CN100542142C - Change the method and apparatus of three-layer network appliance Interface status - Google Patents
Change the method and apparatus of three-layer network appliance Interface status Download PDFInfo
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- CN100542142C CN100542142C CNB2007100903431A CN200710090343A CN100542142C CN 100542142 C CN100542142 C CN 100542142C CN B2007100903431 A CNB2007100903431 A CN B2007100903431A CN 200710090343 A CN200710090343 A CN 200710090343A CN 100542142 C CN100542142 C CN 100542142C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
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Abstract
The present invention relates to network technology, a kind of method and apparatus that changes the three-layer network appliance Interface status is provided, this method is specially: the accepting state refresh message, if outgoing interface is in and stops forwarding data mode during to described state refresh forwards, and described outgoing interface be in the duration that stops forwarding data mode less than described state refresh message send duration at interval preset multiple the time, described outgoing interface is in the duration that stops forwarding data mode is updated to the multiple that presets that described state refresh message sends the interval duration, when described outgoing interface is in duration after the duration that stops forwarding data mode reaches renewal, change described outgoing interface into the forwarding data mode by stopping forwarding data mode.Utilize the present invention, realized that when change state refresh message sent at interval, the list item of outgoing interface tabulation made a mistake, cause that data arrive the node that does not have demand data in the network, the problem of waste network bandwidth resources.
Description
Technical field
The present invention relates to networking technology area, relate in particular to a kind of method and apparatus that changes the three-layer network appliance Interface status.
Background technology
Along with the continuous development of network technology, the IP transmission has obtained increasing application.Wherein, multicasting technology demonstrates its distinctive advantage as a kind of effective I P transmission solution aspect a lot.PIM-DM (Protocol Independent Multicast-Dense Mode, Protocol Independent Multicast-dense mode) belongs to the multicast routing protocol of dense mode.Under this network environment, the member of multicast group is relatively intensive, and PIM-DM supposes that each subnet in each network all exists at least one to the interested receiving station of multicast source, thus multicast packet be diffused in the network have a few.
The course of work of PIM-DM may be summarized to be: neighbours find that in PIM-DM, multicast router need use Hello message to find neighbours, and the maintenance of neighbor relation; Make up the SPT tree, the process that makes up the STP tree just spreads or beta pruning (Flooding﹠amp; Prune), forming one is the multicast transmit tree of root with the multicast source; Grafting (Graft), in the time need being returned to forwarding state by the downstream node of beta pruning, this node uses grafting message informing upstream node, and hop-by-hop upstream sends, and upstream router is received grafting message, recovers to transmit data traffic; Rpf check when packet arrives, arrives the correctness inspection in path; The transmission that repeats of identical message can appear in Assert mechanism in shared network, select a unique forwarding person by Assert mechanism, is responsible for transmitting data by the winner, and other unelected routers are then cut corresponding interface to forbid multicast data forwarding; State refresh mechanism (State Refresh Mechanism), state refresh message is produced by first hop router, be diffused into the whole network, after router receives state refresh message, reduce flood of data and follow-up beta pruning message, refresh the overtime timer in the protocol state machine, and upgrade the beta pruning state of outgoing interface and respond change in topology fast, utilize state refresh mechanism periodically to be diffused into the whole network, replace periodically spreading beta pruning.
In the prior art, the transmission that repeats of identical message can appear in shared network, for example, on router-A and router B, receive multicast packet from incoming interface respectively, these two routers can elect a unique data forwarding person router-A by Assert mechanism, be referred to as the winner, router B is referred to as the losing candidate, router B will delete outgoing interface from the list item outgoing interface, can send Prune message to router-A simultaneously, the outgoing interface of router-A is received Prune message, because the downstream does not have Data Receiving person, the outgoing interface of final route device A is by deletion from outgoing interface tabulation, and outgoing interface enters the Prune state, and the time-out time of the Prune timer of router-A is set to receive the Hold Time field in the Prune message that router B sends, such as being set to 180 seconds, the time-out time of the Prune timer of described router-A is the time that router is in the Prune state.In the upstream, because the periodic transmit status refresh message of first hop router, after router-A is received, the Prune timer of meeting replacement self outgoing interface, the timeout interval of router-A outgoing interface Prune timer remains unchanged, and add that in the state refresh message of receiving Prune indicates, send to outgoing interface, the outgoing interface of router B is received this message, because this message that to be the winner send, can upgrade the Assert timer expiry time interval and be 3 times of time interval in the state refresh message packet.
