CN210807297U

CN210807297U - Dual-unit server redundant network system

Info

Publication number: CN210807297U
Application number: CN201921649687.6U
Authority: CN
Inventors: 郑伟; 张文月; 王跃礼; 厉振波
Original assignee: 707th Research Institute of CSIC
Current assignee: 707th Research Institute of CSIC
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-06-19
Anticipated expiration: 2029-09-30

Abstract

The utility model relates to a redundant network system of two unit server, its major technical features is: the system comprises two unit servers and a network storage unit, wherein each unit server comprises two server blades, a server disk control, a time signal receiving module, a network switching module and a local storage array; the two unit servers are connected with each other through a network exchange module and are connected to an external local area network; the network storage units are respectively connected to the network switching module of each unit server. The utility model relates to a rationally, realized that carrier-borne numerical center rack externally provides application and information service function such as database, file, transmission of high performance, high reliability, have characteristics such as the real-time strong, stability is high, link switching speed is fast.

Description

Dual-unit server redundant network system

Technical Field

The utility model relates to a network interconnection technical field, in particular to redundant network system of two unit server.

Background

The ship-based numerical center as the core of the whole ship communication system puts high requirements on data processing capacity, data transmission reliability and speed, data storage safety and the like. The existing dual-computer hot backup system can meet the requirements to a certain extent, namely, a central server is installed into two servers which are backed up with each other, only one server runs at the same time, when one running server fails and cannot be started, the other backup server can be automatically started and run (generally about 2 minutes), and therefore the normal running of the whole network system is realized. The dual-computer hot backup system is difficult to meet the requirements of the carrier-based numerical center.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of above-mentioned prior art existence, provide a strong in instantaneity, stability height, link switching speed are fast and can satisfy the redundant network system of two unit server of the high-efficient communication of data link.

The utility model provides a its technical problem take following technical scheme to realize:

a dual-unit server redundant network system comprises two unit servers and a network storage unit, wherein each unit server comprises two server blades, a server disk control, a time signal receiving module, a network switching module and a local storage array; the two unit servers are connected with each other through a network exchange module and are connected to an external local area network; the network storage units are respectively connected to the network switching module of each unit server.

The network switching module is two network switches, and four ports of the two network switches are aggregated pairwise.

And the unit servers construct a dual-unit server redundant network system through a DT-Ring protocol.

The utility model has the advantages that:

1. the utility model discloses constitute by inside two unit server of rack and network storage equipment, have database service relevant storage, transmission function, realized that carrier-borne numerical center rack externally provides application and information service function such as database, file, transmission of high performance, high reliability, have characteristics such as the real-time strong, stability is high, link switching speed is fast.

2. The utility model discloses a DT-Ring agreement founds double Ring network, realizes the reliability of communication between two servers and the strong real-time nature exchange function of the redundant network of trunk, and redundancy switching time is less than 90ms, has characteristics such as redundant Ring fast convergence, trouble fast switch, maintenance convenience, can satisfy each communication field's needs better.

Drawings

FIG. 1 is a schematic diagram of the system connection of the present invention;

FIG. 2 is a normal data flow trend of the present invention;

fig. 3 is a schematic diagram of link switching according to the present invention.

Detailed Description

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

The design idea of the utility model is that: in order to meet the requirement that a double-unit server provides strong real-time and high-availability network sharing service to the outside, a double-ring network topology complete machine network link is used, four ports of two switches are respectively converged in pairs in a static aggregation mode, and the bandwidth and the protection function of a backbone network are increased; in the redundancy protection of the whole network topology, a DT-Ring protocol is adopted to realize the redundancy protection function of the whole network, and the loop network is pruned into a loop-free tree network, so that the proliferation and infinite circulation of messages in the loop network are avoided. The DT-Ring protocol realizes the rapid detection of the LIKE state of the port, and determines the states of the Ring and the port through a small protocol message, thereby ensuring that the redundant network does not form the Ring.

Based on the above design thought, the utility model discloses the redundant network system of two unit server as shown in figure 1 is found, this system uses the topological complete machine network link of double ring network, including two unit server (server A and server B) and network memory cell, every unit server all includes two server blades, the server is coiled, time system signal reception module (time system board), network switching module (two network switch) and local storage array, wherein the server is coiled accuse and is connected with local storage array and network switching module, two server blade interconnect are connected with network switching module, thereby realize the inside redundant interconnection function of unit server, guarantee the high-availability of single server intercommunication. The clock signal receiving module (clock system board) is connected with one of the server blades. The two unit servers are connected with each other through the network switching module and are connected to the external local area network. The network storage units are respectively connected to the network switching module of each unit server.

