CN102347960B

CN102347960B - Method for realizing remote login by using network redirection

Info

Publication number: CN102347960B
Application number: CN201110373496.3A
Authority: CN
Inventors: 胡小波; 董贤伟
Original assignee: Fiberhome Telecommunication Technologies Co Ltd
Current assignee: Fiberhome Telecommunication Technologies Co Ltd
Priority date: 2011-11-22
Filing date: 2011-11-22
Publication date: 2015-02-04
Anticipated expiration: 2031-11-22
Also published as: CN102347960A

Abstract

The invention relates to a method for realizing remote login by using network redirection, comprising the steps of: starting a Server 3000 on a GNE (Gateway Network Element); building a TCP (Transmission Control Protocol) connection between a WS (Webmaster Station) and the Server 3000 of the GNE; directly issuing a client Telnet remote login connection request to a Server 23 of an NE (Network Element) to be logined by the GNE after the TCP connection is built; and after the Telnet remote login connection request of the Telnet client of the GNE is success, when the Server 3000 of the GNE receives data, transmitting the data intactly to the Server 23 of the NE to be logined, and when the Telnet client of the GNE receives data, transmitting the data intactly to the WS. According to the method provided by the invention, NEs in other transport networks and bearing networks, except the GNE, can be login in a Telnet remote login manner by using the network redirection method, therefore, the problems in engineering are convenient to search and position, engineers do not need to examine the sites of the problems, and the labor power, material resources, financial resources and time are saved.

Description

A kind of method using network redirection to realize Telnet

Technical field

The present invention relates to the network element Telnet telnet technical field of transmission and bearer network, is a kind of method using network redirection to realize Telnet specifically.Network redirection is espespecially used to realize the method for the network element Telnet Telnet of transmission and bearer network.

Background technology

In Practical Project networking (network shown in Figure 1), such a case can be run into: network management workstation WS is connected with Data Communication Network, and the transmission that DCN and the network equipments such as SDH (Synchronous Digital Hierarchy) SDH, Packet Transport Network PTN, optical transfer network OTN form is connected with bearer network.In general, DCN is the intranet adopting IP protocol construction.Due to transmit and agreement that equipment in bearer network runs and the agreement of DCN online operation probably different, between them just cannot exchanging routing information with carry out intercommunication.So just WS and transmit and bearer network separated.WS just cannot monitor the network element NE in transmission and bearer network.

In order to tackle this situation, so propose the concept of Gateway Network Element GNE, Gateway Network Element GNE is a kind of special NE.Such as, in SDH equipment network, we can using the NE transmitted and be directly connected with DCN in bearer network as GNE, at DCN on the net to its distribution IP address.Meanwhile, also distribute an IP address to WS on the net at DCN.Now WS just can have been connected by DCN net and GNE.And other NE in GNE and transmission and bearer network was also intercommunication originally, so using GNE as a transfer person, can forward the management information between other NE and WS.By GNE mode, WS can monitor the NE in transmission and bearer network, webmaster on namely usually said NE.

The upper webmaster of NE mainly realizes the functions such as alarm management, performance management, configuration management and safety management.These information are very important for monitoring network.But in some cases, NE there will be trustship phenomenon, cause WS cannot obtain the associated monitoring information of this trustship NE.At this moment, NE trustship problem is searched with regard to needing by the mode of Telnet Telnet.

For general transmission and bearer network, can by the routing iinformation between network, sign in trustship NE or it closes on NE and carries out trouble-shoots.But for said that internetwork connection mode above, WS can only be remotely logged into GNE by Telnet, and cannot sign in GNE other NE below.This brings very large difficulty to searching problem.

Summary of the invention

For the defect existed in prior art, the object of the present invention is to provide a kind of method using network redirection to realize Telnet, solve in GNE networking, cannot Telnet be remotely logged into except GNE other transmit and the problem of NE in bearer network.

