CN102208995A - Multicast protection method and device - Google Patents
Multicast protection method and device Download PDFInfo
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- CN102208995A CN102208995A CN2011101141997A CN201110114199A CN102208995A CN 102208995 A CN102208995 A CN 102208995A CN 2011101141997 A CN2011101141997 A CN 2011101141997A CN 201110114199 A CN201110114199 A CN 201110114199A CN 102208995 A CN102208995 A CN 102208995A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
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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
- H04L12/1863—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast comprising mechanisms for improved reliability, e.g. status reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/16—Multipoint routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
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Abstract
The invention discloses a multicast protection method and a multicast protection device. Ports of a main link and a standby link in upstream equipment are all taken as multicast group users, different message packaging states are configured for the ports of the main and standby links, and multicast data messages are normally transmitted to the upstream equipment without influence. In the method and the device, switching between the main and standby links is performed by changing the message packaging states of the ports of the main and standby links, and the rapid protection of a multicast service is realized; and the method and the device have the advantages of bandwidth saving, high network security and the like.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method and apparatus of realizing the multicast protection.
Background technology
Multicasting technology has effectively solved single-point and has sent the problem that multiple spot receives, realized of the efficient data transmission of network mid point to multiple spot, conserve network bandwidth reduces offered load in a large number, utilizes the multicast feature of network that some new value-added services can be provided easily.
Along with multicasting technology is used more and more widely, when network breaks down, requirements at the higher level have been proposed for the aspects such as reliability of multicast service in network.The now common method that in network, realizes the multicast protection; have only primary link effective under the normal condition; as the multicast group user; by OAM (Operation Administration and Maintenance; operation; management; safeguard)/CFM (Connectivity Fault Management; the link failure management)/BFD (Bidirectional Forwarding Detection; two-way forwarding detects) etc. detection technique detect after primary link lost efficacy; need on standby link, receive IGMP (Internal Group Management Protocol; igmpinternet) after multicast joins message; just generate multicast forward table; and then standby link become effective link; original primary link is deleted from the multicast group user, is that standby link joins among the multicast group user with new active link.The problem that such protection mechanism exists is exactly: the time of active/standby link switchover must comprise the required time of multicast protocol reciprocal process, causes the reliability of performance of handoffs and multicast service not satisfy growing multicast group user's demand.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method and apparatus of realizing the multicast protection, shortening multicast protection required time of reversed process, the reliability of raising multicast service.
The technical solution used in the present invention is, the method for described realization multicast protection disposes main/slave link between upstream equipment and upstream device, and this method comprises:
Main/slave link port in the upstream equipment all as the multicast group user, is the different message encapsulation state of described main/slave link port arrangement;
By changing the message encapsulation state of described main/slave link port, carry out active/standby link switchover.
Further, described with the main/slave link port in the upstream equipment all as the multicast group user, specifically comprise:
On upstream equipment, be main/slave link configuration multicast inquiry device;
When user's equipment transmission downstream multicast joined message, upstream equipment all received that by described multicast inquiry device the described multicast of upstream device transparent transmission joins message on the main/slave link port;
Upstream equipment is that described multicast joins message and sets up the multicast forward table comprise the main/slave link port simultaneously.
Further, described is the different message encapsulation state of main/slave link port arrangement, specifically comprises:
For the main/slave link port is set up package information table, and the package information table that the primary link port is set effectively and the package information table of standby link port invalid.
Further, described message encapsulation state by change main/slave link port is carried out active/standby link switchover, specifically comprises:
When primary link lost efficacy, by be provided with standby link port package information table effectively and primary link port package information table invalid, make standby link replace primary link as active link.
Further, this method also comprises:
When primary link recovers, by be provided with primary link port package information table effectively and standby link port package information table invalid, make primary link again as active link.
