WO2018218887A1

WO2018218887A1 - Over-disk lacp link aggregation method and device for pon access system

Info

Publication number: WO2018218887A1
Application number: PCT/CN2017/111563
Authority: WO
Inventors: 张显峰; 黄勇
Original assignee: 烽火通信科技股份有限公司
Priority date: 2017-05-27
Filing date: 2017-11-17
Publication date: 2018-12-06
Also published as: MY195304A; CN107277652A; PH12019500594A1; CN107277652B

Abstract

Disclosed in the present invention are an over-disk LACP link aggregation method and device for a PON access system, relating to the field of link aggregation. The steps of said method are: a main control disk creating a link aggregation group, and adding the link aggregation group to a designated VLAN; the main control disk controlling aggregation group member ports on all line cards to interact LACP messages with a peer device; the main control disk determining all ports which have completed LACP message negotiation to be normal ports, and forming aggregation group table entries according to the port numbers of all the normal ports, the main control disk and all the line cards saving the aggregation group table entries; and when the operating states of the ports on the line cards change, the main control disk updating the aggregation group table entries according to port change information. In cases where the centralized architecture of the PON access system is not changed, the present invention can extend the uplink disk function of an Ethernet-type single disk, and increase the uplink link bandwidth, and thus significantly improve the reliability of the link.

Description

Cross-platform LACP link aggregation method and device for PON access system

Technical field

The present invention relates to the field of link aggregation, and in particular, to a cross-platform LACP link aggregation method and apparatus for a PON access system.

Background technique

LA (Link Aggregation) is a technology that bundles multiple physical ports into one logical port. This technology can treat multiple physical connections as a single logical connection, allowing two network devices to Parallel connection through multiple ports to achieve simultaneous transmission of data, provide higher bandwidth and throughput, and increase the stability of the system. Link aggregation can be classified into static aggregation and dynamic aggregation based on whether the member port is running the Link Aggregation Control Protocol (LACP).

The LACP provides a standard negotiation mode for the device that exchanges data through the LACPDU (Link Aggregation Control Protocol Data Unit) and the peer exchange information. The LACP is configured according to the device port (that is, rate and duplex). , basic configuration, management key, etc.) form an aggregated link, and start the aggregation link to send and receive data. LACP link aggregation has the advantages of increasing network bandwidth, improving network connection reliability, and load-sharing traffic. With the rapid development of network communication technologies, LACP link aggregation technology is widely used in voice, data, and video services. Therefore, it is very important to ensure the normal LACP and link stability.

With the rapid development of the mobile Internet, services such as video and data are showing a rapid growth trend. PON (Passive Optical Network) access system is connected to the uplink. The bandwidth requirements are getting higher and higher. In order to meet operators' demand for P2P Ethernet access and uplink port expansion, the demand for new Ethernet type line cards is becoming more and more urgent. The new type of Ethernet line card can support a variety of ports, such as access, cascading, and uplink. It increases the bandwidth of the uplink link and improves the link connection reliability. Features have begun to be widely used in carrier networks. LACP link aggregation technology can increase bandwidth and improve uplink link reliability. It has been widely used in new Ethernet type line cards, and the demand for supporting cross-disk aggregation is increasing.

The LACP technology has been mainly focused on the implementation of the aggregation method. For example, the invention patent of the publication number CN1023B64892B provides an aggregation link switching method, and the patent is mainly applicable to a common uplink disk. Although the switch and the router support the cross-platform LACP link aggregation, the PON access system is mainly a centralized architecture and distinguishes between the user side and the uplink side because it has different system architectures than the PON access system. The LACP link aggregation of different ports on the inter-Ethernet type line card on the access system. The Ethernet type of the PON access system has a large number of line card ports, 16 ports, and has its own CPU. It can run the protocol separately and can be applied to multiple application scenarios such as cascading and uplink. In the existing network, there is no clear and specific method for how to implement LACP link aggregation on different ports on the Ethernet type line card under the PON access system.

Summary of the invention

The technical problem to be solved by the present invention is to provide a cross-platform LACP link aggregation method and apparatus for a PON access system, and the present invention can change the centralized architecture of the PON access system without changing the centralized architecture of the PON access system. The function of extending the uplink of the Ethernet type single disk increases the bandwidth of the uplink link, thereby significantly improving the reliability of the link.