For reaching above object, the technical scheme that the present invention takes is:

Use network redirection to realize a method for Telnet, it is characterized in that, its concrete steps are as follows:

The first step, confirms that WS can be remotely logged into GNE by Telnet;

Second step, on GNE, the TCP server Server3000 of a startup listening port 3000, described TCP server Server 3000 are for receiving the data of WS, and this data retransmission to the NE needing to log in;

3rd step, the TCP first setting up the Server3000 of WS with GNE by input telnet command from WS is connected,

After this connection establishment success, because itself can start the TCP server Server 23 of a listening port 23 automatically after each NE runs, so GNE initiates directly to needing the NE logged in the client Telnet Telnet connection request that a port is 23, after the connection request success of the telnet client Telnet Telnet of GNE, GNE just can simultaneously with WS and need the NE logged in set up TCP to be connected, here just TCP connection has been established by the Telnet of standard, first connect because Telnet will establish TCP, then could set up Telnet to connect, now:

The Server 3000 of GNE receives data and is just transmitted to intact for these data the Server 23 needing the NE logged in; And the telnet client of GNE receives data, just give WS data retransmission; So far, by the middle forwarding capability of GNE, WS and need to log in and established transparent TCP between NE and connect;

4th step, according to Telnet agreement, WS and need to log between NE and carry out the negotiation of some options then, has just established Telnet connection between them, just can carry out command interaction;

5th step, if need to exit Telnet Telnet, perform from the command window of WS and exit command, the TCP between disconnection WS and GNE and between the NE of GNE and needs login connects.

On the basis of technique scheme, realize WS by a single-track link table and log in multiple NE simultaneously,

Network redirection chain list index List points to the chained list tail of single-track link table, and each node in chained list comprises Server data and Client data, wherein:

Server data at least comprise socket, reception data buffer storage, the data length of the Server 3000 of GNE;

Client data at least comprise socket, reception data buffer storage, the data length of the telnet client of GNE;

The socket of the Server 3000 of GNE receives data, just sent by the telnet client socket of GNE, and GNE receives data from the socket of the telnet client of GNE, just sends from the socket of the Server 3000 of GNE;

On WS, often set up a Telnet Telnet, GNE just adds a node at the afterbody of redirected chained list, exits a Telnet Telnet, just from this chained list, deletes a node by matched node pointer.

On the basis of technique scheme, when webmaster station WS is connected with the first Data Communication Network 1, the first Data Communication Network 1 is connected with the first Gateway Network Element GNE1, and the first Gateway Network Element GNE1 is connected with first, second network element NE11, NE12,

First Data Communication Network 1 is connected with the second Data Communication Network 2, second Data Communication Network 2 is connected with the second Gateway Network Element GNE2, second Gateway Network Element GNE2 is connected with the 3rd network element NE21, and when needing the NE logged in refer to the 3rd network element NE21, concrete steps are as follows:

Step one: the function starting network redirection Telnet Telnet on GNE1 and GNE2, namely starts Server 3000 server, and on GNE1, opens transfer network redirection of switches;

Step 2: after connecting with Server 3000 server of GNE1 on WS, do not start Server 23 client on GNE1, i.e. the client of Telnet server, but start Server 3000 client;

Server 3000 client of step 2: GNE1 sends TCP connection request to the Server 3000 of GNE2 again, after the success of TCP connection establishment, the telnet client of GNE2 sends Telnet connection request to the NE21 below the GNE2 needing to log in again, finally, this NE21 and WS carries out the negotiation of some Telnet parameters, just can be remotely logged into the NE21 of below GNE2 by Telnet.

Use network redirection of the present invention realizes the method for Telnet, network redirection method Telnet is used to be remotely logged into other transmission except GNE and the NE in bearer network, facilitate searching and locating of problem in engineering, make engineering staff in person need not arrive problem scene to check, save human and material resources, financial resources and time.

Accompanying drawing explanation

The present invention has following accompanying drawing:

Fig. 1 uses network redirection to realize the general principle of Telnet Telnet technology,

Fig. 2 uses network redirection to realize the realization flow of the method for Telnet Telnet,

Fig. 3 a network redirection chained list,

The method that Fig. 3 b uses network redirection to realize Telnet Telnet logs in the example of multiple NE simultaneously,

Transfer network redirection function in Fig. 4 many GNE situation realizes the method for Telnet Telnet.

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail.

The implication of the English technical term related in the present invention is as following table

The present invention is based on the thought that GNE carries out tcp data forwarding, use network redirection technology on WS, the NE do not had with WS intercommunication can be remotely logged into by Telnet.This technology is mainly used in the network of GNE networking.Espespecially in background technology and the network shown in Fig. 1.

