CN101335685A - Method implementing priority process of special packet by redirecting technique - Google Patents
Method implementing priority process of special packet by redirecting technique Download PDFInfo
- Publication number
- CN101335685A CN101335685A CNA2007100427810A CN200710042781A CN101335685A CN 101335685 A CN101335685 A CN 101335685A CN A2007100427810 A CNA2007100427810 A CN A2007100427810A CN 200710042781 A CN200710042781 A CN 200710042781A CN 101335685 A CN101335685 A CN 101335685A
- Authority
- CN
- China
- Prior art keywords
- message
- redirected
- ply
- cpu
- yarn drill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a method for realizing the priority processing of a specific message by utilizing a redirection technique. The method refers to a message processing system applied to a high-end exchanger of the Ethernet. When redirection rules are established, the method carries out data extraction to attribute fields, such as target MAC address, IP protocol type and port number in a specific protocol message, which are related to by an exchanger when data is processed, and writes the attribute fields into the menu item of an exchanging chip of a line card; the exchanging chip of the line card carries out automatic redirection to the protocol message according to the redirection rules; therefore, when the message is processed, the line card automatically transmits the specific protocol message to a main control board at high speed by an HG. After adopting the method, when the line card is impacted by messages of large flow, the exchanger still can ensure that: 1. the STP state of the port of the exchanger can be kept stably; 2. OSPF neighbors can be maintained, and route can be updated normally; 3. BGP neighbors can be maintained, and the route can updated normally.
Description
Technical field:
The present invention relates to the ethernet communication field in the data communication, particularly a kind of method of utilizing redirecting technique to realize the special packet priority treatment.
Background technology:
The S8500 of BDCom family ethernet high-end switch is a three-tier switch from function, has all exchanges of three-tier switch and routing function concurrently, and has more powerful handling capacity.From physical structure, S8500 series is different with the switch product that generally uses at present: present product is uniprocessor equipment mostly, whole software runs on the single processor, various chips etc. directly connect with processor by bus, and processor can be operated chip by addressing; S8500 series belongs to multiprocessor machine, except that master control borad has processor, processor is separately arranged also on each ply-yarn drill, and the chip on every ply-yarn drill can only be linked to each other by internal network between the ply-yarn drill by processor operations separately.
In new physical structure, software architecture also will change: need the software image of independent operating on each processor, need to carry out in some way data and control between the processor synchronously.For the ease of the operating physical chip, part software will be moved on the ply-yarn drill and be moved; In order to make full use of the ply-yarn drill processor, accelerate system handles speed, part software will move on master control borad, will copy to for information about on the ply-yarn drill simultaneously, be convenient to the ply-yarn drill quick checking.
In a such distribution switch system, management for convenience, the informational needs master control borad of some control aspect carries out centralized calculation to be handled.STP protocol status, routing neighbor such as port are set up and maintenance routing update etc.
STP, agreements such as OSPF and BGP between switch and router all the message by particular type communicate.Usually, protocol massages can at first be handled by ply-yarn drill after arriving the S8500 series of switch, and ply-yarn drill CPU receives message, and then is transmitted to master control borad.But, impact at a large number of services message under the situation of ply-yarn drill, if these messages are forwarded to master control borad after still being received by ply-yarn drill CPU, will inevitably can not guarantee to E-Packet smoothly owing to the restriction of ply-yarn drill CPU disposal ability.
Summary of the invention:
The purpose of this invention is to provide a kind of method of utilizing redirecting technique to realize the special packet priority treatment.This method utilizes redirecting technique to make some special packet handle by the CPU that HG directly delivers to master control borad, and do not need as in the past, to handle the CPU that is transmitted to master control borad again through ply-yarn drill CPU earlier, so improve the message processing speed, saved corresponding system resources.
