CN1133299C - In-band network management method based on IP protocol for ATM - Google Patents
In-band network management method based on IP protocol for ATM Download PDFInfo
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- CN1133299C CN1133299C CN 00116467 CN00116467A CN1133299C CN 1133299 C CN1133299 C CN 1133299C CN 00116467 CN00116467 CN 00116467 CN 00116467 A CN00116467 A CN 00116467A CN 1133299 C CN1133299 C CN 1133299C
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Abstract
The present invention relates to an in-band network management method based on an IP for an ATM, which comprises the following steps that ATM devices are selected to be used as gateway devices; IP addresses with the same network prefix are distributed to all the ATM devices; a network management system and all the ATM devices (except for the gateway device) set an IP address of a gateway device as a gateway; PVCs for network management are established among the ATM devices to form a control network; the network management system visits the ATM devices via the IP addresses. The present invention adopts a fact of realizing the cost of the IP protocol on the PVCs, does not increase the hardware cost of the devices, enhances the flexibility of the device network and ensures the reliable and safe transfer of network management data.
Description
Technical field
The present invention relates to the network management in the communication field, more particularly, relate to the method that the network that utilizes Internet protocol that asynchronous transmission equipment is formed manages.
Background technology
Asynchronous transfer mode (Asynchronous Transfer Mode is called for short ATM) technology is a kind of exchange and multiplex technique based on cell, and the length of its cell is fixed as 53 bytes, and wherein preceding 5 bytes are the letter head, and back 48 bytes are information byte.The user sets up virtual connection according to service needed between points, behind the information input atm device, be divided into cell and carry out aperiodic transmission.Atm device can treated side to the connecting-type business, also can handle connectionless service by adaptation layer; Its virtual connection can be runed in even bit rate service, also can run in variable bit rate service.On the other hand, ATM also belongs to the statistical time division mutiplexing mode, can dynamically distribute the bandwidth of each circuit as required, has good flexibility and effective bandwidth availability ratio.For the situation of the business that needs to support multiple different performance, quality in same network, atm device has overwhelming superiority beyond doubt.In order to guarantee the reliability service of atm device, must effectively manage atm device by network management system.
Existing network management method has two kinds of forms of Outband network management and inband network management, respectively it is introduced below.
The network management method of Outband network management form be make the equipment managed by special-purpose network insertion in network management system, application number is that 96105249 Chinese patent " with the method for telephone network or computer interconnection network management data net " has just proposed a kind of like this method.This method utilizes virtual subnet in cable telephone network, radiotelephony network or INTERNET net or the three kinds of networks as the control net, ADNET equipment, perhaps telephone exchange is linked into by data network and accepts management in the network management system, this method is used more extensive in actual networking, but for atm device, because it is to multiple services support, make atm network itself just can carry phone and data service, so a lot of local all demands that ATM network just can satisfy the user of only laying.In this case, therefore the network that atm device does not have to use uses this method to carry out network management to atm device as Control Network.
Owing in atm network, use the mode of Outband network management can have the problems referred to above, and the characteristic of utilizing atm network itself can realize being with interior network management, promptly set up the virtual connection of network management communication special use and transmit network management information, so the form of inband network management is usually adopted in the existing ATM network management.
Usually the method for inband network management is the form by the agency, utilize an atm device that can be linked into network management system as agent equipment, at agent equipment with acted on behalf of and set up Permanent Virtual Channel (Permanent Virtual Channel, be called for short PVC) between the atm device and transmit network management information.Agreement one cover intercommunication mechanism and information format between agent equipment and the proxied device, the control information of network management system at first is sent to agent equipment, by agent equipment control information is converted to the internal information form, is delivered to destination device by Permanent Virtual Channel PVC again; Conversely, the feedback information of proxied device at first reports agent equipment, is undertaken passing to network management system again after the once format conversion by agent equipment.Therefore this kind method is difficult to the network of competent topological structure complexity owing to adopt the communication mechanism of inner agreement between agent equipment and the proxied device, more is difficult to expansion; Simultaneously network management system manages by agent equipment, can not directly control proxied device, must adopt the design of customizations to network management system, has increased the cost and the complexity of network management system so to a great extent; In addition, also because the format conversion of information need be carried out in agent equipment inside, increased the weight of the load of processor, the number of devices that makes network management system to manage is very limited.