Use network redirection of the present invention realizes the method for Telnet, and GNE starts a Server 3000; The TCP first setting up the Server 3000 of WS with GNE is connected, after success, GNE is directly to the Server 23 starting client Telnet Telnet connection request needing the NE logged in, after the connection request success of the telnet client Telnet Telnet of GNE, then: the Server 3000 of GNE receives data and is just transmitted to intact for these data the Server 23 needing the NE logged in; And the telnet client of GNE receives data, just give WS data retransmission.Its concrete steps are as follows:

The first step, confirms that WS can be remotely logged into GNE by Telnet;

Second step, GNE starts the TCP server Server3000 of a listening port 3000, described TCP server Server 3000 for receiving the data (receiving the data of Server 3000 client of WS) of WS, and this data retransmission to the NE needing login;

3rd step, the TCP first setting up the Server 3000 of WS with GNE by input telnet command (such as: Telnet GNE-IP 3000 orders) from WS is connected,

After this connection establishment success, because itself can start the TCP server Server 23 of a listening port 23 automatically after each NE runs, so GNE initiates directly to needing the NE logged in the client Telnet Telnet connection request that a port is 23, after the connection request success of telnet client (Server 23 client) the Telnet Telnet of GNE, GNE just can simultaneously with WS and need the NE logged in set up TCP to be connected, here just TCP connection has been established by the Telnet of standard, first connect because Telnet will establish TCP, then could set up Telnet to connect, now:

Fig. 1 is the description realizing principle to using network redirection to realize Telnet Telnet.The WS on the right carries out intercommunication by DCN and GNE.But WS cannot carry out intercommunication with NE1.Intercommunication is carried out for realizing WS and NE1:

GNE starts the Server 3000 of a listening port 3000.So WS can set up TCP with the Server 3000 of GNE and be connected.In addition, GNE initiates telnet client to NE1 and connects, and first will establish TCP and connect, make GNE set up TCP with WS and NE1 respectively and be connected by means of Telnet.Now, if GNE receives the data that WS sends, just NE1 is transmitted to.Equally, GNE receives the data of NE1, is just transmitted to WS.GNE is that WS and NE1 carries out data retransmission, and for WS and NE1, such forwarding is transparent, and they all think that data directly send over from the other side.Finally, the negotiation of Telnet parameter and the mutual of order is carried out between WS and NE1.This completes the function using network redirection to realize Telnet Telnet.

Fig. 2 is the description to using network redirection to realize Telnet Telnet technology realization flow.Just start, GNE can not carry out network redirection, so need first to start this function.The Telnet Telnet function realized by network redirection can be divided into three parts: the TCP establishment of connection between WS and GNE and GNE and NE1; Carry out setting up Telnet between WS and NE1 to connect, line command of going forward side by side mutual; Exit Telnet Telnet.

(1) the TCP establishment of connection between WS and GNE and GNE and NE1

GNE sets up Server 3000, listening port 3000.Then, in the command window of WS, input telnet command, set up TCP with the port 3000 of GNE and be connected.After GNE receives this bind command, carry out three-way handshake with WS and set up TCP and be connected.Then, GNE starts telnet client, and the TCP initiating Telnet to NE1 connects.The Telnet server S erver 23 of NE1 receives request, sets up TCP each other and connects.GNE respectively WS with NE1 sets up TCP and is connected, and then just can carry out data retransmission for them, make to set up transparent TCP between WS and NE1 and connect, and this transparent TCP connects by having transferred in GNE.

(2) carry out setting up Telnet between WS and NE1 to connect, line command of going forward side by side mutual

Establish transparent TCP connection between WS and NE1 after, just data interaction can be carried out.The negotiation of Telnet protocol option is carried out between them.After consulting successfully, just establish Telnet between WS and NE1 and connect.We just can carry out command interaction with NE1 by this Telnet connection above WS.

(3) Telnet Telnet is exited

If command interaction is complete between WS and NE1, want that the Telnet disconnected between them connects.Input in the command window of WS and exit command.GNE exits command this to be transmitted to NE1.NE1 and GNE holds consultation, and the TCP closing Telnet connects.Meanwhile, the Server3000 of GNE replys exiting command of WS, and the TCP consulting to close WS and GNE connects.

The present invention can realize WS and log in multiple NE simultaneously, realizes this function particular by a single-track link table.

As shown in Figure 3 a.Network redirection chain list index List points to the chained list tail of single-track link table, and each node in chained list comprises Server data and Client data, wherein:

Fig. 3 b is the example logging in many NE.The telnet client that we set GNE needs connection NE to be NE1.When we set up Telnet connection between WS and NE1, GNE has just been saved in the node Node 1 of network redirection chained list the relevant information of carrying out data retransmission between WS and NE1.If we also think to sign in NE2 simultaneously, the IP address that we need the telnet client needs resetting GNE to connect, is set to the IP address of NE2.GNE is saved to the relevant information of carrying out data retransmission between WS and NE2 in the node Node 2 in network redirection chained list.Now, we can set up Telnet with NE1 and NE2 simultaneously.