The present invention also provides a kind of device of realizing the multicast protection, disposes main/slave link between upstream equipment and upstream device, and this device comprises:
Multicast group user's generation module is used for main/slave link port with upstream equipment all as the multicast group user;
Message encapsulation state initial configuration module is used to the different message encapsulation state of described main/slave link port arrangement;
The active/standby link switchover module is used for carrying out active/standby link switchover by changing the message encapsulation state of described main/slave link port.
Further, described multicast group user's generation module specifically comprises:
The configuration submodule is used for being main/slave link configuration multicast inquiry submodule on upstream equipment;
The multicast inquiry submodule is used for receiving all that on the main/slave link port the described multicast of upstream device transparent transmission joins message when user's equipment transmission downstream multicast joins message;
Transmit and set up submodule, be used to described multicast to join message and set up the multicast forward table that comprises the main/slave link port simultaneously.
Further, described message encapsulation state initial configuration module specifically is used for:
For the main/slave link port is set up package information table, and the package information table that the primary link port is set effectively and the package information table of standby link port invalid.
Further, described active/standby link switchover module specifically is used for:
When primary link lost efficacy, by be provided with standby link port package information table effectively and primary link port package information table invalid, make standby link replace primary link as active link.
Further, described active/standby link switchover module also is used for:
When primary link recovers, by be provided with primary link port package information table effectively and standby link port package information table invalid, make primary link again as active link.
Adopt technique scheme, the present invention has following advantage at least:
The method and apparatus of realization multicast protection of the present invention all as the multicast group user, for the different message encapsulation state of main/slave link port arrangement, normally issues the main/slave link port in the upstream equipment multicast data message to upstream equipment and does not exert an influence.The present invention carries out active/standby link switchover by the message encapsulation state of change main/slave link port, has realized the quick protection to multicast service, and has the bandwidth of saving, internet security advantages of higher.
Description of drawings
Fig. 1 is upstream equipment of the present invention, upstream device, multicast source devices and user's an annexation schematic diagram;
Fig. 2 is a method flow diagram of realizing the multicast protection described in the first embodiment of the invention;
Fig. 3 is that the device of realizing the multicast protection described in the second embodiment of the invention is formed schematic diagram.
Embodiment
Reach technological means and the effect that predetermined purpose is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, the present invention is described in detail as after.
First embodiment of the invention; upstream equipment, upstream device, multicast source devices and user's annexation as shown in Figure 1; configuration protection passage between upstream equipment and upstream device; upstream device can and a plurality of upstream equipment between set up the protection passage; comprise primary link and standby link in the protection passage; and on the main/slave link of protection passage testing mechanism such as configuration OAM/CFM/BFD etc., be used to detect the fault of link or port.
In the present embodiment, realize the method for multicast protection, as shown in Figure 2, comprise following concrete steps:
Step S1, with the main/slave link port in the upstream equipment all as the multicast group user.Step S1 specifically comprises:
S11 is main/slave link configuration multicast inquiry device on upstream equipment;
S12, when user's equipment transmission downstream multicast joined message, upstream equipment all received that by described multicast inquiry device this multicast that the upstream device transparent transmission comes joins message on the main/slave link port;
S13, upstream equipment set up the multicast forward table that comprises the main/slave link port simultaneously for this multicast joins message.
Step S2 is the different message encapsulation state of described main/slave link port arrangement.Concrete, for the main/slave link port is set up package information table, and make the package information table of primary link port effective by the significant notation of revising in the package information table, make the package information table of standby link port invalid simultaneously.
Step S3 when primary link lost efficacy, by changing the message encapsulation state of described main/slave link port, carries out active/standby link switchover, makes standby link replace primary link as active link.Concrete, when primary link lost efficacy, it is effective and primary link port package information table is invalid that standby link port package information table is set.
Optionally, this method also comprises:
Step S4 when primary link recovers, by changing the message encapsulation state of described main/slave link port, carries out active/standby link switchover, makes primary link again as active link.Concrete, when primary link recovered, it is effective and standby link port package information table is invalid that primary link port package information table is set.