Also having a kind of employing to be linked into the method that network management system manages by the business simulating module that atm device carries, also is a kind of of network management in the band.This method can be supported business such as Ethernet emulation, frame relay based on atm device, by the business simulating module, as Ethernet emulation, from isolating an Ethernet that is exclusively used in network management in logic, network management system is utilized ICP/IP protocol management atm network by this virtual ethernet then atm network in elder generation.This method has embodied the opening of network management, help the exploitation of network management system, but cause cost to improve because of in atm device, having increased the business simulating block configuration, and be not that all atm devices all (for example can provide the Ethernet artificial service, only provide configuration on the mini-plant of simple function such as circuit simulation to be used for the Ethernet emulation module of webmaster at some, obviously be unpractical), thus limited the range of application of the method.The shortcoming of the method also is not utilize the highest main control module of reliability in the atm device, the atm device access to network management system that to be managed by the low relatively business simulating module of reliability on the contrary, dragged down the reliability of whole system, and same Virtual Channel of network management information and general service data multiplex can't guarantee the bandwidth and the quality of network management communication.
In a word, along with ATM use increasingly extensive, the networking mode of atm device has been proposed more requirement, if continue to adopt traditional network management, atm device will be difficult to the access network management system, thereby the flexible Application of restriction atm device.
Summary of the invention
The object of the present invention is to provide network management in a kind of IP-based ATM band, to satisfy the network management requirements under the various networking modes, the method for the invention makes atm device utilize the IP agreement to be linked in the network management system and manages.
In order to achieve the above object, this method mainly may further comprise the steps:
1) in atm network, one can be utilized atm device that the IP agreement is linked into network management system as gateway device;
2) distribute corresponding IP address for atm devices all in the network by the local network management platform, and all IP addresses have identical network prefix;
3) gateway of configuration network management system and all atm devices, gateway is the IP address of gateway device;
4) between atm device, set up webmaster PVC by the local network management platform, form the control net;
5) network management system utilizes the IP address of every atm device to visit this atm device, controls.Described step 5) comprises that the IP bag that carries network management information at first arrives gateway device, and gateway device is searched the PVC that arrives destination device from routing table, transmits this IP bag, and IP wraps in the network that PVC forms and progressively transmits, up to destination device.
Description of drawings
Further describe the present invention below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of main control module 10 in the atm device.
Fig. 2 is a software protocol hierarchy chart in the main control module 10.
Fig. 3 is the flow chart of the method for the invention.
Fig. 4 is an application examples using the method for the invention.
Fig. 5 is the transmission flow figure of IP bag.
Fig. 6 is the schematic diagram of virtual IP address network.
Fig. 7 utilizes the present invention to carry out the ring network schematic diagram of network management.
Fig. 7 utilizes the present invention to carry out the ring network schematic diagram of network management.
Embodiment
Network management in the new ATM band of the present invention, based on the atm device main control module 10 of following structure, its hardware configuration as shown in Figure 1.Main control module 10 comprises: CPU101, atm interface 102, Ethernet interface 103 and related resource 104.
CPU101 and related resource 104 constitute a cover computer system, are used to move the protocol software and Control Software.
Atm interface 102 comprises:
The physical layer 201 that links to each other with ATM switching network 11, ATM layer 202, ATM Adaptation Layer are AAL layer 203; According to different application or class of service, atm adaptation layer 2 03 has types such as AAL1, AAL2, AAL3/4 and AAL5, according to the characteristics of network management data, and in order to reduce expense, the ATM Adaptation Layer of preferably selecting AAL5 to use as webmaster.Atm interface 102 provides physical interface for inband network management, can between the main control module 10 of two atm devices, set up the PVC passage of webmaster special use by ATM switching network 11, although this PVC and business datum are used the multiplexing physical channel of PVC, but the characteristic of ATM can guarantee bandwidth and the communication quality of different PVC, can exclusively enjoy the bandwidth of distributing to it so network management information is communicated by letter in the PVC of special use.
Ethernet interface 103 mainly provides the Ethernet access way of Outband network management, makes atm device possess stronger networking capability, but for the method for the invention, Ethernet interface 103 is optional.
The software of operation has Network Interface Driver, ICP/IP protocol assembly and editing equipment management program in main control module 10, and the software level is divided as shown in Figure 2.The editing equipment management program is to accept control and management is carried out in the network management system order to atm device entity; The ICP/IP protocol assembly makes main control module 10 can utilize ICP/IP protocol and network management system interconnected; Network Interface Driver is by the normal operation of the transmitting-receiving operation on concrete physical interface with support IP agreement.
More than hardware platform that the method for the invention is used done detailed introduction, Fig. 3 is a flow chart of the present invention, the present invention illustrates together below in conjunction with the application examples that Fig. 4 gave for illustrating better.
Shown in Figure 4 is an atm network networking diagram that utilizes the present invention to carry out network management, and network management system links to each other with atm network by Ethernet.
