CN111371535B - Disaster backup system and switching method for different-place main and standby data centers - Google Patents
Disaster backup system and switching method for different-place main and standby data centers Download PDFInfo
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- CN111371535B CN111371535B CN202010125101.7A CN202010125101A CN111371535B CN 111371535 B CN111371535 B CN 111371535B CN 202010125101 A CN202010125101 A CN 202010125101A CN 111371535 B CN111371535 B CN 111371535B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
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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
- H04L45/02—Topology update or discovery
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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
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
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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
- H04L45/66—Layer 2 routing, e.g. in Ethernet based MAN's
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Abstract
The disaster recovery system for the main and standby data centers at different places comprises a first data center, a second data center at different places and a communication layer; the communication layer comprises a service network long-distance MSTP and an OTV two-layer intercommunication layer; the OTV two-layer intercommunication layer comprises an OTV two-layer intercommunication routing layer and an OTV two-layer intercommunication convergence exchange layer. The invention relates to a method for switching a disaster backup system of a remote main/standby data center, which comprises the following steps: s1, distributing information of a convergence layer of a service network wide area network; s2, distributing information to an OTV two-layer intercommunication layer; and S3, the OTV two-layer intercommunication layer encapsulates the MAC of the site to the IP through a dynamic MAC-IN-IP rule and then forwards the MAC, so that information exchange among a plurality of data centers is realized. The invention realizes the remote network two-layer intercommunication between the main and backup data centers and solves the problem of disaster backup switching of the main and backup data centers. The two-layer network intercommunication switching of the main and standby data centers is realized without changing the original network structure. The method and the device do not need to change excessive application settings and client settings and change the IP of the target application.
Description
Technical Field
The invention relates to the technical field of data center information exchange, in particular to a disaster backup system and a switching method for a main and standby data center at different places.
Background
The main and standby data centers in different places refer to main data centers and disaster backup data centers of commercial banks distributed in different cities (the distance is more than 300 kilometers), wherein the disaster backup data center provides service succession of disaster emergency situations for the main data center so as to guarantee the continuity of business. The switching of the disaster-backup network environment of the main and backup data centers means that when the main data center fails, the network environment of the disaster-backup data center is the same as that of the main data center through switching of the disaster-backup network environment, so that the continuity of network communication is guaranteed.
According to the requirements of the commercial bank data center supervision and guidance of the bank protection supervision, a legal commercial bank with more than one billion yuan of total assets and a branch institution across provinces and a remote mode disaster-preparation center should be established by the provincial rural credit union, and the disaster recovery capability of an important information system should reach more than 5 (inclusive) th disaster recovery level defined in information safety technology information system disaster recovery specification; other legal business banks should establish a city-like model disaster recovery center and realize data remote backup, and the disaster recovery capability of the important information system should reach above the 4 th level (inclusive) of disaster recovery level defined in information safety technology information system disaster recovery specification.
In order to meet the supervision requirements of financial institutions such as banks at present, a general method for switching disaster recovery in different places is as follows: the two-layer intercommunication of the network and the switching of the disaster recovery system are realized through the long-distance bare fiber, or the disaster recovery switching of the application system is realized through a DNS (domain name system) mode. However, the method for bare fiber in long distance has the problem of high cost, so that the cost for switching the remote disaster recovery is higher; the DNS method for implementing disaster recovery switching of the system requires reconfiguration of the IP address of the server and the environmental parameters of the relevant application access, and is complicated in process and prone to misoperation. The prior art is improved in the aspects of optimizing parameter configuration and reducing misoperation, for example, the publication number is CN 109828867A, and the subject is a chinese invention patent of a cross-data center cloud host disaster recovery method and system. By storing the created parameters of the cloud host, under the condition of disaster failure of the main data center, various configuration parameters of the cloud host are not lost and can be rebuilt in the standby data center, and the service recovery point target RTO is reduced as much as possible. However, in the technical scheme, data interaction between the IP address and the MAC physical address is realized only by mirroring, and when a disaster recovery system with a large data volume and a complicated type is switched, because a plurality of subsystems with priority levels need to be processed, the error rate is high, the time consumption is long, and because the processing speed is limited, configuration parameters cannot be well realized without loss.
Disclosure of Invention
The invention aims to provide a disaster backup system for a main and standby data center in different places, which does not need to change the original network structure and configuration parameters, is convenient and quick to switch and has low error rate, aiming at the defects and shortcomings.
Another objective of the present invention is to provide a disaster backup system for a different-location active/standby data center, which has a low line load and a short communication delay.
The invention further aims to provide a method for realizing the disaster-backup system switching of the main/backup data centers in different places.