Second embodiment of the invention, a kind of device of realizing the multicast protection disposes main/slave link between upstream equipment and upstream device; as shown in Figure 3; because the process of active/standby link switchover realizes that on upstream equipment this device is arranged in upstream equipment, specifically comprises following part:
1) multicast group user generation module is used for main/slave link port with upstream equipment all as the multicast group user.This multicast group user generation module specifically comprises:
The configuration submodule is used for being main/slave link configuration multicast inquiry submodule on upstream equipment.
The multicast inquiry submodule is used for receiving all that on the main/slave link port this multicast that the upstream device transparent transmission comes joins message when user's equipment transmission downstream multicast joins message.This multicast inquiry submodule can be the multicast inquiry device.
Transmit and set up submodule, be used to this multicast to join message and set up the multicast forward table that comprises the main/slave link port simultaneously.
2) message encapsulation state initial configuration module is used to the different message encapsulation state of main/slave link port arrangement.Concrete, this message encapsulation state configuration module is set up package information table for the main/slave link port, and makes the package information table of primary link port effective by the significant notation of revising in the package information table, makes the package information table of standby link port invalid simultaneously.
3) active/standby link switchover module is used for the message encapsulation state by change main/slave link port, carries out active/standby link switchover.Concrete, when primary link lost efficacy, this active/standby link switchover module by be provided with standby link port package information table effectively and primary link port package information table invalid, make standby link replacement primary link as active link.
Optionally, when primary link recovers, this active/standby link switchover module can also by be provided with primary link port package information table effectively and standby link port package information table invalid, make primary link again as active link.
Third embodiment of the invention is an example with the protection passage in Fig. 1 middle and upper reaches equipment and the upstream device, introduces the process that the technical scheme that adopts first embodiment of the invention realizes that the main/slave link protection is switched, and is specific as follows:
First: upstream device, upstream equipment join message based on the IGMP multicast and set up the flow process of multicast forward table.
S101: configuration protection passage on upstream equipment and upstream device, and on the main/slave link of upstream equipment and upstream device protection passage testing mechanism such as configuration OAM/CFM/BFD.
S102: user 1, user 2 ..., user N respectively downstream equipment send the IGMP multicast and join message, specify the multicast data message of wishing to receive concrete multicast group.
S103: multicast address in joining message according to this IGMP multicast on the upstream device and the instance number of this protection passage formation multicast forward table; and corresponding port on this N user's downstream equipment joined in this multicast forward table, and set up corresponding package information table for this N user's corresponding port.Downstream equipment it seems that this N user is the multicast group user who has added multicast group.The join message multicast address that carries of IGMP multicast can make multicast group address under the multicast data message, and perhaps multicast group address adds the address of multicast source.
S104: on upstream equipment,, allow the main/slave link of upstream equipment can receive that the IGMP multicast that sends over from upstream device joins message for main/slave link configuration IGMP multicast inquiry device.
S105: multicast address during upstream equipment joins message according to this IGMP multicast and the instance number corresponding with this protection passage form multicast forward table; and the main/slave link corresponding port all joined in this multicast forward table; at upstream equipment, the main/slave link corresponding port has all added multicast group as the multicast group user.Simultaneously, the package information table of upstream link primary link port correspondence is set to effectively, and it is invalid that the package information table of standby link port correspondence is set to.
Second portion: upstream equipment is based on the flow process of the multicast forward table multicast data forwarding message of setting up.
S201: upstream equipment is received the multicast data message that multicast source devices sends, and parses wherein multicast address and multicast address, uses the instance number of multicast address and protection passage correspondence to search multicast forward table, and multicast data message is duplicated two parts.A multicast data message encapsulation after will duplicating according to the package information table of primary link port sends the packet loss after according to the package information table of standby link port another part being duplicated simultaneously.Assurance has only a multicast data message to send to upstream device.
S202: upstream device receives the multicast data message that upstream equipment sends over; parse the instance number and the multicast address of protection passage correspondence wherein; use the instance number of multicast address and protection passage correspondence to search multicast forward table; package information table according to the port correspondence is duplicated multicast data message, sends to a plurality of users.