But, in realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: if on first hop router, the user changes to the transmission time interval of state refresh message bigger, such as changing 200 seconds into, like this at the overtime timer of just resetting during at the forwarding state refresh message of the Prune timer on the router-A outgoing interface, and the outgoing interface of router B receive Assert timer after the state refresh message be set to 200 3 times promptly 600 seconds, the outgoing interface of router-A Prune timer expiry after 180 seconds like this, the outgoing interface of router-A adds the outgoing interface tabulation of list item again, upwards send Graft message simultaneously, and hop-by-hop upwards sends to first hop router, multicast transmit tree rebulids, do not have under real Data Receiving person's situation in the downstream, multicast routing table item mistake, and can not revert to correct status, the flux of multicast data can send to the router-A and the shared network segment, have caused the significant wastage of network broadband.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of method and apparatus that changes the three-layer network appliance Interface status, can be when change state refresh message sends the interval duration, the corresponding outgoing interface that upgrades is in the duration that stops forwarding data mode, the broadband resource waste of avoiding the outgoing interface tabulation to make a mistake causing.
For solving the problems of the technologies described above, the embodiment of the invention is achieved through the following technical solutions:
The embodiment of the invention provides a kind of method that changes the three-layer network appliance Interface status on the one hand, comprising:
The accepting state refresh message if outgoing interface is in and stops forwarding data mode during to described state refresh forwards, then obtains described outgoing interface and is in the duration and the described state refresh message that stop forwarding data mode and sends duration at interval;
When described outgoing interface be in the duration that stops forwarding data mode less than described state refresh message send duration at interval preset multiple the time, described outgoing interface is in the duration that stops forwarding data mode is updated to the multiple that presets that described state refresh message sends duration at interval;
When described outgoing interface is in duration after the duration that stops forwarding data mode reaches renewal, change described outgoing interface into the forwarding data mode by stopping forwarding data mode.
The embodiment of the invention provides a kind of device that changes the three-layer network Interface status on the other hand, comprising:
Receiving element is used for the accepting state refresh message;
Judging unit, when being used to receive described state refresh message, whether the outgoing interface of judging described three-layer network appliance is in and stops forwarding data mode;
Comparing unit is used for receiving described outgoing interface when being in the message that stops forwarding data mode from described judging unit, obtains and compares interface and be in the size that the duration that stops forwarding data mode and state refresh message send duration at interval;
Updating block, be used for receiving described outgoing interface and be in the duration that stops forwarding data mode from comparing unit, less than described state refresh message send duration at interval preset the message of multiple the time, described outgoing interface is in the duration that stops forwarding data mode, is updated to the multiple that presets that described state refresh message sends the interval duration;
The Interface status conversion unit, be used for described outgoing interface be in the duration that stops forwarding data mode reach described state refresh message send duration at interval preset multiple the time, change described outgoing interface into the forwarding data mode by stopping forwarding data mode.
Above technical scheme as can be seen, the embodiment of the invention is when transmitting behind the accepting state refresh message, if being in, outgoing interface stops forwarding data mode, and this outgoing interface is in the preset multiple of the duration of the state of stopping forwarding less than state refresh message transmission interval duration, the duration that this outgoing interface is in the state of stopping forwarding is updated to the multiple that presets that state refresh message sends the interval duration, like this, when changing the transmission interval of state refresh message, corresponding renewal outgoing interface is in the duration of the state of stopping forwarding, the list item of outgoing interface tabulation can not make a mistake like this, solved that data arrive the node that does not have demand data in the network, the problem of waste network bandwidth resources.
Description of drawings
The flow chart that Fig. 1 provides for the embodiment of the invention;
The device schematic diagram that Fig. 2 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of method and apparatus that changes the three-layer network appliance Interface status, for making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Referring to Fig. 1, the flow chart that the embodiment of the invention provides:
101: the accepting state refresh message;
102:, then obtain described outgoing interface and be in the duration and the described state refresh message that stop forwarding data mode and send duration at interval if outgoing interface is in and stops forwarding data mode when transmitting described state refresh message;
103: when described outgoing interface be in the duration that stops forwarding data mode less than described state refresh message send duration at interval preset multiple the time, described outgoing interface is in the duration that stops forwarding data mode is updated to the multiple that presets that described state refresh message sends duration at interval;
104: described outgoing interface be in the duration that stops forwarding data mode reach described state refresh message send duration at interval preset multiple the time, change described outgoing interface into the forwarding data mode by stopping forwarding data mode.
