CN111083073B - Interface extension method of Ethernet switch equipment - Google Patents
Interface extension method of Ethernet switch equipment Download PDFInfo
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- CN111083073B CN111083073B CN201911412371.XA CN201911412371A CN111083073B CN 111083073 B CN111083073 B CN 111083073B CN 201911412371 A CN201911412371 A CN 201911412371A CN 111083073 B CN111083073 B CN 111083073B
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- 238000004891 communication Methods 0.000 claims description 17
- 238000004148 unit process Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000005538 encapsulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/45—Arrangements for providing or supporting expansion
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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
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
- H04L49/354—Switches specially adapted for specific applications for supporting virtual local area networks [VLAN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/40—Constructional details, e.g. power supply, mechanical construction or backplane
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Abstract
The invention discloses an interface extension method of Ethernet exchanger equipment, which arranges interface extension units on a main control panel and a branch panel, processes data received and transmitted by the main control panel and the branch panel through the interface extension units, and comprises the following steps: step 1, caching and receiving a complete data frame; step 2, adding an identification tag at least containing a port number to the received data frame; step 3, combining a plurality of data frames added with identification labels, and sending the data frames to a master control panel through a high-speed interface; step 4, performing field matching on the unpacked data frames of the master control panel to obtain port numbers contained in the identification tags carried by the data frames, and sending the data frames to the branch panel; and 5, if the corresponding port number is checked to be allowed to be used, writing the processed data frame into the corresponding sending buffer area according to the checked port number. The method increases the user ports under the condition of not influencing the wiring of the back plate; the board card is simple in design and supports flexible expansion; and fast main/standby switching is supported.
Description
Technical Field
The invention relates to the technical field of networks, in particular to an interface extension method of Ethernet switch equipment.
Background
A general PTN (Packet Transport Network) device or IP RAN device includes: the main control panel is in communication connection with each branch circuit board through the back panel.
However, each branch circuit board usually needs more interfaces, so that the back board is used for connecting each branch circuit board and the main control board and ensuring normal data exchange, and the number of the interfaces of each branch circuit board corresponds to that of the routing, thereby resulting in complex routing. As shown in fig. 1, a technical solution provided in the prior art is that the back board performs routing according to the number of interfaces of the branch circuit board, for example, the branch circuit board has 10 1G interfaces, and the back board needs 10 groups of high-speed routing and is in communication connection with the main control board through 10 groups of high-speed routing. This has the disadvantage that: (1) the back plate has complex routing and more PCB layers; (2) the interface of the master control disk switch chip is wasted.
Disclosure of Invention
Based on the problems existing in the prior art, the invention aims to provide an interface extension method for an ethernet switch device, which can solve the problems that in the existing ethernet switch device, the backplane routing is complicated, the number of layers of PCBs is large, and the interface of a main control panel switch chip is wasted due to the scheme that a plurality of routing lines of the backplane realize the connection of each branch circuit panel and the main control panel.
The purpose of the invention is realized by the following technical scheme:
the embodiment of the invention provides a 1, interface extension method of Ethernet switch equipment, used for the Ethernet switch equipment comprising a plurality of branch disks connected with a main control disk through a backboard, each branch disk is connected with the main control disk through a high-speed interface of the backboard in a communication way, characterized in that, each branch disk and the main control disk are provided with an interface extension unit, the interface extension unit sets a corresponding receiving buffer area and a corresponding sending buffer area for each interface of each branch disk, the interface extension unit processes the data transmitted and received by each branch disk and the main control disk, comprising:
and 5, unpacking the data packet forwarded by the main control disk through the high-speed interface by the corresponding branch disk, performing field matching on the unpacked data packet to obtain an interface number which is contained in an outlet identification label carried by the data packet and corresponds to the outlet interface, and sending the data packet to a corresponding sending buffer area of the corresponding interface of the corresponding branch disk with the confirmed interface number.
As can be seen from the above technical solutions provided by the present invention, the interface extension method for ethernet switch equipment implemented by the FPGA according to the embodiment of the present invention has the following beneficial effects:
the interface expansion method can distinguish different data frames by adding the identification tag at least comprising the port number, realizes the expansion of a high-speed interface into a plurality of sub-interfaces, and increases user ports under the condition of not influencing the wiring of a back plate; the board card is simple in design and supports flexible expansion; and fast main/standby switching is supported.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating connection between a main control panel and a multi-interface branch panel through multiple lines on a backplane in an ethernet switch device according to an example of the prior art.