To achieve the above objective, the present invention provides a cross-platform LACP link aggregation method for a PON access system, and the method includes the following steps:

S1: The main control panel creates a link aggregation group, and the designated port on each line card is added to the link aggregation group. The main control panel opens the LACP protocol switch and goes to S2.

S2: The main control panel adds the link aggregation group to the specified VLAN, and goes to S3.

S3: When a member port of the link aggregation group on the master control panel sends an LACP packet, the LACP packet is encapsulated into a master-slave communication packet, and the master-slave communication packet is sent to the line card corresponding to the port. After the LACP packet is received, the LACP packet is sent to the peer device for processing.

After receiving the LACP packet sent by the peer device, the line card encapsulates the LACP packet as the master-slave communication packet and sends it to the master control disk. The master control disk resolves the master-slave communication packet to obtain the LACP packet. After processing the LACP packet, go to S4;

S4: The main control panel determines that all the ports that complete the LACP packet negotiation are normal ports. The main control disk forms an aggregation group entry based on the port numbers of all normal ports and sends them to all line cards. The main control disk and all line cards are saved. Aggregate the group entry and go to S5.

S5: When the working status of the port on the line card is changed, the main control disk refreshes the aggregation group entry according to the port change information, and then sends the updated aggregation group entry to all line cards, the main control panel and all line cards. The refreshed aggregation group entries are saved.

The cross-platform LACP link aggregation device of the PON access system for implementing the foregoing method includes a main control panel and at least two line cards of different Ethernet types, and a CPU is respectively disposed on the main control panel and each line card. And the switch chip, the CPU of the main control panel includes a configuration module, a bridge module, and an LACP protocol processing module, the CPU of the line card includes a line card bridge module and an LACP protocol adaptation layer, and the LACP protocol processing module further includes an LACP protocol state machine;

The configuration module is used to: create a link aggregation group, add a designated port on each line card in the link aggregation group, open the LACP protocol switch of the main control panel, and send a VLAN add signal to the bridge module.

The switch chip of the main control disk is used to: save the link aggregation group created by the configuration module. Specifies the aggregation group entry delivered by the specified VLAN and the LACP processing module.

The bridge module of the main control panel is configured to: after receiving the VLAN add signal, add the link aggregation group to the specified VLAN, send the aggregation group to the VLAN success signal to all the switch chips of the line card; when the link on the main control panel When the member port of the aggregation group sends an LACP packet, the LACP packet is encapsulated into a master-slave communication packet, and the master-slave communication packet is sent to the CPU of the line card corresponding to the port.

The CPU of the line card is used to: after the LACP packet is obtained, the LACP packet is sent to the switch chip of the line card; the LACP packet received from the line card port is encapsulated as the master-slave communication packet, and then sent to the master. Control panel

The switch chip of the line card is used to: save the aggregation group entry delivered by the LACP processing module; after receiving the success message of the aggregation group, the LACP packet is sent to the peer device; the received LACP packet is sent. To the CPU of the main control panel;

The CPU of the main control disk is configured to: after parsing the master-slave communication packet to obtain the LACP packet, send the LACP packet to the LACP protocol processing module;

The LACP processing module is configured to: process the LACP packet, and determine that all the ports that complete the LACP packet negotiation are normal ports, and the aggregation group entry is formed according to the port number of all the normal ports, and the aggregation group entry is delivered to the master. Switch chip for all disks and all line cards;

After receiving the port change information reported by the state machine of the LACP, the port is updated according to the port change information, and the updated aggregation group entry is sent to the switch chip of the main control disk and all line cards.

The LACP protocol state machine is used to: when the working state of the port of the line card is changed, the port change information is reported to the LACP protocol processing module, and the port change information includes the port number and the port change status, and the port change status includes normal abnormality. Or the exception becomes normal.

