CN104065494A - Rack-type OLT equipment and method for achieving multicast VLAN therefor - Google Patents
Rack-type OLT equipment and method for achieving multicast VLAN therefor Download PDFInfo
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- CN104065494A CN104065494A CN201410314349.2A CN201410314349A CN104065494A CN 104065494 A CN104065494 A CN 104065494A CN 201410314349 A CN201410314349 A CN 201410314349A CN 104065494 A CN104065494 A CN 104065494A
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Abstract
The utility model provides rack-type OLT equipment and a method for achieving a multicast VLAN therefor. The OLT equipment comprises a main control card and a plurality of line card. The main control card comprises a main control multicast protocol module, and each line card comprises a PON chip, a switching chip, and a line-card multicast protocol module. The method is that the line-card multicast protocol modules are enabled to participate in the processing of a multicast protocol through separating a part of functions from the main control multicast protocol module; the line-card multicast protocol modules extract a group address and the multicast VLAN according to a first multicast protocol message from a user side, so as to form a second multicast protocol message which is sent to a main control card; the main control multicast protocol module extracts the a group address and a multicast VLAN according to a second multicast protocol message, so as to form a third multicast protocol message which is sent to a network side. The method can greatly reduce workload of the main control card of the rack-type OLT equipment, and can greatly prevent an illegal multicast to join a message which is sent to the main control card.
Description
Technical field
The present invention relates to a kind of equipment and method that realizes M-VLAN, particularly relate to a kind of rack OLT equipment of realizing many M-VLAN, and utilize rack OLT equipment to realize the method for many M-VLAN.
Background technology
In data communication network now, the demand of video traffic is ubiquitous, because the data traffic of video traffic is very large, multicast is as a kind of point-to-multipoint, be that single-point sends multipoint reception or multiple spot sends multipoint reception, efficient data communications, because it can effectively reduce offered load, saves the network bandwidth, so have a wide range of applications in video traffic.Operator is used local side apparatus to open multicast services, and for different access business, operator considers to use different VLAN (Virtual LocalArea Network) to distinguish.
At present, general access network equipment is done as a whole, can regard the equipment that only has an aspect as, and the realization of M-VLAN realizes in this one-level aspect.Generally, as two layers of OLT (Optical LineTerminal) equipment of Access Network, generally by a main control card and multiple business line cards, formed.Line card generally carries out the data retransmission of datum plane to be processed, and main control card generally carries out the processing of protocol control plane, and main control card protocol module need to be processed the protocol massages of every bracing cable card.And after the feature richness of equipment, main control card needs more protocol module to go to support, this also tends to cause main control card to occur performance issue.
For the multicast functionality of standard, generally only provide in same VLAN multicast traffic stream is copied and forwarded, be i.e. single multicast VLAN.In the system of single multicast VLAN, any group address is all only in groups in a unique VLAN, and main control card is in operation multicast protocol like this, and load is less comparatively speaking.But in the actual process of opening multicast service operation, single multicast VLAN just obviously cannot meet operator and with different VLAN, distinguish the requirement of the different business' of access video traffic.Therefore, in order to address this problem well, the arising at the historic moment of many M-VLAN technology.Utilize many M-VLAN technology, operator divides the difference access business who carries out video traffic with different M-VLAN.In many M-VLAN system, for different group addresss, in groups in different M-VLAN.So just require many M-VLAN protocol module, when it receives each multicast protocol message that comes from user's side, all need to carry out the judgement of group address, then according to group address, find its corresponding M-VLAN to carry out in groups.This certainly will increase the burden of main control card in the realization of many M-VLAN system.And because the number of users of the OLT device end of Access Network is huge, after many M-VLAN video traffic is opened, the amount of multicast protocol message is also very huge, so also may bring the performance issue of equipment.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of rack OLT equipment and realize the method for many M-VLAN, it is by isolating the part of functions of multicast protocol module on main control card, allow the participating in the middle of the processing of multicast protocol of line card, allow the M-VLAN address of system configuration on the protocol massages band that user's side sends over, then go to process mailing to main control card, can greatly alleviate the operating load of the main control card of rack OLT equipment like this, and also can prevent that illegal multicast from joining message to be sent in main control card goes.