Wherein, described outgoing interface is the outgoing interface of router or the outgoing interface of switch, enumerates embodiment with regard to both of these case respectively below and is elaborated:
Embodiment one, when described three-layer network appliance is router:
11): the periodic accepting state refresh message of router, state refresh message is produced by first hop router, and spreads to the whole network;
12): to the state refresh message that received when outgoing interface is transmitted, if the outgoing interface of router is from outgoing interface tabulation deletion, outgoing interface is in and stops forwarding data mode, obtain outgoing interface and be in the duration that stops forwarding data mode, for example, when router-A and router B receive multicast packet respectively, two routers are selected A and for the winner data are transmitted, router B is the outgoing interface tabulation deletion of the outgoing interface of self from list item, send beta pruning message to router-A simultaneously, when router-A receives the beta pruning message of router B transmission, if the downstream does not have Data Receiving person, the outgoing interface of final route device A is by from the tabulation of outgoing interface deletion, and the outgoing interface of router-A is in the beta pruning state, obtains the time-out time of beta pruning timer of outgoing interface of the router-A of setting;
13): to the transmission time interval of the state refresh message that received be the accepting state refresh message the time interval preset multiple, being in the duration that stops forwarding data mode with the outgoing interface of the router that is provided with compares, if the outgoing interface of router is in the duration that the stops forwarding data mode multiple that presets less than time interval of transmit status refresh message, then the outgoing interface of router is in the duration that stops forwarding data mode be updated to the transmit status refresh message the time interval preset multiple, for example, when router-A receives state refresh message, the outgoing interface of router-A is in the beta pruning state, and the time-out time of beta pruning timer is 180 seconds, and the transmission cycle in the state refresh message is 200 seconds, by checking that 200 seconds three times were greater than 180 seconds, then the time-out time with the beta pruning timer of router-A outgoing interface was updated to 600 seconds, like this, the beta pruning timer of the outgoing interface of router-A is can be overtime after 600 seconds, change protocol status, state refresh message sent once every 200 seconds, refresh the outgoing interface beta pruning timer of router-A, the time-out time of this timer of resetting is 600 seconds later time points.
14): described outgoing interface be in the duration that stops forwarding data mode reach described state refresh message send duration at interval preset multiple the time, the outgoing interface of described router adds the outgoing interface tabulation again, changes described outgoing interface into the forwarding data mode by stopping forwarding data mode.
Wherein, described state refresh message transmission duration at interval carries in described state refresh message; Perhaps, the time interval that receives described state refresh message is added up, obtained described state refresh message and send duration at interval.
From this embodiment as can be seen, because the outgoing interface of router is in the duration that stops forwarding data mode, be according to the transmission of institute's accepting state refresh message at interval duration be provided with, so when changing state refresh message transmission interval duration, the outgoing interface of router can both refresh outgoing interface accordingly and be in the duration that stops forwarding data mode, and then can avoid because the problem of the network resources waste that router causes owing to the outgoing interface tabulation makes a mistake.
Embodiment two, when described three-layer network appliance is three-tier switch:
21): the periodic accepting state refresh message of three-tier switch, state refresh message is produced by the source three-tier switch, and spreads to the whole network;
22): to the state refresh message that received when outgoing interface is transmitted, if the outgoing interface of three-tier switch from outgoing interface tabulation deletion, outgoing interface is in and stops forwarding data mode, obtains outgoing interface and is in the duration that stops forwarding data mode;
23): to the transmission time interval of the state refresh message that received be the accepting state refresh message the time interval preset multiple, being in the duration that stops forwarding data mode with the outgoing interface of the three-tier switch that is provided with compares, if the outgoing interface of three-tier switch is in the duration that stops forwarding data mode less than the multiple that presets in time interval of transmit status refresh message, then the outgoing interface of three-tier switch is in the duration that stops forwarding data mode be updated to the transmit status refresh message the time interval preset multiple;
24): described outgoing interface be in the duration that stops forwarding data mode reach described state refresh message send duration at interval preset multiple the time, the outgoing interface of described three-tier switch adds the outgoing interface tabulation again, changes described outgoing interface into the forwarding data mode by stopping forwarding data mode.