The advantages of the present invention over the prior art are:

Referring to the S1 to S5 of the present invention, the present invention can collectively manage the ports on different line cards through the main control panel and maintain the aggregation port of the LACP link, which not only solves the problem that different ports on different Ethernet type line cards cannot be located. The problem of other port events is perceived, and the problem of cross-disk LACP aggregation on the Ethernet type line card in the PON system is solved, which is an extension of the LACP link aggregation of the common uplink port. Therefore, the present invention expands the uplink disk function of the Ethernet type single disk without changing the centralized architecture of the PON access system, increases the bandwidth of the uplink link, and thus significantly improves the reliability of the link.

DRAWINGS

1 is a flowchart of a method for a cross-platform LACP link aggregation in a PON access system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a method for a cross-platform LACP link aggregation in a PON access system according to an embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

The PON access system in the embodiment of the present invention includes a main control panel and at least two line cards of different Ethernet types. Referring to FIG. 1 , the cross-platform LACP link aggregation of the PON access system in the embodiment of the present invention is performed. The method includes the following steps:

S1: Create a link aggregation group on the master control panel, set the link aggregation group mode to LACP static aggregation, add the designated port on each line card in the link aggregation group, and turn the LACP protocol switch on the main control disk. Go to S2.

As shown in FIG. 2, the line card in the embodiment of the present invention is two: a 3-slot line card and a 13-slot line card, and the ports on the 3-slot line card are 3:12, 3:16; 13 slots. The ports on the line card are 13:5, 13:8.

S2: The master control panel adds the link aggregation group to the specified VLAN (VLAN 100 in this embodiment). The specific process is as follows: After the master control panel adds the link aggregation group to the specified VLAN, the aggregation group is added to the VLAN. The information is sent to each line card; the line card adds the link aggregation group to the specified VLAN and goes to S3.

S3: The member interface of the link aggregation group on the main control panel sends the LACP packet (the LACP packet is sent periodically), and the LACP packet is encapsulated into the master-slave communication packet. The master-slave communication packet is used by the proprietary protocol. The line card is sent to the corresponding line card. After the line card resolves the master-slave communication packet to obtain the LACP packet, the line card sends the LACP packet to the peer device for processing.

After the available port of the line card receives the LACP packet from the peer device, the line card encapsulates the LACP packet as the master-slave communication packet and sends it to the master control disk. The master control disk resolves the master-slave communication packet to obtain the LACP packet. Then, process the LACP packet and go to S4.

S4: The main control panel determines that all the ports that complete the LACP packet negotiation are normal ports. The port that completes the LACP packet negotiation is the port that can receive and send LACP packets. The LACP packets sent by the master control disk are forwarded to the port. The peer device forwards the LACP packets sent by the peer device to the master control disk. The main control disk forms an aggregation group entry based on the port numbers of all the normal ports and sends them to all line cards. The main control disk and all line cards save the aggregation group entries, so that the information about the specific ports can be known and managed. Go to S5. .

The specific process for the main control panel to refresh the aggregation group entry according to the port change information in S5 is: when the abnormality of the normal port becomes an abnormal port, the port number of the abnormal port in the aggregation group entry is removed; when the abnormal port becomes On a normal port, add the port number of the normal port to the aggregation group entry.

The multiplexer of the PON access system implementing the above method provided by the embodiment of the present invention The LACP link aggregation device includes a main control panel and at least two line cards of different Ethernet types. The main control panel and each line card are respectively provided with a CPU and a switch chip, and the CPU of the main control panel includes a configuration. Module, bridge module, LACP protocol processing module, line card CPU includes line card bridge module and LACP protocol adaptation layer, LACP protocol processing module also includes LACP protocol state machine.

The configuration module is used to create a link aggregation group, set the link aggregation group mode to LACP static aggregation, add the designated port on each line card in the link aggregation group, and open the LACP protocol switch on the main control disk. The bridge module sends a VLAN add signal.

The switch chip of the master control panel is used to save the specified VLANs added by the link aggregation group created by the configuration module and the aggregation group entries delivered by the LACP processing module.

The line card in the embodiment of the present invention is two: a 3-slot bit line card and a 13-slot line line card, and the port on the 3-slot bit line card is 3:12, 3:16; the port on the 13-slot line card is 13:5, 13:8.