For achieving the above object and other relevant objects, the invention provides a kind of rack OLT equipment, described OLT equipment comprises a main control card and a plurality of line card, and described main control card comprises master control multicast protocol module, and described line card comprises PON chip and exchange chip;
It is characterized in that, described line card also comprises line card multicast protocol module, described line card multicast protocol module is carried out the extraction of group address and M-VLAN for the first multicast protocol message that described line card is received, is the second multicast protocol message in groups and is sent to described main control card.
Preferably, described master control multicast protocol module is used for extracting described group address and described M-VLAN according to described the second multicast protocol message, and is that the 3rd multicast protocol message is sent to network side in groups.
Preferably, the first multicast protocol message described in described PON chip transparent transmission.
Preferably, described the first multicast protocol message is Report message.
A kind of method of using rack OLT equipment to realize many M-VLAN comprises:
Step 1, described line card receives described the first multicast protocol message from user's side;
Step 2, described line card multicast protocol module is extracted described group address and described M-VLAN according to described the first multicast protocol message, and to take described group address and described M-VLAN be described the second multicast protocol message in groups;
Step 3, described line card is sent to described main control card by described the second multicast protocol message, and described line card processing finishes;
Step 4, described main control card receives described the second multicast protocol message;
Step 5, described master control multicast protocol module is extracted described group address and described M-VLAN according to described the second multicast protocol message, and is described the 3rd multicast protocol message in groups;
Step 6, described main control card is sent to network side by described the 3rd multicast protocol message.
Step 7, described main control card processing finishes.
Preferably, it is legal that described step 2 also comprises that described group address to extracting and described M-VLAN judge whether: if legal, described the second multicast protocol message in groups; If illegal, abandon described line card end process.
Preferably, in described step 2, with described group address and described M-VLAN address, be that the outside VLAN in described the first multicast protocol message is replaced to described M-VLAN in groups, and safeguard software list item and the hardware table item of described line card self.
Preferably, described step 5 also comprises that described master control multicast protocol module judges whether successfully to obtain described M-VLAN: if successfully obtained, and described the 3rd multicast protocol message in groups; If unsuccessful, obtain, described main control card end process.
Preferably, in described step 5, described the 3rd multicast protocol message is with the software list item of described main control card self and hardware table item in groups in groups.
As mentioned above, a kind of rack OLT equipment of the present invention is realized the method for many M-VLAN, there is following beneficial effect: in the situation that do not introduce new protocol function module, by the existing module architectures of separation, optimization process flow, allow line card bear the partial function of multicast protocol, with this, alleviate the burden that main control card is processed multicast protocol massages.Meanwhile, the multicast of this one-level of line card is realized, and both can filter illegal multicast and join message, and can shield again the hardware differences of different line cards, and this has good using value in the realization of many M-VLAN.
Accompanying drawing explanation
Fig. 1 is shown as the structural representation of a kind of rack OLT equipment of the present invention.
Fig. 2 is shown as a kind of flow chart that uses rack OLT equipment to realize the method for many M-VLAN of the present invention.
Fig. 3 is shown as a kind of schematic flow sheet that uses a preferred embodiment of the method that rack OLT equipment realizes many M-VLAN of the present invention.
Element numbers explanation
1 rack OLT equipment
11 main control cards
111 master control multicast protocol modules
12 line cards
121 line card multicast protocol modules
122 exchange chips
123 PON chips
S21～S27 step
S221～S223 step
S251～S253 step
S31～S36 step
Embodiment
Below, by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification.The present invention can also be implemented or be applied by other different embodiment, and the every details in this specification also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.It should be noted that, in the situation that not conflicting, the feature in following examples and embodiment can combine mutually.
It should be noted that, the diagram providing in following examples only illustrates basic conception of the present invention in a schematic way, satisfy and only show with assembly relevant in the present invention in graphic but not component count, shape and size drafting while implementing according to reality, during its actual enforcement, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may be more complicated.
