device for optimizing the multicast protocol of the upstream router sets an overtime timer, and returns a Prune Echo pruning Echo message when the set overtime is up, thereby avoiding the congestion of a routing link in a short time. The set time of the overtime timer can be freely adjusted according to the actual message processing time.
Further, referring to fig. 4, fig. 4 is a flowchart illustrating a fourth embodiment of the method for optimizing a multicast protocol according to the present invention, and on the basis of the first embodiment, after the step S300, the method further includes:
Step S400, if an adding message sent by an offline member of a downstream router is received, judging that the member is online, and adding the related information of the member to the neighbor tracking table.
The off-line member of the downstream router sends a Join message after receiving the Prune Echo message sent by the upstream router, the device for optimizing the multicast protocol of the upstream router judges that the off-line member is on-line again after receiving the Join message sent by the off-line member of the downstream router, thereby increasing the related information of the member to the neighbor tracking table, and the downstream router does not process the received Prune Echo message but the Prune Echo message sent by other downstream routers, thereby reducing the number of message processing and lightening the burden of a downstream link.
further, the present invention also provides an apparatus for optimizing a multicast protocol, referring to fig. 6, fig. 6 is a schematic diagram of functional modules of a first embodiment of the apparatus for optimizing a multicast protocol, in the first embodiment, the apparatus for optimizing a multicast protocol includes:
the establishing module 10 is used for establishing a neighbor tracking table of all members of a downstream router;
A pruning module 20, configured to determine that one member of the downstream router is offline and delete the relevant information of the member in the neighbor tracking table if the Prune packet sent by the member through the neighbor tracking link is received;
and the feedback module 30 is configured to generate a pruning echo message according to the state of the neighbor tracking table, and return the pruning echo message to the downstream router.
the setup module 10 of the multicast protocol optimized apparatus of the upstream router sets up a neighbor-tracking table that includes information about all members of the downstream router, such as A, B, C, D, E and F members.
If the pruning module 20 of the apparatus for optimizing a multicast protocol of an upstream router receives a Prune pruning message sent by all members of a downstream router through a Neighbor Tracking link, it determines that all members are offline, and deletes relevant information of all members in a Neighbor Tracking table, where the Neighbor Tracking table is an empty list.
after recognizing that all members are offline, the feedback module 30 of the device for optimizing a multicast protocol of the upstream router generates a Prune Echo pruning Echo message, returns the Prune Echo pruning Echo message to the downstream router, and triggers offline downstream router members to rejoin, and if the downstream router detects that the received Prune Echo pruning Echo message is not the Prune Echo pruning Echo message but the Prune pruning messages sent by other downstream routers, the downstream router does not process the Prune pruning Echo message, so that the message processing quantity is reduced, and the burden of a downstream link is reduced.
The device for optimizing the multicast protocol provided by the embodiment reduces the number of message processing; the burden of a downstream link is reduced; therefore, the network transmission efficiency is improved, and the burden of the upstream router is lightened.
specifically, referring to fig. 7, the apparatus for optimizing a multicast protocol provided in this embodiment further includes:
and a switching module 40, configured to switch the state of the current upstream router from the joining state to the non-joining state.
if the switching module 40 of the device for optimizing the multicast protocol of the upstream router receives the Prune messages sent by all the members of the downstream router, the switching module judges that all the members are offline, deletes the related information of all the members of the neighbor tracking table, and at this time, the neighbor tracking table is an empty list and is switched from the Join state to the No Info state.
Specifically, referring to fig. 8, the apparatus for optimizing a multicast protocol provided in this embodiment further includes:
and the judging module 50 is configured to judge whether the source IP address and the destination upstream field address of the to-be-returned packet are consistent, and if the source IP address and the destination upstream field address are consistent, return the pruned echo packet to the downstream router.
The judging module 50 of the device for optimizing the multicast protocol of the upstream router judges whether the source IP address of the message to be returned is consistent with the destination upstream Up-Stream field address, if the addresses are consistent, the message is judged to be a Prune Echo message, and the message is returned to the downstream router; if not, the message is judged not to be a prune echo message and is not returned to the downstream router, so that the message processing amount is reduced.
Preferably, referring to fig. 9, the apparatus for optimizing a multicast protocol provided in this embodiment further includes:
And the timeout module 60 is configured to set a timeout timer, and return a Prune Echo pruning Echo message when the timeout time is up.
the timeout module 60 of the device for optimizing the multicast protocol of the upstream router sets a timeout timer, and returns a Prune Echo pruning Echo message when the set timeout time is up, thereby avoiding the congestion of the routing link in a short time. The set time of the overtime timer can be freely adjusted according to the actual message processing time.