In the redundant network system, in order to increase the bandwidth and the protection function of a backbone network, four ports of two network switches are respectively converged pairwise in a static aggregation mode; in the redundancy protection of the whole network topology, a DT-Ring protocol is adopted to realize the redundancy protection function of the whole network, and the loop network is pruned into a loop-free tree network, so that the proliferation and infinite circulation of messages in the loop network are avoided. Port aggregation can treat multiple physical connections as a single logical connection, allowing techniques for connecting between two switches through multiple ports and transferring data simultaneously to provide higher bandwidth, greater throughput, and recoverability.

In the redundant network system, how to realize the reliability and the real-time performance of communication between two servers is very important for the overall performance index of the whole digital cabinet. The utility model discloses a construct the scheme that the strong real-time nature of the redundant network of trunk realizes exchanging based on DT-Ring agreement. From the application perspective, the dual ring network should have a network transmission function of various data, and forward data between each access system to ensure stable operation of each system, and the specific functions should be as follows: the network link redundancy function is provided; the single machine anti-damage function is achieved; the method has a three-layer data gateway backup function; the system has the functions of network security control, topology monitoring and network upgrading.

Fig. 2 and 3 show the operation and switching of the dual-Ring network topology using DT-Ring, and the following description will take SW1 as the master station and SW2, SW3 and SW4 as the slave stations. After the aggregation of all the connection conditions of the system links is stable, the DT-Ring protocol logically disconnects the link between SW2 and SW3, and the direction of data flow is shown in fig. 2. When the data link between the SW1 and the SW4 is broken, the link between the SW2 and the SW3 is opened rapidly, and the forwarding direction of the data stream is changed accordingly, as shown in fig. 3.

Since DT-Ring and STP/RSTP/MSTP protocols are network redundancy protocols, a node is selected from a network Ring and physically connected, a software disconnection mode ensures that no Ring occurs in the network, network storms are avoided, and when a link or equipment in the network is detected to be disconnected or closed, data can be rapidly transmitted, and the stability of the system is ensured. Except that DT-Ring is a private protocol, other network protocols are standard network protocols, and the switching time is in the second level. For example, STP switching time is about 30S, RSTP and MSTP switching time is several seconds using a standard network protocol.

The DT-Ring protocol can realize the rapid detection of the LIKE state of the port, and determine the states of the Ring and the port through a small protocol message, thereby ensuring that a redundant network does not form a Ring. When a double-Ring network based on a DT-Ring protocol is adopted, the switching time between two exchangers can be guaranteed within 50ms at the fastest speed at present, and the switching time between a terminal and the exchanger driven by a double redundant network is guaranteed within 90ms, so that the self-healing time of the whole system can reach the self-recovery time less than 90 ms.

The principle that the system meets the network real-time performance is analyzed from the technical point of view as follows:

according to the characteristics of the switched ethernet technology, the gigabit ethernet port enables ieee802.1q for real-time data, and after the real-time data passes through a network composed of N ethernet switching devices, the method for calculating the total delay time (Σ T) generated is as follows:

ΣT＝(T_S&F×N)+(T_d×N)+T_t×(N-1)

T_S&Ffor a single gigabit Ethernet switch, store and forward time for our switching device T_S&FNot more than 5 us.

T_dFor background traffic transit time in the waiting queue:

T_d＝(L_b+β)×8bit/1000000000bps

T_tend-to-end transmission time for real-time data:

T_t＝(L_t+β)×8bit/1000000000bps

wherein L is_bFor background message length, L_tThe length of the real-time message is the common message length of 64, 128, 256, 512 and 1518 bytes.

β is IPv4 frame header length, which takes 20.

The project double ring network adopts 4 switches to form the network, if the maximum transmission equipment is calculated, the maximum value of the equipment in the network is 4, and the maximum delay of 1518 byte messages is 0.02 ms. Because the maximum length of the common message in the current Ethernet is 1518 bytes, and the message delay of the length byte is the maximum, the network delay is less than or equal to 0.02 ms.

From the above analysis, the system can realize fast convergence, fast failure switching and convenient maintenance of the ethernet redundancy ring, thereby better meeting the needs of various communication fields.

The utility model discloses the nothing is mentioned the part and is applicable to prior art.

It should be emphasized that the embodiments described herein are illustrative and not restrictive, and thus the present invention includes but is not limited to the embodiments described in the detailed description, as well as other embodiments derived from the technical solutions of the present invention by those skilled in the art, which also belong to the scope of the present invention.

Claims

1. A dual-cell server redundant network system, characterized by: the system comprises two unit servers and a network storage unit, wherein each unit server comprises two server blades, a server disk control, a timing signal receiving module, a network switching module and a local storage array; the two unit servers are connected with each other through a network exchange module and are connected to an external local area network; the network storage units are respectively connected to the network switching module of each unit server.

2. The dual-cell server redundant network system of claim 1, wherein: the network switching module is two network switches, and four ports of the two network switches are aggregated pairwise.

3. The dual-cell server redundant network system of claim 1, wherein: and the unit servers construct a dual-unit server redundant network system through a DT-Ring protocol.