Third part: upstream equipment is realized the flow process of active/standby link switchover.
S301: under the initial condition, the package information table of upstream equipment primary link port is set to effectively, and it is invalid that the package information table of standby link port is set to.
S302: the upstream device upstream device is regularly sent detection messages such as OAM/CFM/BFD at regular intervals.Can be set up on their own as required this blanking time by the user.
S303: upstream equipment detects beginning, if do not receive any one message in the time detecting thresholding, think these link existing problems so, as primary link down, this link is thought to lose efficacy.It is invalid that the package information table of upstream equipment primary link port is set to, and the package information table of standby link port is set to effectively promptly finish active/standby link switchover simultaneously.
S304: if the link-recovery that lost efficacy normal, upstream equipment detects the message that several need detecting thresholding again in the time, it is normal to have thought this link-recovery so.If this link is a primary link, need so it again as active link, the mode of switching still is set to effectively by the package information table that the primary link port is set, and it is invalid that the package information table of standby link port is set to.
Compared with prior art, the present invention has the following advantages:
Main/slave link port in the upstream equipment all as the multicast group user, for the different message encapsulation state of main/slave link port arrangement, is normally issued multicast data message to upstream equipment and do not exert an influence.The present invention carries out active/standby link switchover by the message encapsulation state of change main/slave link port, has realized the quick protection to multicast service, and has the bandwidth of saving, internet security advantages of higher.
By the explanation of embodiment, should be to reach technological means and the effect that predetermined purpose takes to be able to more deeply and concrete understanding to the present invention, yet appended diagram only provide with reference to the usefulness of explanation, be not to be used for the present invention is limited.
Claims (10)
1. method that realizes multicast protection is characterized in that dispose main/slave link between upstream equipment and upstream device, this method comprises:
Main/slave link port in the upstream equipment all as the multicast group user, is the different message encapsulation state of described main/slave link port arrangement;
By changing the message encapsulation state of described main/slave link port, carry out active/standby link switchover.
2. according to the method for the described realization multicast of claim 1 protection, it is characterized in that, described with the main/slave link port in the upstream equipment all as the multicast group user, specifically comprise:
On upstream equipment, be main/slave link configuration multicast inquiry device;
When user's equipment transmission downstream multicast joined message, upstream equipment all received that by described multicast inquiry device the described multicast of upstream device transparent transmission joins message on the main/slave link port;
Upstream equipment is that described multicast joins message and sets up the multicast forward table comprise the main/slave link port simultaneously.
3. according to the method for claim 1 or 2 described realization multicast protections, it is characterized in that described is the different message encapsulation state of main/slave link port arrangement, specifically comprises:
For the main/slave link port is set up package information table, and the package information table that the primary link port is set effectively and the package information table of standby link port invalid.
4. according to the method for the described realization multicast protection of claim 3, it is characterized in that described message encapsulation state by change main/slave link port is carried out active/standby link switchover, specifically comprises:
When primary link lost efficacy, by be provided with standby link port package information table effectively and primary link port package information table invalid, make standby link replace primary link as active link.
5. according to the method for the described realization multicast protection of claim 4, it is characterized in that this method also comprises:
When primary link recovers, by be provided with primary link port package information table effectively and standby link port package information table invalid, make primary link again as active link.
6. device of realizing multicast protection is characterized in that dispose main/slave link between upstream equipment and upstream device, this device comprises:
Multicast group user's generation module is used for main/slave link port with upstream equipment all as the multicast group user;
Message encapsulation state initial configuration module is used to the different message encapsulation state of described main/slave link port arrangement;
The active/standby link switchover module is used for carrying out active/standby link switchover by changing the message encapsulation state of described main/slave link port.
7. according to the device of the described realization multicast protection of claim 6, it is characterized in that described multicast group user's generation module specifically comprises:
The configuration submodule is used for being main/slave link configuration multicast inquiry submodule on upstream equipment;
The multicast inquiry submodule is used for receiving all that on the main/slave link port the described multicast of upstream device transparent transmission joins message when user's equipment transmission downstream multicast joins message;
Transmit and set up submodule, be used to described multicast to join message and set up the multicast forward table that comprises the main/slave link port simultaneously.
8. according to the device of claim 6 or 7 described realization multicast protections, it is characterized in that described message encapsulation state initial configuration module specifically is used for:
For the main/slave link port is set up package information table, and the package information table that the primary link port is set effectively and the package information table of standby link port invalid.
9. the device of described according to Claim 8 realization multicast protection is characterized in that described active/standby link switchover module specifically is used for:
When primary link lost efficacy, by be provided with standby link port package information table effectively and primary link port package information table invalid, make standby link replace primary link as active link.
10. according to the device of the described realization multicast protection of claim 9, it is characterized in that described active/standby link switchover module also is used for:
When primary link recovers, by be provided with primary link port package information table effectively and standby link port package information table invalid, make primary link again as active link.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101141997A CN102208995A (en) | 2011-05-04 | 2011-05-04 | Multicast protection method and device |
| PCT/CN2012/074473 WO2012149872A1 (en) | 2011-05-04 | 2012-04-20 | Method and device for implementing multicast protection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101141997A CN102208995A (en) | 2011-05-04 | 2011-05-04 | Multicast protection method and device |
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| CN102208995A true CN102208995A (en) | 2011-10-05 |
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| CN2011101141997A Pending CN102208995A (en) | 2011-05-04 | 2011-05-04 | Multicast protection method and device |
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| WO (1) | WO2012149872A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012149872A1 (en) * | 2011-05-04 | 2012-11-08 | 中兴通讯股份有限公司 | Method and device for implementing multicast protection |
| CN106330699A (en) * | 2015-07-10 | 2017-01-11 | 中兴通讯股份有限公司 | Multicast link switching method, multicast link switching device and routing equipment |
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| CN101674199A (en) * | 2009-09-22 | 2010-03-17 | 中兴通讯股份有限公司 | Method for realizing switching during network fault and finders |
| CN102025541A (en) * | 2010-12-08 | 2011-04-20 | 中兴通讯股份有限公司 | Method and system for realizing multicast protection |
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| US8279749B2 (en) * | 2006-11-27 | 2012-10-02 | Cisco Technology, Inc. | Failure protection for P2MP tunnel head-end node |
| CN102208995A (en) * | 2011-05-04 | 2011-10-05 | 中兴通讯股份有限公司 | Multicast protection method and device |
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- 2011-05-04 CN CN2011101141997A patent/CN102208995A/en active Pending
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- 2012-04-20 WO PCT/CN2012/074473 patent/WO2012149872A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101043422A (en) * | 2006-03-24 | 2007-09-26 | 上海贝尔阿尔卡特股份有限公司 | Multicasting service protecting method of access network and its system, apparatus |
| CN101674199A (en) * | 2009-09-22 | 2010-03-17 | 中兴通讯股份有限公司 | Method for realizing switching during network fault and finders |
| CN102025541A (en) * | 2010-12-08 | 2011-04-20 | 中兴通讯股份有限公司 | Method and system for realizing multicast protection |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012149872A1 (en) * | 2011-05-04 | 2012-11-08 | 中兴通讯股份有限公司 | Method and device for implementing multicast protection |
| CN106330699A (en) * | 2015-07-10 | 2017-01-11 | 中兴通讯股份有限公司 | Multicast link switching method, multicast link switching device and routing equipment |
| WO2017008505A1 (en) * | 2015-07-10 | 2017-01-19 | 中兴通讯股份有限公司 | Switching method and apparatus for multicast link, and route device |
| CN106330699B (en) * | 2015-07-10 | 2020-06-02 | 中兴通讯股份有限公司 | Multicast link switching method and device and routing equipment |
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| WO2012149872A1 (en) | 2012-11-08 |
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Application publication date: 20111005 |