Fig. 4 is the description be redirected transfer network.

All the possibility considering to have in network a GNE above, if there is multiple GNE in network, as shown in Figure 4, when webmaster station WS is connected with the first Data Communication Network 1, first Data Communication Network 1 is connected with the first Gateway Network Element GNE1, first Gateway Network Element GNE1 is connected with first, second network element NE11, NE12

We use network redirection to realize Telnet Telnet function, can only sign in the NE below GNE1, as NE11, and pass through the connected GNE2 of another one DCN network DCN2.For the NE21 below GNE2, just cannot get on from Telnet Telnet above WS.In order to tackle this situation, need to add Server 3000 client on GNE11.

The concrete steps that transfer network is redirected are as follows:

Server 3000 client of step 2: GNE1 sends TCP connection request to the Server 3000 of GNE2 again, after the success of TCP connection establishment, that is: by the middle forwarding capability of GNE1, has established transparent TCP and connect between WS and GNE2,

Now, the telnet client of GNE2 sends Telnet connection request to the NE21 below the GNE2 needing to log in again, that is: by middle the forwarding capability of GNE2, and WS and need to log between NE21 and established transparent TCP connection,

Finally, this NE21 and WS carries out the negotiation of some Telnet parameters, just can be remotely logged into the NE21 of below GNE2 by Telnet.

This expanded function, we call that transfer network is redirected, now, we cannot be remotely logged into the NE11 below GNE1 by Telnet.Network redirection function has been transferred on GNE2, and we can be remotely logged into the NE below GNE2 by Telnet.In the diagram, the flow process be redirected at networking is shifted as follows:

1, the Server 3000 of the Server 3000 client <-of WS 1.->GNE1;

2, the Server 3000 of the Server 3000 client <-of GNE1 2.->GNE2;

3, the Server 23 of the Server 23 client <-of GNE2 3.->NE21.

Switch between being redirected at the transfer network of normal network redirection and improvement, we need to arrange a switch.Generally, this switch is cut out, and represents the network redirection of normal operation.After opening switch, run transfer network redirection function.

The content be not described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.

Claims

1. use network redirection to realize a method for Telnet, it is characterized in that, its concrete steps are as follows:

The first step, confirms that webmaster station WS can be remotely logged into Gateway Network Element GNE by Telnet;

Second step, on GNE, the TCP server Server3000 of a startup listening port 3000, described TCP server Server 3000 are for receiving the data of WS, and this data retransmission to the network element NE needing to log in;

After this connection establishment success, because itself can start the TCP server Server 23 of a listening port 23 automatically after each NE runs, so GNE initiates directly to needing the NE logged in the client Telnet Telnet connection request that a port is 23, after the connection request success of the telnet client Telnet Telnet of GNE, GNE just can simultaneously with WS and need the NE logged in set up TCP to be connected, here just TCP connection has been established by the Telnet of standard, now:

The Server 3000 of GNE receives data and is just transmitted to intact for these data the Server23 needing the NE logged in; And the telnet client of GNE receives data, just give WS data retransmission; So far, by the middle forwarding capability of GNE, WS and need to log in and established transparent TCP between NE and connect;

4th step, according to Telnet agreement, carries out the negotiation of some options between the login NE of WS and needs; Then, just established Telnet connection between them, can command interaction have been carried out;

5th step, if need to exit Telnet Telnet, perform from the command window of WS and exit command, the TCP between disconnection WS and GNE and between the NE of GNE and needs login connects;

Realize WS by a single-track link table and log in multiple NE simultaneously,

The socket of the Server3000 of GNE receives data, just sent by the telnet client socket of GNE, and GNE receives data from the socket of the telnet client of GNE, just sends from the socket of the Server 3000 of GNE;

2. the method using network redirection to realize Telnet as claimed in claim 1, it is characterized in that: when webmaster station WS is connected with the first Data Communication Network 1, first Data Communication Network 1 is connected with the first Gateway Network Element GNE1, first Gateway Network Element GNE1 is connected with first, second network element NE11, NE12

Step one: the function starting network redirection Telnet Telnet on GNE1 and GNE2, namely starts Server3000 server, and on GNE1, opens transfer network redirection of switches;

Step 2: after connecting with Server 3000 server of GNE1 on WS, do not start Server 23 client on GNE1, this Server23 client is the client of Telnet server, but start Server 3000 client;