Fig. 2 is a schematic structural diagram of an ethernet switch device to which the interface extension method according to the embodiment of the present invention is applied;
fig. 3 is a flowchart of an interface expansion method according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a configuration of an interface expansion unit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a portal identification tag according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating a structure of a custom field according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the specific contents of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
Referring to fig. 2 and 3, an embodiment of the present invention provides an interface extension method for an ethernet switch device, where the method is used for an ethernet switch device that includes a plurality of tributary disks connected to a main control disk via a backplane, each tributary disk is in communication connection with the main control disk via a high-speed interface of the backplane, an interface extension unit is disposed on each tributary disk and the main control disk, the interface extension unit sets a corresponding receiving buffer area and a corresponding sending buffer area for each interface of each tributary disk, and the interface extension unit processes data received and sent by each tributary disk and the main control disk, and the method includes:
and 5, unpacking the data packet forwarded by the main control disk through the high-speed interface by the corresponding branch disk, performing field matching on the unpacked data packet to obtain an interface number which is contained in an outlet identification label carried by the data packet and corresponds to the outlet interface, and sending the data packet to a corresponding sending buffer area of the corresponding interface of the corresponding branch disk with the confirmed interface number.
The branch disc corresponding to the step 4 may be another branch disc, such as a branch disc two, or may be the original branch disc one, and the outlet interface corresponds to another interface of the branch disc one.
In step 1 of the above method, receiving a buffered data packet from a receiving buffer corresponding to a certain interface of the first tributary disk is: and sequentially receiving data packets from the receiving buffer areas corresponding to the interfaces of the first branch disk in a polling mode.
In step 2 of the above method, determining the entry identification tag to be added as follows according to the interface number of the data packet received in step 1:
and determining the entry identification tag to be added by searching a preset entry area, wherein the entry area comprises the entry identification tag of which type each interface number should be added.
In step 4 of the above method, after the adding the egress identification tag to the data packet, the method further includes:
and removing the entry identification label of the data packet, and then forwarding the data packet to the high-speed interface of the main control panel connected with the branch panel II.
Referring to fig. 4, the interface extension unit in the above method includes:
the system comprises a data receiving module, a plurality of receiving buffers, an inlet label adding module, an outlet label adding module, a label matching module, a data sending module and a plurality of sending buffers; wherein,
the data receiving module is respectively in communication connection with the receiving buffer areas corresponding to the interfaces of the branch disc, can receive the cached data packet from the receiving buffer area corresponding to a certain interface of the branch disc, and adds the interface number corresponding to the used interface to the received data packet;
the entry tag adding module is in communication connection with the data receiving module, and can determine an entry identification tag to be added according to an interface number of a data packet received by the data receiving module, remove the interface number of the data packet, and add the entry identification tag at least containing the interface number to the data packet;
the outlet label adding module can perform label exchange and data packet exchange operations after the main control panel receives a data packet, and after an outlet interface of the data packet is determined according to a preset forwarding rule, encapsulate an interface number of a branch panel interface corresponding to the outlet interface of the data packet to a corresponding outlet identification label, add the outlet identification label to the data packet, and then forward the data packet to a high-speed interface of a branch panel corresponding to the main control panel;
the label matching module is in communication connection with the outlet label adding module, and is used for performing field matching on the unpacked data packet to obtain an interface number, corresponding to an outlet interface, contained in an outlet identification label carried by the data packet;
the data sending module is in communication connection with the label matching module and the sending buffer areas corresponding to the interfaces of the branch disc respectively, and can send the data packets with the interface numbers confirmed by the label matching module to the corresponding sending buffer areas of the corresponding interfaces of the corresponding branch disc with the confirmed interface numbers.
Preferably, the data receiving module, the multiple receiving buffers, the entry tag adding module, the tag matching module, the data sending module and the multiple sending buffers of the interface extension unit are all disposed on the branch disk; the export label adds the module and sets up in the master control dish.
The interface extension unit further includes: the system comprises a receiving buffer arbitration module and a label stripping module;
the receiving buffer arbitration module is in communication connection between the data receiving module and the entry tag adding module, and can receive frame length information sent by the data receiving module, and when the data receiving module does not read the data packet in time and the receiving buffer area receives a new data packet, the receiving buffer arbitration module adds 1 to the count of the remaining packets, and after the data receiving module finishes reading the data packet, the receiving buffer arbitration module subtracts 1 from the counter of the remaining packets;
the label stripping module is in communication connection with the outlet label adding module and can remove the inlet identification label of the data packet.
Preferably, the receiving buffer arbitration module is disposed on the branch board; the label stripping module is arranged on the main control panel.
The interface extension unit adopts a programmable control unit.
In the method, the interface extension unit adopts a programmable control unit. For example, the interface extension unit can be a programmable control unit realized by an FPGA.
The method realizes the expansion of the high-speed interface of the Ethernet switch equipment through the programmable control unit, realizes the application of expanding the high-speed back panel into a plurality of low-speed interfaces, supports the functions of multi-service Encapsulation (EOS) and port OAM/SLA, utilizes the sub-interface technology of the switch, realizes the label search and replacement, the main and standby detection switching and realizes the multi-service encapsulation form.