Preferably, referring to fig. 10, the apparatus for optimizing a multicast protocol provided in this embodiment further includes:
The joining module 70 is configured to, after receiving a joining message sent by a downstream router offline member, determine that the member is online, and add relevant information of the member to the neighbor tracking table.
the off-line member of the downstream router sends a Join message after receiving the Prune Echo message sent by the upstream router, the Join module 70 of the device for optimizing the multicast protocol of the upstream router judges that the off-line member is on-line again after receiving the Join message sent by the off-line member of the downstream router, thereby increasing the related information of the member to the neighbor tracking table, and the downstream router does not process the Prune Echo message if detecting that the received Join message is not the Prune Echo message but the Prune Echo message sent by other downstream routers, thereby reducing the number of message processing and lightening the burden of a downstream link.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for optimizing a multicast protocol, the method comprising the steps of: establishing neighbor tracking tables of all members of a downstream router;
if receiving the pruning message sent by all the members of the downstream router through the neighbor tracking link, judging all the members to be offline, and deleting the related information of all the members in the neighbor tracking list;
and generating a pruning echo message according to the state of the neighbor tracking table, and returning the pruning echo message to the downstream router to trigger the downstream router to rejoin, wherein the downstream router does not process the pruning messages of other downstream routers.
2. The method according to claim 1, wherein the step of determining all members are offline and deleting the related information of all members in the neighbor tracking table further comprises, if the prune packet sent by all members of the downstream router through the neighbor tracking link is received:
And switching the state of the current upstream router from the joining state to the non-joining state.
3. The method of claim 1, wherein the step of generating a pruned echo message according to the state of the neighbor tracking table and returning the pruned echo message to the downstream router further comprises:
and judging whether the source IP address of the message to be returned is consistent with the destination upstream field address, and if so, returning the pruned echo message to the downstream router.
4. The method of claim 1, wherein the step of generating a pruned echo message according to the state of the neighbor tracking table and returning the pruned echo message to the downstream router further comprises:
and setting an overtime timer, and returning the pruning echo message when the overtime time is up.
5. The method according to any of claims 1 to 4, wherein the step of generating a pruned echo message according to the state of the neighbor tracking table and returning it to the downstream router further comprises:
and if an adding message sent by an offline member of the downstream router is received, judging that the member is online, and adding the related information of the member to the neighbor tracking table.
6. an apparatus for optimizing a multicast protocol, the apparatus comprising: the establishing module is used for establishing a neighbor tracking table of all members of the downstream router;
A pruning module, configured to determine that all members are offline and delete relevant information of all members in the neighbor tracking table if a pruning message sent by all members of the downstream router through a neighbor tracking link is received;
And the feedback module is used for generating a pruning echo message according to the state of the neighbor tracking table, and returning the pruning echo message to the downstream router to trigger the downstream router to rejoin, wherein the downstream router does not process the pruning messages of other downstream routers.
7. the apparatus for optimizing a multicast protocol according to claim 6, wherein the switching module of the apparatus for optimizing a multicast protocol is configured to switch the current state of the upstream router from a joined state to a non-joined state.
8. the apparatus for optimizing a multicast protocol according to claim 6, wherein the apparatus for optimizing a multicast protocol further comprises:
And the judging module is used for judging whether the source IP address of the message to be returned is consistent with the destination upstream field address, and if so, returning the pruning echo message to the downstream router.
9. the apparatus for optimizing a multicast protocol according to claim 6, wherein the apparatus for optimizing a multicast protocol further comprises:
and the overtime module is used for setting an overtime timer and returning the pruning echo message when the overtime time is up.
10. The apparatus for optimizing a multicast protocol according to any one of claims 6 to 9, wherein the apparatus for optimizing a multicast protocol further comprises:
And the joining module is used for judging that the member is on-line and adding the related information of the member to the neighbor tracking table after receiving a joining message sent by the off-line member of the downstream router.
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| CN201410571429.6A CN105591942B (en) | 2014-10-23 | 2014-10-23 | Method and device for optimizing multicast protocol |
| PCT/CN2015/086234 WO2016062150A1 (en) | 2014-10-23 | 2015-08-06 | Multicast protocol optimization method and device |
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| CN201410571429.6A CN105591942B (en) | 2014-10-23 | 2014-10-23 | Method and device for optimizing multicast protocol |
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| CN101167311A (en) * | 2005-04-25 | 2008-04-23 | 汤姆森特许公司 | Multicast route protocol in gridding network |
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| CN105591942A (en) | 2016-05-18 |
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