CN103780982A - Olt device and epon system - Google Patents
Olt device and epon system Download PDFInfo
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- CN103780982A CN103780982A CN201210413779.0A CN201210413779A CN103780982A CN 103780982 A CN103780982 A CN 103780982A CN 201210413779 A CN201210413779 A CN 201210413779A CN 103780982 A CN103780982 A CN 103780982A
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Abstract
The invention discloses an OLT device and an EPON system. The OLT device comprises an EPON MAC chip used for adding matched SVLAN to field types in the frame heads of data frames after receiving the data frames transmitted from multiple ONU devices in order to differentiate the multiple ONU devices. According to the OLT device, the execution of the data frame matching and the operation of adding the SVLAN is transferred from an exchange chip on the OLT device to the EPONMAC chip such that the load of the exchange chip is relieved and the operating performance of the OLT device is enhanced. In addition, the adding operation is processed by an EPON MAC hardware chip such that speed is obviously increased compared with that of software operation.
Description
Technical field
The present invention relates to a kind of OLT equipment and EPON system, particularly relate to a kind of on EPON MAC chip for the field type in the frame head of Frame adds the SVLAN matching to distinguish OLT equipment and a kind of EPON system that comprises this OLT equipment and multiple these ONU equipment of different ONU equipment.
Background technology
According to the EPON(of China Telecom ethernet passive optical network) description in standard criterion, selective QinQ (802.1Q in 802.1Q, based on namely the network expansion of standard modifying agreements of IEEE 802.1Q agreement, on original 802.1Q message packet header, increasing again one deck 802.1Q label realizes) technology refers to EPON OLT(optical line terminal) equipment can be according to the field type in the frame head of the Frame receiving as LLID(logical links mark), CVLAN(user's VLAN), a field in EtherType(Ether frame, be used for indicating the agreement that is applied to frame data field), CVLAN priority, MAC Address (hardware address), the agreement interconnecting between IP(network) various field such as address and protocol port number completes and adds outer SVLAN(business VLAN), the ONU(optical network unit of different user) business data flow that sends of equipment is when the OLT equipment, OLT equipment adds different SVLAN to different business data flows, distinguish different users to reach, the object of different business.
And the common realization of present selective QinQ technology is all that respective rule is set on the exchange chip of OLT equipment, matched data frame, then carry out Update Table frame by software operation, this method can increase the burden of exchange chip greatly when a lot of and Frame is very many user, can have influence on the operating efficiency of exchange chip, thereby also just reduce the performance of OLT equipment.
Summary of the invention
The technical problem to be solved in the present invention is to be all to realize on the exchange chip of OLT equipment in order to overcome selective QinQ technology in prior art, cause increasing the burden of exchange chip, reduced the defect of the performance of OLT equipment, provide a kind of on EPON MAC chip for the field type in the frame head of Frame adds the SVLAN matching to distinguish OLT equipment and a kind of EPON system that comprises this OLT equipment and multiple these ONU equipment of different ONU equipment.
The present invention solves above-mentioned technical problem by following technical proposals:
The invention provides a kind of OLT equipment, it comprises an EPON MAC chip, its feature is, this EPON MAC chip is for receiving after the Frame being sent by multiple ONU equipment, for the field type in the frame head of Frame adds the SVLAN matching, so that the plurality of ONU equipment is distinguished.
Wherein, by programming on this EPON MAC chip, set up regular collection, the Frame receiving according to rule-based filtering, finding out the legal Frame that meets rule feature, to the Frame operation of modifying, is that the field type in the frame head of Frame adds SVLAN, thereby just can distinguish the different ONU equipment of different user, and then also just realize selective QinQ.
And compared with traditional implementation, the operation of the coupling of Frame and interpolation SVLAN is transferred to EPON MAC chip from the exchange chip of OLT equipment to be carried out, just alleviate the burden of exchange chip, and adding operation is by the processing of EPON MAC hardware chip, compare software operation, can significantly improve speed.
Preferably, the field type in this frame head comprises one or more in LLID, CVLAN, EtherType, CVLAN priority, MAC Address, IP address and protocol port number.