Specify this technical scheme below:
A kind of method of utilizing redirecting technique to realize the special packet priority treatment, this method is a kind of message-handling processor system that is applied on the Ethernet high-end switch; It is characterized in that, described method is when creating redirected rule, switch these feature field of target MAC (Media Access Control) address, IP protocol type and port numbers in the related specific protocol message when the data processing are carried out data extract, and these feature field are write in the function list item of exchange chip of ply-yarn drill; The ply-yarn drill exchange chip carries out being redirected automatically to protocol massages according to above-mentioned redirected rule, and ply-yarn drill was forwarded to master control borad with the certain protocol message at a high speed by HG automatically when message was handled like this.
In the said method, described being redirected when being provided with, in order to guarantee that the port stp state keeps stable, extract the feature field of destination-mac address (01-80-C2-00-00-00) as the STP protocol massages, the destination interface that is redirected is defined as master control borad CPU, makes the message of all MAC Address couplings will be redirected to master control borad CPU processing.
In the said method, described being redirected when being provided with, in order to keep ospf neighbor, the correct route of upgrading, extracting the Ethernet type of message is IP (0x0800), IP protocol number is that OSPF (89) is feature field, and the destination interface that is redirected is defined as master control borad CPU, and all OSPF messages will be redirected to MSU CPU processing like this.
In the said method, described being redirected when being provided with, in order to keep bgp neighbor, the correct route of upgrading, extracting destination-mac address is the switch system MAC Address, the Ethernet type of message is IP (0x0800), IP protocol number is TCP (6), TCP source or destination slogan are that BGP port (179) is feature field, and the destination interface that is redirected is defined as master control borad CPU, and all BGP messages will be redirected to MSU CPU processing like this.
In the said method, described being redirected when being provided with, at following situation: the exchange chip of ply-yarn drill can think that the STP protocol massages is that acquiescence needs the control message of handling and be sent to ply-yarn drill CPU to handle, the ip multicast message also can be sent to ply-yarn drill CPU for various reasons, and the BGP message can be arrived ply-yarn drill CPU by default route owing to be that target is three layers of unicast message of system CPU; After having enabled above-mentioned redirection function, also must abandon these and deliver to the message that ply-yarn drill CPU handles on the ply-yarn drill.
In the said method, described redirected setting is all finished on ply-yarn drill, and the system on the master control borad does not need to make any modification.
Adopt the redirecting technique plan of establishment of handling at special packet provided by the present invention, for the switch of this method of use, when ply-yarn drill is impacted by big flow message, still can guarantee:
1. the stp state of switch ports themselves can keep stable: Spanning-Tree Protocol need regularly receive BPDU and keep the stable of protocol status, the BPDU of STP is redirected to master control by ply-yarn drill and receives, under the situation of big flow, can not lose message yet, the agreement vibration takes place with regard to not occurring because of message dropping in STP like this, also can avoid the communication disruption that causes because vibration takes place STP.
2.OSPF neighbours can keep, route can normally be upgraded: ospf protocol needs regularly to keep routing neighbor by transmitting-receiving Keepalive message, and then keeps the stable of route.OSPF is redirected to master control and receives, and also can not lose message under the situation of big flow, can guarantee that the neighbours of OSPF are stable, and then keep route stable.The route flapping that can occur causing not because losing message.
3.BGP neighbours can keep, route can normally be upgraded: bgp protocol needs regularly to keep routing neighbor by the transmitting-receiving message, and then keeps the stable of route.BGP is redirected to master control and receives, and also can not lose message under the situation of big flow, can guarantee that the neighbours of BGP are stable, and then keep route stable.The route flapping that can occur causing not because losing message.
Description of drawings:
Further specify the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is the working model schematic diagram of present high-end Ethernet switch before using redirecting technique proposed by the invention.
Fig. 2 has used the redirecting technique scheme working model schematic diagram afterwards at special packet proposed by the invention.