At first select atm device, corresponding to 301 among Fig. 3 as gateway device.Gateway device is used for being connected of network management system and atm network, it usually is the separation in the band, outside the band, network management system removes to visit other atm device by gateway device, gateway device is the nearest equipment of distance webs guard system or the most convenient equipment that is linked into network management system normally, and gateway device and network management system are optimal situations in a local area network (LAN).According to above-mentioned reason, select atm device 1 as gateway device among Fig. 4, can be linked in the network management system by Ethernet or other conventional methods.Atm device 2,3,4,5 directly or indirectly links to each other with atm device 1 by PVC, and the network management information between they and the network management system is atm device 1 forwarding by gateway device.
Secondly give each atm device distributing IP address, network management system utilizes this address can visit atm device, corresponding to 302 among Fig. 3.Adopt C class net in the embodiment shown in fig. 4, promptly subnet mask is 255.255.255.0.To guarantee that in the distributing IP address all atm devices are all in the same network segment, be that the IP address has identical network prefix, according to mentioned above principle, the IP address assignment of each atm device is as follows: atm device 1 is 168.1.6.1, atm device 2 is 168.1.6.2, atm device 3 is 168.1.6.3, and atm device 4 is 168.1.6.4, and atm device 5 is 168.1.6.5.As the atm device 1 of gateway device owing to cross over two subnets, therefore two IP address 168.1.6.1 and 168.1.5.2 in different segment are arranged, atm network is set at the gateway address that leads to network management system with gateway device (atm device 1) at the IP address of atm network side 168.1.6.1, the IP address 168.1.5.2 that network management system inserts native system with gateway device (atm device 1) is set at the gateway address towards atm network, corresponding to 303 among Fig. 3.After distributing the IP address, whole as can be seen network divides for 2 subnets: the local area network (LAN) at network management system place, and network prefix is 168.1.5, comprises network management system and atm device 1; The virtual IP subnet that atm network is formed based on PVC, network prefix is 168.1.6, comprises atm device 1,2,3,4,5.
Between atm device, set up webmaster PVC passage, form the control net, corresponding to 304 among Fig. 3.What dotted line was represented among Fig. 4 is exactly the PVC passage that uses for inband network management, they connect into a tree network to atm device 1,2,3,4,5, that configuration is PVC0 between the atm device 1,2, that configuration is PVC1 between the atm device 1,3, that configuration is PVC2 between the atm device 3,4, and that configuration is PVC3 between the atm device 3,5.The topological structure of control net can change as the case may be, is communicated with by the control net as long as guarantee atm device and the gateway device managed.
Because PVC is connection-oriented, so the control net is that PVC forms by the connection of some point-to-points, the IP bag that carries network management information can't send to destination device by broadcast mode, in Fig. 4, if it is that the IP of atm device 5 assures to be equipped with and sends that a purpose is arranged, this IP bag sends through atm device 1 from network management system, at first can face the selection of PVC0 and PVC1, and it is that the IP bag is sought correct PVC route that the present invention adopts the method for searching routing table.The main control module 10 of each atm device is set up a routing table, has write down IP address, distance and the PVC passage (route) of other atm device that is communicated with this equipment by PVC control net.Atm device periodically by webmaster PVC to sending its routing table with atm device that this equipment directly links to each other, also constantly receive the routing table that other atm devices are sent simultaneously.Atm device is reselected route according to the routing table received according to the principle of SPF, adds newfound route to routing table or already present route is refreshed.Every route all has its life cycle, when its life cycle to and also do not refreshed again, invalid deleted thereby this route is judged as.Table 1 is the routing table of atm device 3, and the routing table of other atm device is similar.
Table 1
| Destination device IP address | Distance | Route |
| 168.1.6.1 | 1 | PVC1 |
| 168.1.6.2 | 2 | PVC1 |
| 168.1.6.3 | 0 | NULL |
| 168.1.6.4 | 1 | PVC2 |
| 168.1.6.5 | 1 | PVC3 |
Fig. 5 has represented in the network of Fig. 4 IP bag flow process of 5 from the network management system to the atm device.Network management system has message to desire to mail to atm device 5, and earlier message being packaged into purpose IP address is that the IP bag of 168.1.6.5 sends by the IP agreement; The IP protocol component mails to gateway according to purpose IP with this bag, and promptly atm device 1; Atm device 1 receives that IP wraps laggard row address and differentiates, finds that purpose is not this equipment, prepares to transmit this IP bag, according to the network prefix 168.1.6.0 of this bag purpose IP address, determines it is to send from PVC control net; Atm device 1 is searched routing table, learns by PVC1 to reach 168.1.6.5, promptly sends this bag from PVC1; Atm device 3 receives that handling process behind the webmaster IP bag with atm device 1, sends the IP bag at last from PVC3; This IP bag obtains confirming after reaching atm device 5, delivers to the upper layer software (applications) resume module.Atm device mails to the IP bag of network management system with same principle, and promptly IP agreement and PVC routing table combine, the reverse network management system that progressively is forwarded to.
Like this, network management system and atm device are formed virtual IP address network as shown in Figure 6, the changeable topological structure of atm network is transparent to network management system fully, the routing mechanism that IP agreement and this method adopt has guaranteed the intercommunication of network management system and atm device, and network management system can utilize the IP address of each atm device directly to control on the webmaster application.
Fig. 7 has showed the ring network that utilizes the present invention to form, and every atm device can be linked into network management system from both direction, promptly has a route stand-by, improves the reliability of system greatly.There are two routes as atm device 2: (1) PVC1-＞Ethernet-＞network management system; (2) PVC2-＞PVC3-＞PVC4-＞Ethernet-＞network management system.Pass through route 1 under the normal condition through two distances and network management system intercommunication that go on foot, because distance is the shortest like this.Unusual when occurring, when interrupting as PVC1, owing to can't receive the routing iinformation of directly sending from PVC1, route is deleted to promptly being judged invalid for 1 life cycle one, and this moment can be by the distance and network management system intercommunication of route 2 through four steps.After PVC1 recovered normally, atm device 2 can be received the routing iinformation that atm device 1 is sent from PVC1 again, regenerated the route 2 that route 1 replaces long distance, so atm device 2 continues by route 1 and network management system intercommunication.
The method of the invention has adopted the technology that realizes the IP agreement on PVC, make atm device to be linked in the network management system by ICP/IP protocol by means of atm network self, and do not increase the hardware spending of equipment, solved of the restriction of legacy network management method to the atm device networking mode, strengthened the flexibility of equipment network greatly, and, guaranteed the transmission that network management data is reliable and secure because network management information utilizes different Virtual Channels with business datum.
Claims (5)
1. network management in the asynchronous transfer mode band of internet protocol-based has atm interface (102) in the main control module of each atm device (10), it is characterized in that: said method comprising the steps of:
1) in atm network, one can be utilized atm device that the IP agreement is linked into network management system as gateway device;
2) distribute corresponding IP address for atm devices all in the network by the local network management platform, and all IP addresses have identical network prefix;
3) gateway of configuration network management system and all atm devices, gateway is the IP address of gateway device;
4) between atm device, set up webmaster PVC by the local network management platform, form the control net;
5) network management system utilizes the IP address of every atm device to visit this atm device, controls.
2. network management in the band as claimed in claim 1, it is characterized in that: the gateway device in the described step 1) is the equipment that nearest equipment of distance webs guard system or most convenient are linked into network management system, and with network management system in a local area network (LAN).
3. network management in the band as claimed in claim 1 is characterized in that: the control net in the described step 4) is communicated with atm device and the gateway device of being managed.
4. network management in the band as claimed in claim 1, it is characterized in that: described step 5) comprises that further the IP bag that carries network management information at first arrives gateway device, gateway device is searched the PVC that arrives destination device from routing table, transmit this IP bag, IP wraps in the network that PVC forms and progressively transmits, up to destination device.
5. network management in the band as claimed in claim 4 is characterized in that: described routing table is that the main control module (10) of each atm device is set up according to IP address, distance and PVC passage or the route of other atm device that is communicated with this equipment by PVC control net.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 00116467 CN1133299C (en) | 2000-06-13 | 2000-06-13 | In-band network management method based on IP protocol for ATM |
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| CN 00116467 CN1133299C (en) | 2000-06-13 | 2000-06-13 | In-band network management method based on IP protocol for ATM |
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| CN1133299C true CN1133299C (en) | 2003-12-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007115458A1 (en) * | 2006-04-10 | 2007-10-18 | Huawei Technologies Co., Ltd. | A method and system for transporting atm message over ip-based network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100342737C (en) * | 2002-06-28 | 2007-10-10 | 华为技术有限公司 | Method for establishing IPOA channel between base station and base station controller |
| CN1309233C (en) | 2004-07-20 | 2007-04-04 | 华为技术有限公司 | Method for supporting PPPoA on wideband switch-in equipment |
| CN100391187C (en) * | 2006-01-05 | 2008-05-28 | 华为技术有限公司 | Broad band cut-in device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007115458A1 (en) * | 2006-04-10 | 2007-10-18 | Huawei Technologies Co., Ltd. | A method and system for transporting atm message over ip-based network |
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| CN1274220A (en) | 2000-11-22 |
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