The present invention also provides a kind of EPON system, and its feature is, it comprises an above-mentioned OLT equipment and multiple above-mentioned ONU equipment.
Positive progressive effect of the present invention is: the present invention is transferred to EPON MAC chip by the operation of the coupling of Frame and interpolation SVLAN from the exchange chip of OLT equipment and carries out, just alleviate the burden of exchange chip, promote the service behaviour of OLT equipment, and adding operation is by the processing of EPON MAC hardware chip, compare software operation, can significantly improve speed.
Accompanying drawing explanation
Fig. 1 is the structure chart of the OLT equipment of a preferred embodiment of the present invention.
Fig. 2 is the flow chart of the EPON system of a preferred embodiment of the present invention.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
As shown in Figure 1, OLT equipment of the present invention comprises an EPON MAC chip 1, and this EPONMAC chip 1 also comprises a selective QinQ module 11 and a Lookup engine module 12.
Just can first programme by this EPON MAC chip 1 and selective QinQ module 11 wherein, set up regular collection, concrete operations are the input instruction that first this selective QinQ module 11 can receive user, user can input data frame field type and the corresponding parameter value of frame head, this selective QinQ module 11 can be resolved user's input, and construct corresponding rule according to corresponding parameter, and the grammatical form of rule can adopt: if(rule statements is set up) do(rule action).
For example, if user wishes based on CVLAN(0x64) value interpolation SVLAN(0x3e8), user can input corresponding parameters C VLAN, 0x64, SVLAN, 0x3e8.And this selective QinQ module 11 just can be constructed as follows rule receiving after parameter:
Up direction: if(CVLAN0==064) do(AddVLAN Tag)
Down direction: if(CVLAN1==064) do(Delete VLAN Tag)
Up direction is wherein the direction that from ONU equipment, Frame is sent to OLT equipment, and down direction is the direction that from OLT equipment, Frame is sent to ONU equipment.And Add VLAN Tag represents to add outer layer label, Delete VLAN Tag represents to delete outer layer label, and the known technology that these all belong to this area, just repeats no more at this.This rule also just represent when the value of CVLAN in the frame head of the Frame that ONU equipment is uploaded be 64(hexadecimal) time, add value be 3e8(hexadecimal) SVLAN, and in the time that Frame is sent to ONU equipment by OLT equipment, if the value of CVLAN is 64(hexadecimal in the frame head of Frame), the SVLAN adding is deleted.
Equally, if user wishes based on EtherType(0x8808) value interpolation SVLAN(0x3e8), user can input corresponding parameter EtherType, 0x8808, SVLAN, 0x3e8.And this selective QinQ module 11 just can be constructed as follows rule receiving after parameter:
Up direction: if(EtherType==8808) do(Add VLAN Tag)
Down direction: if(EtherType==8808) do(Delete VLAN Tag)
This rule also just represent when the value of EtherType in the frame head of the Frame that ONU equipment is uploaded be 8808(hexadecimal) time, add value be 3e8(hexadecimal) SVLAN, and in the time that Frame is sent to ONU equipment by OLT equipment, if the value of EtherType is 8808(hexadecimal in the frame head of Frame), the SVLAN adding is deleted.
Equally, if user wishes to add SVLAN(0x3e8 based on MAC Address (0x001122334455) value), user can input corresponding parameter MAC, 0x001122334455, SVLAN, 0x3e8.And this selective QinQ module 11 just can be constructed as follows rule receiving after parameter:
Up direction: if(Destination MAC==001122334455) do(Add VLAN Tag)
Down direction: if(Source MAC==001122334455) do(Delete VLAN Tag)
This rule also just represent when the value of destination-mac address in the frame head of the Frame that ONU equipment is uploaded be 1122334455(hexadecimal) time, add value be 3e8(hexadecimal) SVLAN, and in the time that Frame is sent to ONU equipment by OLT equipment, if the value of source MAC is 1122334455(hexadecimal in the frame head of Frame), the SVLAN adding is deleted.