In order to achieve the purpose, the invention adopts the following specific technical scheme:
a disaster backup system of a main and standby data center in different places comprises at least one first data center, at least one second data center in different places and a communication framework; the first data center and the second data center at different places respectively comprise a service network wide area network convergence layer, a core network exchange layer, a convergence layer and an access layer which are electrically connected in sequence; the communication structure comprises a service network long-distance MSTP part and a two-layer intercommunication part; the service network wide area network convergence layers are electrically connected through a service network long-distance MSTP part; the two-layer intercommunication part comprises a two-layer intercommunication convergence switching cluster and a two-layer intercommunication routing cluster which are electrically connected in sequence and both cover transmission virtualization (OTV), the two-layer intercommunication routing clusters are electrically connected through a two-layer intercommunication long-distance MSTP, and each convergence layer is electrically connected with the two-layer intercommunication convergence switching cluster respectively.
As a further technical solution of the present invention, the OTV two-layer interworking convergence exchange layer is connected in parallel with the OTV two-layer interworking routing layer; the two-layer intercommunication routing cluster comprises two groups of two-layer intercommunication routers which are connected in parallel, and the two-layer intercommunication convergence switching cluster comprises two groups of two-layer intercommunication convergence switches which are connected in parallel with the two-layer intercommunication routers.
As a further technical scheme of the invention, the service network wide area network convergence layer comprises at least two service network wide area network routers which are connected in series; the core network exchange layer comprises at least two core network exchange devices which are connected in series; the convergence layer comprises at least two convergence switching devices which are connected in series; the access layer comprises at least two access devices which are connected in series.
As a further technical scheme of the invention, the service network wide area network router, the core network switching device, the convergence switching device and the access device are all in cross electrical connection.
As a further technical scheme of the invention, the first data center and the second data center in different places are arranged in a mirror image mode.
As a further technical solution of the present invention, the second data center in different place is provided with a secondary gateway, and the secondary gateway is arranged on a two-layer intercommunication convergence switching cluster, interconnected with a two-layer intercommunication routing cluster of the second data center in different place, and simultaneously used for being interconnected with a disaster recovery server system placed in the second data center in different place.
The invention relates to a method for switching a disaster backup system of a remote main/standby data center, which comprises the following steps:
s1, distributing information to a core network exchange layer by a service network wide area network convergence layer;
s2, the core network exchange layer distributes the received information to a convergence layer, and the convergence layer distributes the received information to an access layer and a two-layer intercommunication part in a communication framework;
and S3, the two-layer intercommunication part encapsulates the MAC of the site to the IP through a dynamic MAC-IN-IP rule and then forwards the MAC, thereby realizing information exchange among a plurality of data centers.
As a further technical solution of the present invention, in the step S3, the two-layer interworking part implements two-layer network interworking in a multicast mode or a unicast mode.
As a further technical scheme of the invention, the unicast mode adopts a Server-Client mode.
As a further technical solution of the present invention, before the step S1, the method further includes a step S0: the information transmission among a plurality of data centers is realized among the service network wide area network convergence layers through the service network long-distance MSTP part.
The terms referred to in this invention are to be interpreted:
MAC, media access control address; long distance MSTP, multi-service delivery platform; server-Client, server-Client; a Server, a Server; client, client; adjacency-server adjacent to the server; primary adjacency-server, primary adjacency server; site-VLAN, data center-virtual local area network; site-ID, data center-identification number; AED, is the abbreviation of Authoritative edge device of Authoritative boundary equipment, is used for carrying on the forwarding of VLAN; VLAN, virtual local area network; OTV, an abbreviation of Overlay Transport Virtualization, namely Overlay Transport Virtualization, is a Virtualization technology overlaid on a network Transport layer, and supports multi-site interconnection; BFD, an abbreviation of Bidirectional Forwarding Detection, is a network protocol for detecting a fault between two Forwarding points; bridge-domain, bridged domain; OSPF (Open Shortest Path First) is an Interior Gateway Protocol (IGP); spinal-Tree, spanning Tree protocol.
The invention realizes the network two-layer intercommunication of the main and standby data centers and the local communication between disaster standby systems on the traditional long-distance MSTP IP network by applying the technology based on the two-layer network intercommunication on the three-layer IP network and the gateway migration method of the disaster standby system, thereby achieving the purpose of disaster standby switching.
The specific working principle of the invention comprises:
the two-layer network intercommunication technology is mainly a technology for realizing two-layer intercommunication among multiple data centers by packaging MAC of a local site to IP and then forwarding the IP to a remote site through a route by utilizing a dynamic MAC-IN-IP technology.