Fig. 3 is for adopting the flow chart that switch master control borad and ply-yarn drill are handled message after the inventive method.The flow process of expression ply-yarn drill in the frame on the left side among the figure, the flow process of expression master control borad in the frame on the right
Embodiment:
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
As shown in Figure 1, this is the working model of present high-end Ethernet switch before using redirecting technique proposed by the invention.The service message of external equipment and STP, OSPF, protocol massages such as BGP all arrive the ply-yarn drill of switch.Protocol massages need be delivered to master control borad by ply-yarn drill CPU, but because the disposal ability of CPU is limited, under the impact of a large number of services message, the part protocol massages can't normally receive, and causes agreement to be vibrated.
As shown in Figure 2, this has been to use the redirecting technique scheme working model afterwards at special packet proposed by the invention.Ply-yarn drill is forwarded to master control borad with protocol massages at a high speed by the HG port, and the CPU of master control borad can not suffer the impact of a large number of services message, therefore can normally receive these protocol massages.
Certainly, redirecting technique mentioned above need be handled the message of particular type by being redirected rule.Be redirected the establishment of rule, need to extract the feature field of specific protocol message, such as: target MAC (Media Access Control) address, IP protocol type, tcp port numbers etc. are as the adequate condition of judging these specific protocol messages.Rule need write them in the function list item of exchange chip after determining.After this, exchange chip just can carry out being redirected automatically to the certain protocol message according to rule, and this scheme does not need the participation of ply-yarn drill CPU, not occupying system resources.
In addition, master control do not need the message that is redirected is judged again, if message is (no matter whether redirection message) that needs that CPU handles, then directly delivers to CPU.But with regard to ply-yarn drill to regard to the judgment rule of particular type message redirecting, for the message of different agreement, it is regular different that redirecting technique uses:
1. in order to guarantee that the port stp state keeps stable, extract the feature field of destination-mac address (01-80-C2-00-00-00) as the STP protocol massages, the destination interface that is redirected is defined as master control borad CPU, and the message of all MAC Address couplings will be redirected to MSU CPU processing like this;
2. in order to keep ospf neighbor, the correct route of upgrading, extracting the Ethernet type of message is IP (0x0800), IP protocol number is that OSPF (89) is feature field, the destination interface that is redirected is defined as master control borad CPU, and all OSPF messages will be redirected to MSU CPU processing like this;
3. in order to keep bgp neighbor, the correct route of upgrading, extracting destination-mac address is the switch system MAC Address, the Ethernet type of message is IP (0x0800), IP protocol number is TCP (6), TCP source or destination slogan are that BGP port (179) is feature field, and the destination interface that is redirected is defined as master control borad CPU, and all BGP messages will be redirected to MSU CPU processing like this.
In addition, because the exchange chip of switch can think that the STP protocol massages is the control message that acquiescence needs processing, can be sent to ply-yarn drill CPU handles, the ip multicast message also can be sent to CPU for various reasons, and the BGP message is owing to be that target is three layers of unicast message of system CPU, can be by default route to CPU, thus on the ply-yarn drill after having enabled above-mentioned redirection function, also must abandon these and deliver to the message that ply-yarn drill CPU handles.
Above-mentioned all these technology are provided with, and all finish on ply-yarn drill, and the system on the master control borad does not need to make any modification.
After adopting above-mentioned technology to be provided with, switch the direct two layers of CPU that exchanges to master control borad of specific protocol message, rather than is delivered to ply-yarn drill CPU earlier when data processing, send to the CPU of master control borad again by ply-yarn drill CPU.Because it is less that the quantity of these protocol massages compares, the CPU of master control can in time handle fully, so just can guarantee that these protocol massages are in time handled.
As shown in Figure 3, this is to adopt the flow process that switch master control borad and ply-yarn drill are handled message after the inventive method.Ply-yarn drill is after service port receives message, the exchange chip of ply-yarn drill is at first according to this message of rule judgment of having preserved needs re-orientation processes whether, suppose that the message of receiving is STP-BPDU, ospf protocol message or bgp protocol message, ply-yarn drill at first resends message to master control borad by the HG port that connects master control, and then cancels the transmission of this message to local cpu.If the message of receiving is common service message, ply-yarn drill just carries out business to this message and transmits or deliver to local cpu.