Wherein, the described multiple that presets is stipulated according to agreement, can be three times.
Wherein, described state refresh message transmission duration at interval carries in described state refresh message; Perhaps, the time interval that receives described state refresh message is added up, obtained described state refresh message and send duration at interval.
From this embodiment as can be seen, because the outgoing interface of three-tier switch is in the duration that stops forwarding data mode, be according to the transmission of institute's accepting state refresh message at interval duration be provided with, so when changing state refresh message transmission interval duration, the outgoing interface of three-tier switch can both refresh outgoing interface accordingly and be in the duration that stops forwarding data mode, and then can avoid because the problem of the network resources waste that router causes owing to the outgoing interface tabulation makes a mistake.
Referring to Fig. 2, the device schematic diagram that provides for the embodiment of the invention:
The embodiment of the invention provides a kind of device that changes the three-layer network appliance Interface status, comprising:
Receiving element 201 is used for periodic accepting state refresh message;
Comparing unit 203, be used for receiving described interface when being in the message that stops forwarding data mode from described judging unit 202, obtain that outgoing interface is in the duration that stops forwarding data mode and state refresh message sends duration at interval, compare interface and be in the size that the duration that stops forwarding data mode and state refresh message send the duration at interval;
Updating block 204, be used for receiving described outgoing interface and be in the duration that stops forwarding data mode from comparing unit 203, less than described state refresh message send duration at interval preset the message of multiple the time, described outgoing interface is in the duration that stops forwarding data mode, is updated to the multiple that presets that described state refresh message sends the interval duration;
Interface status conversion unit 205, be used for described outgoing interface be in the duration that stops forwarding data mode reach described state refresh message send duration at interval preset multiple the time, change described outgoing interface into the forwarding data mode by stopping forwarding data mode.
Wherein, the device of described transformation three-layer network appliance Interface status further comprises:
Transmitting element 206 is used for when described judging unit 202 obtains described outgoing interface and is in the message that stops forwarding data mode, sends after described state refresh message is added the sign that stops forwarding data.
Wherein, the device of described transformation three-layer network appliance Interface status is router or three-tier switch.
Wherein, the described multiple that presets is stipulated according to agreement, can be three times.
Above embodiment as can be seen, the embodiment of the invention is when transmitting behind the accepting state refresh message, if being in, outgoing interface stops forwarding data mode, and this outgoing interface is in the preset multiple of the duration of the state of stopping forwarding less than state refresh message transmission interval duration, the duration that this outgoing interface is in the state of stopping forwarding is updated to the multiple that presets that state refresh message sends the interval duration, like this, when changing the transmission interval of state refresh message, corresponding renewal outgoing interface is in the duration of the state of stopping forwarding, the list item of outgoing interface tabulation can not make a mistake like this, solved that data arrive the node that does not have demand data in the network, the problem of waste network bandwidth resources.
More than a kind of method and apparatus that changes the three-layer network appliance Interface status that present embodiment provided is described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (9)
1, a kind of method that changes the three-layer network appliance Interface status is characterized in that, comprising:
The accepting state refresh message if outgoing interface is in and stops forwarding data mode during to described state refresh forwards, then obtains described outgoing interface and is in the duration and the described state refresh message that stop forwarding data mode and sends duration at interval;
When described outgoing interface be in the duration that stops forwarding data mode less than described state refresh message send duration at interval preset multiple the time, described outgoing interface is in the duration that stops forwarding data mode is updated to the multiple that presets that described state refresh message sends duration at interval;
When described outgoing interface is in duration after the duration that stops forwarding data mode reaches renewal, change described outgoing interface into the forwarding data mode by stopping forwarding data mode.
2, method according to claim 1 is characterized in that, the described described state refresh message transmission duration at interval that obtains comprises:
From the state refresh message that receives, obtain described state refresh message and send duration at interval; Perhaps, the time interval that receives described state refresh message is added up, obtained described state refresh message and send duration at interval.