The bridge module of the main control panel is configured to: after receiving the VLAN add signal, add the link aggregation group to the specified VLAN (VLAN 100 in this embodiment), and send the aggregation group to the VLAN of all line card exchange chips. The signal is sent to the CPU of the line card corresponding to the port. The LACP packet is encapsulated into a master-slave communication packet, and the master-slave communication packet is sent to the CPU of the line card corresponding to the port.

The process of adding the link aggregation group to the specified VLAN is as follows: After the link aggregation group is added to the specified VLAN, the information about adding the aggregation group to the VLAN is sent to each line card. The card adds the link aggregation group to the specified VLAN.

The CPU of the line card is used to: after the LACP packet is obtained, the LACP packet is sent to the switch chip of the line card; the LACP packet received from the line card port is encapsulated as the master-slave communication packet, and then sent to the master. Control panel.

The LACP protocol adaptation layer is used to add and delete the member ports of the aggregation group on the line card.

The switch chip of the line card is used to: save the aggregation group table delivered by the LACP protocol processing module. The LACP packet is sent to the peer device; the received LACP packet is sent to the CPU of the master control panel.

The CPU of the main control disk is configured to: After parsing the master-slave communication packet to obtain the LACP packet, send the LACP packet to the LACP protocol processing module.

The LACP protocol processing module is used to:

(1) The LACP packet is processed to determine that the port that completes the LACP packet negotiation is a normal port. The port that performs the LACP packet negotiation is the port that can receive and send LACP packets. An aggregation group entry is generated based on the port number of all the normal ports. The aggregation group entry is delivered to the switch chip of the main control disk and all line cards.

(2) After receiving the port change information reported by the state machine of the LACP, the interface of the aggregation group is refreshed according to the port change information, and the updated aggregation group entry is sent to the switch chip of the main control disk and all line cards.

The specific process of the LACP protocol processing module to refresh the aggregation group entry according to the port change information is: when the abnormality of the normal port becomes an abnormal port, the port number of the abnormal port in the aggregation group entry is removed; when the abnormal port becomes normal Add the port number of the normal port to the aggregation group entry.

Further, the present invention is not limited to the above embodiments, and those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. These improvements and refinements are also considered as the present invention. Within the scope of protection. The contents not described in detail in the present specification belong to the prior art well known to those skilled in the art.

Claims

A cross-platform LACP link aggregation method for a PON access system, wherein the PON access system includes a main control panel and at least two line cards of different Ethernet types, and the method includes the following steps:

S1: The main control panel creates a link aggregation group, and the designated port on each line card is added to the link aggregation group. The main control panel opens the LACP protocol switch and goes to S2.

S2: The main control panel adds the link aggregation group to the specified VLAN, and goes to S3.

S3: When a member port of the link aggregation group on the master control panel sends an LACP packet, the LACP packet is encapsulated into a master-slave communication packet, and the master-slave communication packet is sent to the line card corresponding to the port. After the LACP packet is received, the LACP packet is sent to the peer device for processing.

After receiving the LACP packet sent by the peer device, the line card encapsulates the LACP packet as the master-slave communication packet and sends it to the master control disk. The master control disk resolves the master-slave communication packet to obtain the LACP packet. After processing the LACP packet, go to S4;

S4: The main control panel determines that all the ports that complete the LACP packet negotiation are normal ports. The main control disk forms an aggregation group entry based on the port numbers of all normal ports and sends them to all line cards. The main control disk and all line cards are saved. Aggregate the group entry and go to S5.