Master control borad receives after the message that ply-yarn drill is redirected-this message needs CPU to handle.Just message being delivered to local CPU handles.
Technical term related in the specification of the present invention is explained:
VLAN--Virtual LAN, VLAN, the switching network of logical partitioning.
STP--Spanning Tree Protocol, Spanning-Tree Protocol.The network that is used for the complexity formed at bridge or switch is set up simple, two tree-shaped etale topologies.STP passes through specific Layer 2 Multicast message communication between different switches.
OSPF--Open Shortest Path First is based on the IGRP of Link State.OSPF comes the state of advertised network interface by specific message between router.
BGP--Border Gateway Protocol, outside network management protocol a kind of is used for transmitting routing iinformation between autonomous territory.Message by particular type between the bgp router communicates.
The MSU--master control borad is in the ply-yarn drill of master control position in system, have the running of the whole system of coordination, control ply-yarn drill function and preserve functions such as configuration.
The LineCard--ply-yarn drill is in the ply-yarn drill of subordinate position in system, be mainly used in the IO of system control.
HG--HiGig?Port。The port of interconnection and bearer service between the ply-yarn drill.Business transferring is that exchange chip is independent of ply-yarn drill CPU and finishes on the HG port.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (6)
1, a kind of method of utilizing redirecting technique to realize the special packet priority treatment, this method is a kind of message-handling processor system that is applied on the Ethernet high-end switch; It is characterized in that, described method is when creating redirected rule, switch these feature field of target MAC (Media Access Control) address, IP protocol type and port numbers in the related specific protocol message when the data processing are carried out data extract, and these feature field are write in the function list item of exchange chip of ply-yarn drill; The ply-yarn drill exchange chip carries out being redirected automatically to protocol massages according to above-mentioned redirected rule, and ply-yarn drill was forwarded to master control borad with the certain protocol message at a high speed by HG automatically when message was handled like this.
2, realize the method for special packet priority treatment according to the redirecting technique that utilizes of claim 1, it is characterized in that, described being redirected when being provided with, in order to guarantee that the port stp state keeps stable, extract the feature field of destination-mac address (01-80-C2-00-00-00) as the STP protocol massages, the destination interface that is redirected is defined as master control borad CPU, makes the message of all MAC Address couplings will be redirected to master control borad CPU processing.
3, realize the method for special packet priority treatment according to the redirecting technique that utilizes of claim 1, it is characterized in that, described being redirected when being provided with, in order to keep ospf neighbor, the correct route of upgrading, extracting the Ethernet type of message is IP (0x0800), IP protocol number is that OSPF (89) is feature field, the destination interface that is redirected is defined as master control borad CPU, and all OSPF messages will be redirected to MSU CPU processing like this.
4, realize the method for special packet priority treatment according to the redirecting technique that utilizes of claim 1, it is characterized in that, described being redirected when being provided with, in order to keep bgp neighbor, the correct route of upgrading, extracting destination-mac address is the switch system MAC Address, the Ethernet type of message is IP (0x0800), IP protocol number is TCP (6), TCP source or destination slogan are that BGP port (179) is feature field, the destination interface that is redirected is defined as master control borad CPU, and all BGP messages will be redirected to MSU CPU processing like this.
5, realize the method for special packet priority treatment according to the redirecting technique that utilizes of claim 1, it is characterized in that, described being redirected when being provided with, at following situation: the exchange chip of ply-yarn drill can think that the STP protocol massages is that acquiescence needs the control message of handling and be sent to ply-yarn drill CPU to handle, the ip multicast message also can be sent to ply-yarn drill CPU for various reasons, and the BGP message can be arrived ply-yarn drill CPU by default route owing to be that target is three layers of unicast message of system CPU; After having enabled above-mentioned redirection function, also must abandon these and deliver to the message that ply-yarn drill CPU handles on the ply-yarn drill.