The embodiments of the present invention are described in further detail below.
The interface extension method of the Ethernet switch equipment provided by the embodiment of the invention is mainly used for the Ethernet switch equipment with a plurality of branch disks connected with a main control disk through a back plate, each branch disk is connected with the main control disk through a high-speed interface of the back plate (see figure 2), and the method can extend one high-speed interface of the back plate into a plurality of sub-interfaces without arranging a plurality of wires on the back plate; specifically, interface extension units are arranged on a plurality of branch disks and a main control disk, the structure of the interface extension unit is shown in fig. 4, the interface extension unit sets a corresponding receiving buffer area and a corresponding sending buffer area for each interface of each branch disk, and the processing flow of each module of the interface extension unit is as follows:
and 5, unpacking the data packet forwarded by the main control panel through the high-speed interface by the branch panel II, performing field matching on the unpacked data packet to obtain an interface number which is contained in an outlet identification label carried by the data packet and corresponds to an outlet interface, and sending the data packet to a corresponding sending buffer area of a corresponding interface of the branch panel II corresponding to the confirmed interface number.
Further, the interface extension unit further includes an entry area, and a space of the entry area is defined as:
| | Tag | 4 | Custom operation | 2 |
| 0 | Custom tag value | Whether or not to perform tag addition or subtraction operation | ||
| 1 | ||||
| N |
By defining the table entry area, whether the entry needs to be added with the label or not is confirmed according to the interface number, and which type of entry identification label is added, and the table entry area can be flexibly configured, so that the design is more flexible. It can be known that the above-mentioned table entry area can modify the corresponding field according to the need, and can implement flexible support of protocols such as VLAN/MPLS by setting the table entry area.
The interface expansion method of the invention can provide a plurality of interfaces for users by the branch circuit board without increasing the wiring of the back board, thereby increasing the user tree; the board card is simple in design and supports flexible expansion; the method also does not affect the rapid main-standby switching.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. An interface extension method of Ethernet switch equipment is used for the Ethernet switch equipment comprising a plurality of branch disks connected with a main control disk through a back plate, each branch disk is in communication connection with the main control disk through a high-speed interface of the back plate, and is characterized in that an interface extension unit is arranged on each branch disk and the main control disk, the interface extension unit is provided with a corresponding receiving buffer area and a corresponding sending buffer area for each interface of each branch disk, the interface extension unit processes data transmitted and received by each branch disk and the main control disk, and the interface extension unit comprises: the system comprises a data receiving module, a plurality of receiving buffers, an inlet label adding module, an outlet label adding module, a label matching module, a data sending module and a plurality of sending buffers; the data receiving module is respectively in communication connection with the receiving buffer areas corresponding to the interfaces of the branch disc, can receive the cached data packet from the receiving buffer area corresponding to a certain interface of the branch disc, and adds the interface number corresponding to the used interface to the received data packet;
the entry tag adding module is in communication connection with the data receiving module, and can determine an entry identification tag to be added according to an interface number of a data packet received by the data receiving module, remove the interface number of the data packet, and add the entry identification tag at least containing the interface number to the data packet;
the outlet label adding module can perform label exchange and data packet exchange operations after the main control panel receives a data packet, and after an outlet interface of the data packet is determined according to a preset forwarding rule, encapsulate an interface number of a branch panel interface corresponding to the outlet interface of the data packet to a corresponding outlet identification label, add the outlet identification label to the data packet, and then forward the data packet to a high-speed interface of a branch panel corresponding to the main control panel;
the label matching module is in communication connection with the outlet label adding module, and is used for performing field matching on the unpacked data packet to obtain an interface number, corresponding to an outlet interface, contained in an outlet identification label carried by the data packet;
the data sending module is in communication connection with the label matching module and the sending buffer areas corresponding to the interfaces of the branch disc respectively, and can send the data packets with the interface numbers confirmed by the label matching module to the corresponding sending buffer areas of the corresponding interfaces of the corresponding branch disc with the confirmed interface numbers; the method comprises the following steps:
step 1, receiving a cached data packet from a receiving buffer area corresponding to a certain interface of a branch disk I, and adding an interface number corresponding to the used interface for the received data packet;
step 2, determining an entry identification label to be added according to the interface number of the data packet received in the step 1, removing the interface number of the data packet, and adding the entry identification label at least comprising the interface number to the data packet;
step 3, sending the data packet added with the entrance identification label to the main control panel through a high-speed interface connected with the main control panel and the branch panel;
step 4, after receiving the data packet, the master control panel performs label switching and data packet switching operations, and determines the output interface of the data packet according to a preset forwarding rule, then encapsulates the interface number of the branch panel interface corresponding to the output interface of the data packet to the corresponding outlet identification label, adds the outlet identification label to the data packet, and then forwards the data packet to the high-speed interface of the branch panel corresponding to the master control panel connection;
and 5, unpacking the data packet forwarded by the main control disk through the high-speed interface by the corresponding branch disk, performing field matching on the unpacked data packet to obtain an interface number which is contained in an outlet identification label carried by the data packet and corresponds to the outlet interface, and sending the data packet to a corresponding sending buffer area of the corresponding interface of the corresponding branch disk with the confirmed interface number.