S5: When the working status of the port on the line card is changed, the main control disk refreshes the aggregation group entry according to the port change information, and then sends the updated aggregation group entry to all line cards, the main control panel and all line cards. The refreshed aggregation group entries are saved.
The cross-platform LACP link aggregation method of the PON access system of claim 1, wherein after the link control group is created in the S1, the following steps are further included: the mode of the link aggregation group Set to LACP static aggregation.
The cross-platform LACP link aggregation method of the PON access system of claim 1, wherein the specific process of the S2 includes: adding, by the main control disk, the link aggregation group to After the specified VLAN is added, the information about adding the aggregation group to the VLAN is sent to each line card. The line card adds the link aggregation group to the specified VLAN.
The cross-platform LACP link aggregation method of the PON access system of claim 1, wherein the port for completing the LACP packet negotiation in S4 is: a port capable of receiving and transmitting LACP packets.
The cross-platform LACP link aggregation method of the PON access system of claim 1, wherein the specific process of the main control panel for refreshing the aggregation group entry according to the port change information in the S5 includes: when an abnormality occurs in the normal port When the port becomes an abnormal port, the port number of the abnormal port is removed from the aggregation group entry. When the abnormal port becomes a normal port, the port number of the normal port is added to the aggregation group entry.
A cross-platform LACP link aggregation device for implementing a PON access system according to any one of claims 1 to 5, comprising a main control panel and at least two line cards of different Ethernet types, a main control panel and each block The CPU card and the switch chip are respectively disposed on the line card, and the CPU of the main control board includes a configuration module, a bridge module, and an LACP protocol processing module. The CPU of the line card includes a line card bridge module, and the LACP protocol processing module further includes an LACP protocol. state machine;

The configuration module is used to: create a link aggregation group, add a designated port on each line card in the link aggregation group, open the LACP protocol switch of the main control panel, and send a VLAN add signal to the bridge module.

The switch chip of the main control disk is used to: save the specified VLAN added by the link aggregation group created by the configuration module, and the aggregation group entry delivered by the LACP processing module;

The bridge module of the main control panel is configured to: after receiving the VLAN add signal, add the link aggregation group to the specified VLAN, send the aggregation group to the VLAN success signal to all the switch chips of the line card; when the link on the main control panel When an aggregation group member port sends an LACP packet, the LACP packet is encapsulated into a master-slave communication packet, and the master-slave communication packet is sent to the port. The CPU of the corresponding line card;

The CPU of the line card is used to: after the LACP packet is obtained, the LACP packet is sent to the switch chip of the line card; the LACP packet received from the line card port is encapsulated as the master-slave communication packet, and then sent to the master. Control panel

The switch chip of the line card is used to: save the aggregation group entry delivered by the LACP processing module; after receiving the success message of the aggregation group, the LACP packet is sent to the peer device; the received LACP packet is sent. To the CPU of the main control panel;

The CPU of the main control disk is configured to: after parsing the master-slave communication packet to obtain the LACP packet, send the LACP packet to the LACP protocol processing module;

The LACP processing module is configured to: process the LACP packet, and determine that all the ports that complete the LACP packet negotiation are normal ports, and the aggregation group entry is formed according to the port number of all the normal ports, and the aggregation group entry is delivered to the master. Switch chip for all disks and all line cards;

After receiving the port change information reported by the state machine of the LACP, the port is updated according to the port change information, and the updated aggregation group entry is sent to the switch chip of the main control disk and all line cards.

The LACP protocol state machine is used to: when the working state of the port of the line card is changed, the port change information is reported to the LACP protocol processing module, and the port change information includes the port number and the port change status, and the port change status includes normal abnormality. Or the exception becomes normal.
The cross-platform LACP link aggregation device of the PON access system of claim 6, wherein after the configuration module creates a link aggregation group, the configuration module further sets the mode of the link aggregation group to LACP static. polymerization.
The cross-platform LACP link aggregation device of the PON access system of claim 6, wherein the specific process of adding the link aggregation group to the designated VLAN by the bridge module of the main control panel includes: After the aggregation group is added to the specified VLAN, The information added to the VLAN by the aggregation group is sent to each line card. The line card adds the link aggregation group to the specified VLAN.

The master VLAN add module sends the master-slave communication message to all line cards according to the VLAN number. The master VLAN add module controls all line cards to add all ports on the line card to the specified VLAN according to the VLAN number.
The cross-platform LACP link aggregation device of the PON access system of claim 6, wherein the normal port determined by the LACP protocol processing module is a port capable of receiving and transmitting LACP packets.
The cross-platform LACP link aggregation device of the PON access system of claim 6, wherein the specific process of the LACP protocol processing module for refreshing the aggregation group entry according to the port change information includes: when the normal port is abnormally changed If the port is abnormal, remove the port number of the abnormal port in the aggregation group entry. When the abnormal port becomes a normal port, add the port number of the normal port to the aggregation group entry.