6, realize the method for special packet priority treatment according to the redirecting technique that utilizes of claim 1, it is characterized in that described redirected setting is all finished on ply-yarn drill, the system on the master control borad does not need to make any modification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100427810A CN101335685B (en) | 2007-06-27 | 2007-06-27 | Method implementing priority process of special packet by redirecting technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100427810A CN101335685B (en) | 2007-06-27 | 2007-06-27 | Method implementing priority process of special packet by redirecting technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101335685A true CN101335685A (en) | 2008-12-31 |
| CN101335685B CN101335685B (en) | 2012-03-07 |
Family
ID=40198011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100427810A Expired - Fee Related CN101335685B (en) | 2007-06-27 | 2007-06-27 | Method implementing priority process of special packet by redirecting technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101335685B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102307137A (en) * | 2011-07-13 | 2012-01-04 | 北京星网锐捷网络技术有限公司 | Method and device for transmitting and receiving management message, stacked switchboard and switchboard system |
| CN102438028A (en) * | 2012-01-19 | 2012-05-02 | 神州数码网络(北京)有限公司 | Method, device and system for preventing fraud of dynamic host configuration protocol (DHCP) server |
| CN102546431A (en) * | 2012-02-08 | 2012-07-04 | 神州数码网络(北京)有限公司 | Secure access method, system and device for router advertisements |
| CN102546658A (en) * | 2012-02-20 | 2012-07-04 | 神州数码网络(北京)有限公司 | Method and system for preventing address resolution protocol (ARP) gateway spoofing |
| CN103392317A (en) * | 2010-10-28 | 2013-11-13 | 康帕斯电子光学系统有限公司 | Router and switch architecture |
| CN103780630A (en) * | 2014-02-18 | 2014-05-07 | 迈普通信技术股份有限公司 | Method and system for isolating ports of virtual local area network |
| WO2015000329A1 (en) * | 2013-07-03 | 2015-01-08 | Hangzhou H3C Technologies Co., Ltd. | Interoperation of switch line card and programmable line card |
| CN104320322A (en) * | 2014-10-31 | 2015-01-28 | 杭州华三通信技术有限公司 | Message control method and equipment |
| CN107026796A (en) * | 2016-02-01 | 2017-08-08 | 华为技术有限公司 | A kind of VPN route advertising methods, stream compression forwarding method and relevant device |
| CN108809864A (en) * | 2018-06-15 | 2018-11-13 | 中国电子科技集团公司第四十研究所 | A kind of multi-thread card high density TAP interchangers based on FPGA |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297106C (en) * | 2003-04-15 | 2007-01-24 | 华为技术有限公司 | Method of isolating user's ports of Ethernet exchanger |
| CN100407689C (en) * | 2004-01-17 | 2008-07-30 | 华为技术有限公司 | GGSN/PDSN device and its data forwarding method |
-
2007
- 2007-06-27 CN CN2007100427810A patent/CN101335685B/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9363173B2 (en) | 2010-10-28 | 2016-06-07 | Compass Electro Optical Systems Ltd. | Router and switch architecture |
| CN103392317A (en) * | 2010-10-28 | 2013-11-13 | 康帕斯电子光学系统有限公司 | Router and switch architecture |
| CN103392317B (en) * | 2010-10-28 | 2016-06-08 | 康帕斯电子光学系统有限公司 | Router and exchange board structure |
| CN102307137A (en) * | 2011-07-13 | 2012-01-04 | 北京星网锐捷网络技术有限公司 | Method and device for transmitting and receiving management message, stacked switchboard and switchboard system |
| CN102307137B (en) * | 2011-07-13 | 2014-06-04 | 北京星网锐捷网络技术有限公司 | Method and device for transmitting and receiving management message, stacked switchboard and switchboard system |
| CN102438028A (en) * | 2012-01-19 | 2012-05-02 | 神州数码网络(北京)有限公司 | Method, device and system for preventing fraud of dynamic host configuration protocol (DHCP) server |