2. The method according to claim 1, wherein in step 1 of the method, the step of receiving the buffered data packet from the receiving buffer corresponding to a certain interface of the tributary disk one includes: and sequentially receiving data packets from the receiving buffer areas corresponding to the interfaces of the first branch disk in a polling mode.
3. The interface extension method of an ethernet switch device according to claim 1, wherein in step 2 of the method, it is determined according to the interface number of the packet received in step 1 that the entry identification tag to be added is:
and determining the entry identification tag to be added by searching a preset entry area, wherein the entry area comprises the entry identification tag of which type each interface number should be added.
4. The method according to any one of claims 1 to 3, wherein in step 4 of the method, after the adding the egress identification tag to the packet, the method further comprises:
and removing the entry identification label of the data packet, and then forwarding the data packet to the high-speed interface of the main control panel connected with the corresponding branch panel.
5. The interface extension method of an ethernet switch device according to claim 1, wherein the interface extension unit further comprises:
the system comprises a receiving buffer arbitration module and a label stripping module; wherein,
the receiving buffer arbitration module is in communication connection between the data receiving module and the entry tag adding module, can receive frame length information sent by the data receiving module, and adds 1 to the count of the remaining packets when the data receiving module does not read the data packet in time and the receiving buffer area receives a new data packet, and subtracts 1 from the counter of the remaining packets after the data receiving module finishes reading the data packet;
the label stripping module is in communication connection with the outlet label adding module and can remove the inlet identification label of the data packet.
6. The interface extension method for ethernet switch equipment according to claim 3, wherein said interface extension unit employs a programmable control unit.
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| KR100503422B1 (en) * | 2003-06-13 | 2005-07-22 | 한국전자통신연구원 | Ethernet switch, apparatus for expanding the port and method therefor |
| CN100561981C (en) * | 2006-10-10 | 2009-11-18 | 杭州华三通信技术有限公司 | Multiprotocol label switching retransmission method and forwarding unit |
| CN100508500C (en) * | 2006-10-26 | 2009-07-01 | 杭州华三通信技术有限公司 | Interplate communicating method and interface plate |
| CN101459602B (en) * | 2008-11-28 | 2012-02-29 | 烽火通信科技股份有限公司 | Apparatus and method for transmitting management and control information in packet transmission network |
| US8358597B2 (en) * | 2009-10-01 | 2013-01-22 | Hei Tao Fung | Method for building scalable Ethernet switch network and huge Ethernet switch |
| CN102033581B (en) * | 2009-12-18 | 2012-05-30 | 中国科学院声学研究所 | A Highly Expandable ATCA Board Based on Multi-core Network Processor |
| CN101741664A (en) * | 2009-12-21 | 2010-06-16 | 中兴通讯股份有限公司 | Realization method and device of Ethernet interface system |
| CN102457426B (en) * | 2010-10-25 | 2014-07-09 | 深圳中兴力维技术有限公司 | Convergent type Ethernet over plesiochronous digital hierarchy (EoPDH) network bridge equipment and data transmission method thereof |
| CN102497308B (en) * | 2011-11-30 | 2014-08-27 | 福建星网锐捷网络有限公司 | Multiple slot switch |
| CN103248874B (en) * | 2013-05-09 | 2015-09-30 | 武汉烽火众智数字技术有限责任公司 | Job site wireless portable data acquiring and transmission system headend equipment |
| CN104158768B (en) * | 2014-07-01 | 2018-05-04 | 汉柏科技有限公司 | A kind of method and system of extended network interface, the method for receiving and dispatching message |
| CN106209689B (en) * | 2015-05-04 | 2019-06-14 | 新华三技术有限公司 | Multicast data packet forwarding method and apparatus from VXLAN to VLAN |
| CN205265697U (en) * | 2015-12-28 | 2016-05-25 | 许昌许继昌南通信设备有限公司 | Grouping optical transmission terminal chip based on tag switching |
| CN107147577A (en) * | 2017-05-04 | 2017-09-08 | 北京邮电大学 | A data forwarding method and system based on software-defined network SDN |
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Denomination of invention: An Interface Expansion Method for Ethernet Switch Devices Effective date of registration: 20230407 Granted publication date: 20220311 Pledgee: Zhongguancun Beijing technology financing Company limited by guarantee Pledgor: Beijing Huahuan Electronics Co.,Ltd. Registration number: Y2023990000211 |