3, method according to claim 1 is characterized in that, described outgoing interface is in and stops forwarding before the data mode, comprising:
With of the outgoing interface tabulation deletion of described outgoing interface from list item.
4, method according to claim 1 is characterized in that, described outgoing interface changes the forwarding data mode into by stopping forwarding data mode, comprising:
Described outgoing interface adds the outgoing interface tabulation of list item again.
5, method according to claim 1 is characterized in that, the described multiple that presets is three times.
6, a kind of device that changes the three-layer network appliance Interface status is characterized in that, comprising:
Receiving element is used for the accepting state refresh message;
Judging unit, when being used to receive described state refresh message, whether the outgoing interface of judging described three-layer network appliance is in and stops forwarding data mode;
Comparing unit, be used for when the outgoing interface that described judging unit receives described three-layer network appliance is in the message that stops forwarding data mode, obtain and compare interface and be in the size that the duration that stops forwarding data mode and state refresh message send duration at interval;
Updating block, be used for receiving described outgoing interface and be in the duration that stops forwarding data mode from comparing unit, less than described state refresh message send duration at interval preset the message of multiple the time, described outgoing interface is in the duration that stops forwarding data mode, is updated to the multiple that presets that described state refresh message sends the interval duration;
The Interface status conversion unit, be used for described outgoing interface be in the duration that stops forwarding data mode reach described state refresh message send duration at interval preset multiple the time, change described outgoing interface into the forwarding data mode by stopping forwarding data mode.
7, device according to claim 6 is characterized in that, described device further comprises:
Transmitting element is used for when described judging unit obtains described outgoing interface and is in the message that stops forwarding data mode, sends after described state refresh message is added the sign that stops forwarding data.
8, device according to claim 6 is characterized in that, described device is router or three-tier switch.
9, device according to claim 6 is characterized in that, the described multiple that presets is three times.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100903431A CN100542142C (en) | 2007-04-04 | 2007-04-04 | Change the method and apparatus of three-layer network appliance Interface status |
| PCT/CN2008/070636 WO2008122234A1 (en) | 2007-04-04 | 2008-03-31 | Mothod for handling three-layered network's interface state and three-layered network equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100903431A CN100542142C (en) | 2007-04-04 | 2007-04-04 | Change the method and apparatus of three-layer network appliance Interface status |
Publications (2)
| Publication Number | Publication Date |
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| CN101039276A CN101039276A (en) | 2007-09-19 |
| CN100542142C true CN100542142C (en) | 2009-09-16 |
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| CNB2007100903431A Expired - Fee Related CN100542142C (en) | 2007-04-04 | 2007-04-04 | Change the method and apparatus of three-layer network appliance Interface status |
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| WO (1) | WO2008122234A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103220187B (en) * | 2013-04-03 | 2016-03-30 | 北京东土科技股份有限公司 | A kind of detection method of three layer interface states and device |
| US9749220B2 (en) * | 2014-09-19 | 2017-08-29 | Telefonaktiebolaget L M Ericsson (Publ) | Automated determination of tree attributes and assignment of receiver identifiers by distributed election in multicast architectures relying on packets identifying intended receivers |
| CN106878188B (en) * | 2017-01-16 | 2019-11-12 | 新华三技术有限公司 | A kind of sending method that asserting message and device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1014746B1 (en) * | 1998-12-23 | 2004-09-22 | Alcatel | Multicast shortcut routing 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 |
| JP2006086890A (en) * | 2004-09-16 | 2006-03-30 | Fujitsu Ltd | Network system, data transmission device, terminal device, and broadcast communication method |
| US7720994B2 (en) * | 2005-01-13 | 2010-05-18 | Cisco Technology, Inc. | Method for suppression of multicast join/prune messages from extranet receivers |
| CN100596141C (en) * | 2005-09-15 | 2010-03-24 | 杭州华三通信技术有限公司 | Method for establishing optimistically PIM-DM route table entry |
| CN100440818C (en) * | 2006-07-18 | 2008-12-03 | 杭州华三通信技术有限公司 | Method for raising group broadcasting requested broadcasting success rate and protocol extraneous group broadcasting routing device |
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- 2007-04-04 CN CNB2007100903431A patent/CN100542142C/en not_active Expired - Fee Related
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| WO2008122234A1 (en) | 2008-10-16 |
| CN101039276A (en) | 2007-09-19 |
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