In the conventional network equipment, a physical equipment often only moves the agreement of one-level, by this equipment, only processes related protocol at the corresponding levels.OLT is as local side access device, and the traffic carrying capacity of an equipment is often all very large, and this processing to equipment CPU (CentralProcessing Unit) has very high requirement.In order to adapt to the demand of traffic carrying capacity, except the physical property by raising equipment, can also, in the optimization of the enterprising line correlation of design of software architecture, to the physics cost by equipment minimum, go to obtain maximum device processes performance.
Processing for multicast service, according to the relevant criterion of China Telecom, when protocol processes, multicast protocol module is indifferent to the entrained VLAN of protocol massages that terminal ONU (Optical Network Unit) equipment sends over, multicast protocol module is only concerned about the group address in multicast protocol message, then with this group address in correct M-VLAN in groups.For the system of single multicast VLAN, because whole system only exists a M-VLAN, it is just passable that any one group address is all stamped this VLAN.But for supporting the system of many M-VLAN just can not process like this, system can allow a plurality of M-VLAN to exist a moment simultaneously.This has just had more a process that finds its corresponding M-VLAN according to group address.
When having a large amount of users to access, the multicast protocol module of master control is to be dealt with is exactly the multicast protocol message of all line cards, and multicast protocol message amount this time will be huge.For each protocol massages, all to carry out the operation of seeking system M-VLAN, the process that this is searched can be frequent, certainly will increase like this burden of main control card.A kind of rack OLT equipment of the present invention is realized the method for many M-VLAN by this process of searching M-VLAN according to group address of separation, can greatly alleviate the burden of master control, while allowing the performance of master control and single multicast VLAN, does not have much difference.
The invention discloses a kind of rack OLT equipment 1 of supporting many M-VLAN function, its part of functions of isolating master control multicast protocol transfers to line card to complete, to alleviate the burden of main control card, specifically as shown in Figure 1, comprise a main control card 11 and a plurality of line card 12.Line card 12 is GPON line card or EPON line card.Main control card 11 comprises master control multicast protocol module 111, and line card 12 comprises line card multicast protocol module 121, exchange chip 122 and PON (Passive Optical Network) chip 123.Wherein, the multicast functionality conductively-closed of the PON chip 123 of line card 12, directly realizes multicast functionality by line card multicast protocol module 121.
PON chip 123 receives the first multicast protocol message of the user's side passing over by terminal ONU, and by the direct transparent transmission of the first multicast protocol message to exchange chip 122; Exchange chip 122 is sent to line card multicast protocol module 121 by the first multicast protocol message; Line card multicast protocol module 121 is extracted group address and M-VLAN according to the first multicast protocol message, according to group address and M-VLAN, is then the second multicast protocol message in groups, and the second multicast protocol message is sent to exchange chip 122; Exchange chip 122 is sent to last main control card 11 by the second multicast protocol message.Group address and M-VLAN that the master control multicast protocol module 111 of main control card 11 is extracted in the second multicast protocol message, be then the 3rd multicast protocol message in groups, finally the 3rd multicast protocol message is sent to network side.
Many M-VLAN of the present invention meet IGMP (Internet Group Management Protocol, IGMP) multicast protocol.IGMP comprises that three kinds are controlled message: 1) Report (leaving) message, the message being sent by main frame when inquiry that multicast member need to add multicast group or receive multicast router, multicast router adds multicast group by main frame and refreshes the state of multicast member; 2), Leave (report) message, the message initiatively sending when multicast member need to leave multicast group, multicast router leaves multicast group by main frame; 3) Query (inquiry) message, multicast router sends message in order to understand the state of multicast member, Query message is divided into general query and group-specific query, the former regularly sends, all multicast members in subnet can be responded Repot message, for the state of all multicast users in Refresh Subnet; The latter sends when receiving Leave message, for whether also having member in definite specific multicast group.The first multicast protocol message is Report message.