| CN102546431A (en) * | 2012-02-08 | 2012-07-04 | 神州数码网络(北京)有限公司 | Secure access method, system and device for router advertisements |
| CN102546658A (en) * | 2012-02-20 | 2012-07-04 | 神州数码网络(北京)有限公司 | Method and system for preventing address resolution protocol (ARP) gateway spoofing |
| US9692716B2 (en) * | 2013-07-03 | 2017-06-27 | Hewlett Packard Enterprise Development Lp | Interoperation of switch line card and programmable line card |
| US20160112348A1 (en) * | 2013-07-03 | 2016-04-21 | Hangzhou H3C Technologies Co., Ltd. | Interoperation of switch line card and programmable line card |
| WO2015000329A1 (en) * | 2013-07-03 | 2015-01-08 | Hangzhou H3C Technologies Co., Ltd. | Interoperation of switch line card and programmable line card |
| CN103780630A (en) * | 2014-02-18 | 2014-05-07 | 迈普通信技术股份有限公司 | Method and system for isolating ports of virtual local area network |
| CN104320322A (en) * | 2014-10-31 | 2015-01-28 | 杭州华三通信技术有限公司 | Message control method and equipment |
| CN107026796A (en) * | 2016-02-01 | 2017-08-08 | 华为技术有限公司 | A kind of VPN route advertising methods, stream compression forwarding method and relevant device |
| CN108809864A (en) * | 2018-06-15 | 2018-11-13 | 中国电子科技集团公司第四十研究所 | A kind of multi-thread card high density TAP interchangers based on FPGA |
| CN108809864B (en) * | 2018-06-15 | 2020-09-01 | 中国电子科技集团公司第四十一研究所 | Multi-line card high-density TAP switch based on FPGA |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101335685B (en) | 2012-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101335685B (en) | Method implementing priority process of special packet by redirecting technique | |
| EP2057788B1 (en) | Multi-chassis emulated switch | |
| CN101601232B (en) | Triple-tier anycast addressing | |
| CN103081418B (en) | Computer system and communication method in computer system | |
| CN106936777A (en) | Cloud computing distributed network implementation method based on OpenFlow, system | |
| US7792124B2 (en) | Data forwarding in a layer three satellite network | |
| CN102843286B (en) | Implementation method, and system of virtual routers | |
| CN108574616A (en) | A kind of method, equipment and the system of processing routing | |
| US20120320929A9 (en) | Packet forwarding using multiple stacked chassis | |
| CN101268662A (en) | Router and method for protocol process migration | |
| CN104869058A (en) | Method and device for transmitting data message | |
| CA2555545A1 (en) | Interface bundles in virtual network devices | |
| CN103329469A (en) | Method of shrinking a data loss window in a packet network device | |
| US20110299551A1 (en) | Method and Apparatus for Transferring Data Packets Between a First Network and a Second Network | |
| JP2017511069A5 (en) | ||
| CN101257447A (en) | Method, system and routing apparatus of load sharing | |
| CN105871718A (en) | SDN (Software-Defined Networking) inter-domain routing implementation method | |
| CN102957619A (en) | Virtual routing system and method | |
| CN107566237A (en) | A kind of data message processing method and device | |
| CN104168209A (en) | Multi-access SDN message forwarding method and controller | |
| CN103200117A (en) | Method and device of load balancing | |
| US20140172949A1 (en) | Method of inter-board communication in a router cluster, router, and router cluster | |
| CN103457862A (en) | Three-layer multicast achieving method in software longitudinal stacking system and equipment | |
| CN104363185B (en) | A kind of miniature composite network data exchange system | |
| CN101312439A (en) | Flexible IP gateway protecting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120307 Termination date: 20210627 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |