CN104702513A - Improved method for deploying PIM-DM in narrow-band network - Google Patents
Improved method for deploying PIM-DM in narrow-band network Download PDFInfo
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- CN104702513A CN104702513A CN201310661826.8A CN201310661826A CN104702513A CN 104702513 A CN104702513 A CN 104702513A CN 201310661826 A CN201310661826 A CN 201310661826A CN 104702513 A CN104702513 A CN 104702513A
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- pim
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Abstract
The present invention relates to an improvement of PIM-DM (Protocol Independent Multicast-Dense Mode) in a narrow-band network. An improved mode is that a multicast forwarding tree is established in the network through the flooding of a signaling mode. PIM-DM is a protocol driven by a data stream. The multicast forwarding tree using a data source as a root is started to be established when a multicast data message is sent from the data source. Because the PIM-DM is a flooding and pruning mechanism, the multicast data stream can be flooded within the entire network before a shortest path tree is established. If the bandwidth of a trunk link is narrow, the flooding causes that trunk bandwidth is wasted and the utilization rate of network resources is low. The signaling mode specified in the present invention replaces a data stream mode for finishing the establishment of the multicast forwarding tree. The improved method can be applied to the narrow-band network using PIM-DM for increasing the utilization rate of the network resources. The improved method of the present invention has the beneficial effects that: the flooding of the signaling mode is used for replacing the flooding of the data message; the situation that the flooding of the data message wastes a large amount of trunk bandwidth is avoided; and the utilization efficiency of the network is increased.
Description
Technical field
The present invention relates to a kind of improving one's methods at narrowband network deployment PIM-DM.
Background technology
PIM-DM (Protocol Independent Multicast-Dense Mode) is a kind of multicast routing protocol of intensive topological structure, utilize to flood-pruning machine is made as IP network provides Multicast Routing service.
Flooding process: when data source sends multicast data message to the multicast router of first in IP network, this router starts this message to send its total interface (except receiving interface) is upper.
Beta pruning process: receiving router performs RPF (Reverse Path Forwarding) and checks, if check by (receiving interface is the optimum interface in arrival source) continuation execution flooding process; If check unsuccessfully, upstream transmission router sends beta pruning signaling makes the subsequent packet of this router not re-send to this interface.
Flooding process terminates the Multicast Routing forwarding tree also corresponding formation of the whole network.
PIM-DM in the problem of narrow band link is: if most main frame is all multicast packet source in network, each main frame can be initiated data and be flooded, bandwidth can waste by data flooding process.
Summary of the invention
Based on the practical problem addressed in background technology, the present invention proposes improving one's methods of a kind of PIM-DM.The method utilizes flooding of signaling to replace flooding of data message.
The method comprises:
1. multicast router reads configuration file, and obtain (S, G) information, multicast router is judged, and whether oneself can become signaling source;
If 2. multicast router is signaling source, flood signaling message to all multicast interface according to the timer parameter cycle;
3. receiving router takes out the source information of signaling message, performs rpf check.
The invention has the beneficial effects as follows: replace the flooding of data message by flooding of signaling method, avoid data message and to flood a large amount of trunk bandwidth of waste, improve the service efficiency of network.
Accompanying drawing explanation
Fig. 1 configuration file format figure.
Fig. 2 message format figure.
Embodiment
Embodiment describes from 3 aspects.
1. obtain (S, G) information
Read as the configuration file of Fig. 1 during multicast router initialization, judge source IP address whether on oneself direct-connected Ethernet.If judge successfully, this multicast router needs to send this (S, G) signaling.
Allow in network to exist multiple (S, G), so multicast router needs to travel through whole configuration file table.
2. send signaling message
Multicast router is that each (S, G) sent that need forms independent timer, and the time-out time of timer is by default.
When the timer times out, assemble message according to the message format of Fig. 2 and send.
This message meets the consolidation form of PIM-DM message, and difference is type field is 9.
3. receive signaling message
Multicast router receives type when being the PIM-DM signaling message of 9, processes according to multicast data message.
If now need to set up multicast forward table without multicast forward table.
Claims (2)
1. the improving one's methods an of PIM-DM, it is characterized in that utilizing the type of message newly added flood replace data flood form multicast forward table.
2. the feature of type of message according to claim 1 is: use original PIM-DM form, add type of message 9, and message content is multicast source address and multicast group address.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310661826.8A CN104702513A (en) | 2013-12-10 | 2013-12-10 | Improved method for deploying PIM-DM in narrow-band network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310661826.8A CN104702513A (en) | 2013-12-10 | 2013-12-10 | Improved method for deploying PIM-DM in narrow-band network |
Publications (1)
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| CN104702513A true CN104702513A (en) | 2015-06-10 |
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| CN201310661826.8A Pending CN104702513A (en) | 2013-12-10 | 2013-12-10 | Improved method for deploying PIM-DM in narrow-band network |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002065701A1 (en) * | 2001-02-13 | 2002-08-22 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for multicast routing protocol interoperability |
| CN1741533A (en) * | 2005-09-15 | 2006-03-01 | 杭州华为三康技术有限公司 | Method for establishing optimistically PIM-DM route table entry |
| US7403492B2 (en) * | 2005-05-05 | 2008-07-22 | Meshnetworks, Inc. | Method to support multicast routing in multi-hop wireless networks |
| CN102244582A (en) * | 2010-05-13 | 2011-11-16 | 杭州华三通信技术有限公司 | Multicast transmission method and system thereof in BIDIR-PIM network |
-
2013
- 2013-12-10 CN CN201310661826.8A patent/CN104702513A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002065701A1 (en) * | 2001-02-13 | 2002-08-22 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for multicast routing protocol interoperability |
| US7403492B2 (en) * | 2005-05-05 | 2008-07-22 | Meshnetworks, Inc. | Method to support multicast routing in multi-hop wireless networks |
| CN1741533A (en) * | 2005-09-15 | 2006-03-01 | 杭州华为三康技术有限公司 | Method for establishing optimistically PIM-DM route table entry |
| CN102244582A (en) * | 2010-05-13 | 2011-11-16 | 杭州华三通信技术有限公司 | Multicast transmission method and system thereof in BIDIR-PIM network |
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Application publication date: 20150610 |