The invention also discloses a kind of method of using rack OLT equipment to realize many M-VLAN, its flow process specifically as shown in Figure 2, comprising:
Step 1 S21: the PON chip 123 of line card 12 receives the first multicast protocol message transmitting by terminal ONU from user's side, and by the transparent exchange chip 122 that is sent to of the first multicast protocol message, exchange chip 122 is sent to line card multicast protocol module 121 by the first multicast protocol message again.
Step 2 S22:
S221, group address and M-VLAN that line card multicast protocol module 121 is extracted in the first multicast protocol message;
S222, line card multicast protocol module 121 judges whether group address and M-VLAN are legal group address and the M-VLAN of system configuration: if illegal, think illegal multicast protocol message, abandoned; If legal, jump to S223;
S223 is the second multicast protocol message according to the group address extracting and M-VLAN in groups: the outside VLAN of the first multicast protocol message is replaced to M-VLAN, safeguard software list item and the hardware table item of line card self simultaneously.
Step 3 S23: line card multicast protocol module 121 is sent to exchange chip 122 by the second multicast protocol message, then is forwarded to main control card 11 by exchange chip 122, so far, the processing of line card 12 finishes;
Step 4 S24: the master control agreement control module 111 of master control 11 receives the second multicast protocol message, and the outside VLAN of the second multicast protocol message is exactly correct M-VLAN.
Step 5 S25:
S251, master control multicast protocol module 111 is extracted group address and M-VLAN from the second multicast protocol message;
S252, master control multicast protocol module 111 judges whether successfully to obtain M-VLAN: if successfully obtained, jump to S253; If successfully do not obtained, 11 end process processes of main control card;
S253, it is the 3rd multicast protocol message in groups that master control multicast protocol module 111 be take software list item and the hardware table item of main control card 11 self.
Step 6 S26: main control card 11 sends the 3rd multicast protocol message to network side.
Step 7 S27: the processing of main control card 11 finishes.
A preferred embodiment of a kind of method that realizes many M-VLAN of the present invention specifically as shown in Figure 3, system regulation: group address scope is that 224.1.1.1 is 1000 to 224.1.1.254, its corresponding M-VLAN.Accordingly, main control card 11, line card 12 are all stipulated to process with this.In Fig. 3, straight line represents up protocol massages, i.e. the transmission of Report message; Dotted line represents the transmission of descending protocol message; Chain-dotted line represents the transmission of multicast traffic stream.The transmission of up protocol massages is mainly described in the present embodiment:
S31: line card 12 has received that the user's side from ONU adds the Report message (the first multicast protocol message) of " group address is 224.1.1.10, and VLAN Tag (virtual local area network tags) is 123 ";
S32: the multicast functionality conductively-closed of the PON chip 123 of line card 12, the Report message of the direct transparent transmission of PON chip 123 " group address is 224.1.1.10, and VLAN Tag (virtual local area network tags) is 123 " is directly sent to exchange chip 122;
S33: exchange chip 122 sends to line card multicast protocol module 121 to realize multicast functionality the Report message of " group address is 224.1.1.10; VLAN Tag (virtual local area network tags) is 123 ": first search the configuration information of oneself, having found the M-VLAN that 224.1.1.10 is corresponding is 1000; Line card multicast protocol module 121 oneself with VLAN1000 and group address 224.1.1.10 in groups; Then convert the first multicast protocol message of original " VLAN123, the group address 224.1.1.10 " of ONU to " VLAN1000, group address 224.1.1.10 " second multicast protocol message;
S34: line card multicast protocol module 121 sends back exchange chip 122 again by " VLAN1000, group address 224.1.1.10 " second multicast protocol message;
S35: exchange chip 122 mails to main control card 11 by " VLAN1000, group address 224.1.1.10 " second multicast protocol message and goes to process;
S36: the second multicast protocol message that main control card 11 is received is with correct M-VLAN, so receive after " VLAN1000, group address 224.1.1.10 " second multicast protocol message when master control multicast protocol module 111, extract outside VLAN and group address from " VLAN1000, group address 224.1.1.10 " second multicast protocol message; Then to group address 224.1.1.10 directly with VLAN1000 in groups; Last master control multicast protocol module 111 is carried out relevant treatment and is that the 3rd multicast protocol message sends to network side in groups.