And in specific embodiment of the invention process, the Frame generally sending for multiple ONU equipment, user can just can distinguish accordingly by some field types, certainly, for remaining field type, user only need to input corresponding parameter, also can construct corresponding rule with reference to above-mentioned description, the known technology that this all belongs to this area, just repeats no more at this.
By programming on this EPON MAC chip 1, set up regular collection, the Frame receiving according to rule-based filtering, find out the legal Frame that meets rule feature, to the Frame operation of modifying, for the field type in the frame head of Frame adds SVLAN, thereby just can distinguish the different ONU equipment of different user, and then also just realize selective QinQ.
And compared with traditional implementation, the operation of the coupling of Frame and interpolation SVLAN is transferred to EPON MAC chip from the exchange chip of OLT equipment to be carried out, just alleviate the burden of exchange chip, and adding operation is by the processing of EPON MAC hardware chip, compare software operation, can significantly improve speed.
And after rule has been set up, this selective QinQ module 11 just forms rule operating data bag, by socket(socket) communications is to this EPON MAC chip 1, this EPON MAC chip 1 just can parse rule after receiving packet, then rule is write to this Lookup engine module 12, and then complete selective QinQ operation by this Lookup engine module 12.
And in instantiation, rule statements can be selected according to field the list item of this Lookup engine module 12 of this EPON MAC chip 1 inside, these list items can pre-define by specific purpose tool, the implication of list item is the frame head of the Frame receiving, according to 64bit(bit) be unit division level, every one deck is operated and is selected matching field by bitmask, and the value of rule statements is assigned to the corresponding field of corresponding list item.Like this, in the time that Frame passes through this Lookup engine module 12, this Lookup engine module 12 will be verified Frame according to corresponding list item and field value, in the time that Frame meets rule match field, this Lookup engine module 12 will be according to rule action to the Frame operation of modifying, and retouching operation comprises and adds SVLAN and delete SVLAN.
Like this, just can realize selective QinQ by the operation of Frame being added to SVLAN, and then also just can realize the object that multi-user's multi-service is distinguished.
As shown in Figure 2, the object of the invention is to also protect a kind of EPON system, it comprises an above-mentioned OLT equipment and multiple above-mentioned ONU equipment, also comprises that one is arranged at the light/combiner device between OLT equipment and ONU equipment simultaneously.
Although more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited by appended claims.Those skilled in the art is not deviating under the prerequisite of principle of the present invention and essence, can make various changes or modifications to these execution modes, but these changes and modification all fall into protection scope of the present invention.
Claims (3)
1. an OLT equipment, it comprises an EPON MAC chip, it is characterized in that, this EPONMAC chip is for receiving after the Frame being sent by multiple ONU equipment, for the field type in the frame head of Frame adds the SVLAN matching, so that the plurality of ONU equipment is distinguished.
2. OLT equipment as claimed in claim 1, is characterized in that, the field type in this frame head comprises one or more in LLID, CVLAN, EtherType, CVLAN priority, MAC Address, IP address and protocol port number.
3. an EPON system, is characterized in that, it comprises the ONU equipment in an OLT equipment as claimed in claim 1 and multiple claim 1.
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| CN201210413779.0A CN103780982B (en) | 2012-10-25 | 2012-10-25 | Olt device and epon system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104202229A (en) * | 2014-09-13 | 2014-12-10 | 潍坊学院 | Method and system for processing passive optical network (PON) optical line terminal (OLT) equipment QINQ messages |
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| US20040109450A1 (en) * | 2002-11-27 | 2004-06-10 | Kang Ho Yong | Communication apparatus in ethernet passive optical network |
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| CN103780982B (en) | 2018-03-27 |
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Effective date of registration: 20201123 Address after: 221700 4-1-110-shop, Nanyuan new town, Fengxian County, Xuzhou City, Jiangsu Province Patentee after: Song Yixiao Address before: Songjiang District shihudong Town Tower Road 201617 min 579 Lane Shanghai No. -26 Patentee before: Phicomm (Shanghai) Co.,Ltd. |