In sum, a kind of rack OLT equipment of the present invention and realize the method for many M-VLAN, first, by realizing multicast protocol at main control card and line card respectively, the VLAN that need to issue in the second multicast protocol message of main control card replaces to correct M-VLAN, reduced the burden of main control card, and can filter illegal joining message by line card multicast protocol module, made the master control multicast protocol module burden of upper level less.Secondly, line card sends to the second multicast protocol message of main control card with correct M-VLAN, so do not need main control card to go again to have searched M-VLAN according to group address, so greatly alleviated the burden of master control multicast protocol module, particularly at a main control card, be in charge of on the OLT equipment of polylith line card, have performance advantage clearly.Finally, shielded the multicast functionality of line card PON chip, because the PON chip of different line cards is different to the degree of support of multicast functionality, so shielded the multicast functionality of PON chip, namely shielded the hardware differences of dissimilar line card, strengthened the durability of module, be conducive to the unified of software module and safeguard.So the present invention has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (8)
1. a rack OLT equipment, described OLT equipment comprises a main control card and a plurality of line card, and described main control card comprises master control multicast protocol module, and described line card comprises PON chip and exchange chip;
It is characterized in that, described line card also comprises line card multicast protocol module, described line card multicast protocol module is carried out the extraction of group address and M-VLAN for the first multicast protocol message that described line card is received, is the second multicast protocol message in groups and is sent to described main control card.
2. rack OLT equipment according to claim 1, it is characterized in that, described master control multicast protocol module is used for extracting described group address and described M-VLAN according to described the second multicast protocol message, and is that the 3rd multicast protocol message is sent to network side in groups.
3. rack OLT equipment according to claim 1, is characterized in that, the first multicast protocol message described in described PON chip transparent transmission.
4. use rack OLT equipment as claimed in claim 1 to realize a method for many M-VLAN, it is characterized in that, the described method that realizes many M-VLAN comprises:
Step 1, described line card receives described the first multicast protocol message from user's side;
Step 2, described line card multicast protocol module is extracted described group address and described M-VLAN according to described the first multicast protocol message, and to take described group address and described M-VLAN be described the second multicast protocol message in groups;
Step 3, described line card is sent to described main control card by described the second multicast protocol message, and described line card processing finishes;
Step 4, described main control card receives described the second multicast protocol message;
Step 5, described master control multicast protocol module is extracted described group address and described M-VLAN according to described the second multicast protocol message, and is described the 3rd multicast protocol message in groups;
Step 6, described main control card is sent to network side by described the 3rd multicast protocol message.
Step 7, described main control card processing finishes.
5. the method that realizes many M-VLAN according to claim 4, is characterized in that, it is legal that described step 2 also comprises that described group address to extracting and described M-VLAN judge whether: if legal, described the second multicast protocol message in groups; If illegal, abandon described line card end process.
6. the method that realizes many M-VLAN according to claim 4, it is characterized in that, in described step 2, with described group address and described M-VLAN address, be that the outside VLAN in described the first multicast protocol message is replaced to described M-VLAN in groups, and safeguard software list item and the hardware table item of described line card self.
7. the method that realizes many M-VLAN according to claim 4, it is characterized in that, described step 5 also comprises that described master control multicast protocol module judges whether successfully to obtain described M-VLAN: if successfully obtained, and described the 3rd multicast protocol message in groups; If unsuccessful, obtain, described main control card end process.
8. the method that realizes many M-VLAN according to claim 4, is characterized in that, in described step 5, described the 3rd multicast protocol message is with the software list item of described main control card self and hardware table item in groups in groups.
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| CN111711570A (en) * | 2020-06-12 | 2020-09-25 | 芯河半导体科技(无锡)有限公司 | Method for realizing multicast protocol in network equipment |
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