One basic principle of two-layer network interworking is to run control protocols between data centers to advertise MAC address reachability information to each other, rather than using a learning mechanism for the data plane. Before all two-layer interworking edge devices can exchange MAC address information, they must know the existence of each other and exchange the necessary information to form an adjacency.
The user can select a multicast mode or a unicast mode to establish and maintain the adjacency relation according to different underlying networks.
In the design method, a unicast mode is adopted to realize two-layer network intercommunication. The unicast mode adopts a Server-Client mode, one or two-layer intercommunication edge devices are used as two-layer intercommunication servers, other two-layer intercommunication devices are used as two-layer intercommunication clients to be registered on the Server, and local MAC address information and external MAC address information are injected into the Server.
The specific implementation mode is that two-layer intercommunicating routers and two-layer intercommunicating convergence switches are respectively arranged in a main data center and a disaster backup data center, and the two routers can back up each other and can realize the purposes of link backup and automatic switching through double links.
Compared with the prior art, the invention has the following beneficial effects:
the invention realizes the two-layer intercommunication between the multiple data centers by introducing the two-layer network intercommunication technology, packaging the MAC of the local site to the IP by utilizing the dynamic MAC-IN-IP technology and then forwarding the MAC to the remote site through the route, realizes the two-layer intercommunication of the remote network between the main data center and the disaster backup data center of the financial institution under the environment of the traditional long-distance MSTP line and the three-layer IP wide area network, and solves the problem of disaster backup switching of the main and backup data centers.
On the basis of the traditional long-distance MSTP circuit and three-layer IP wide area network technology, the two-layer network intercommunication of the main and standby data centers is realized by applying the two-layer network intercommunication technology without changing the original network structure, and the two-layer network intercommunication switching of the main and standby data centers is realized under the environment of using the long-distance MSTP and the three-layer IP wide area network.
When disaster recovery is switched, excessive application settings and client settings do not need to be changed, switching is convenient and fast through a two-layer network intercommunication technology, intercommunication between a disaster recovery network environment of a disaster recovery data center and a network environment of a main data center is realized on a two-layer network, excessive changes do not need to be made on a server IP address and environment parameters accessed by related applications, and the client does not need to change the IP of a target application and is transparent to the client. Therefore, when disaster recovery switching is performed, switching of the network environment and switching of the application environment can be realized more quickly.
When the disaster-backup system of the remote data center is switched by the method, because the gateway corresponding to the switching system is still reserved in the main data center, when the disaster-backup systems of different network segments are communicated with each other, a communication path needs to be from the disaster-backup data center to the original three-layer gateway of the main data center through the two-layer intercommunication line, and then the communication path returns to the disaster-backup system of the disaster-backup data center through the two-layer intercommunication line. The communication path not only increases the load of the bandwidth of the two-layer intercommunication line, but also greatly increases the communication delay, and the realization of mutual access and system switching between disaster recovery systems is influenced by the greatly increased communication delay. In order to solve the problem, the invention applies a gateway migration method. When the disaster recovery system is switched to the disaster recovery data center, the secondary gateway of the disaster recovery system is added on the two-layer intercommunication convergence switching cluster device arranged in the second data center, and meanwhile, the communication between the disaster recovery systems is realized in the local communication under the disaster recovery environment through the secondary gateway by adding the detailed route on the disaster recovery system arranged in the second data center in a different place, so that the problem that the communication between the disaster recovery systems needs to go back and forth across the two-layer intercommunication path is solved.
The invention is further described below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a remote active/standby data center disaster backup system in a preferred embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a remote active/standby data center disaster backup system device in a preferred embodiment of the present invention.
Description of reference numerals:
1 a first data center, 2 a second data center in different places, 3 a communication framework, 11, 21 a service network wide area network convergence layer, 12, 22 a core network exchange layer, 13, 23 a convergence layer, 14, 24 an access layer, 31 a long distance MSTP part of a service network, 32 a two-layer intercommunication part, 321 a two-layer intercommunication route cluster, 322 a two-layer intercommunication convergence exchange cluster, 111, 211 a service network wide area network router, 121, 221 a core network exchange device, 131, 231 a convergence exchange device, 141, 241 an access device, 3211OTV two-layer intercommunication router, 3221OTV two-layer intercommunication convergence switch and 3231 a two-layer intercommunication long distance MSTP.
Detailed Description
The present invention is further explained and illustrated by the following embodiments, which should be understood that the purpose of the following embodiments is to make the technical solution of the present invention more clear and easy to understand, and not to limit the protection scope of the claims.
As shown in fig. 1-2, the disaster recovery system for different-place main and standby data centers of the present invention includes at least one first data center 1, at least one different-place second data center 2, and a communication framework 3; the first data center 1 and the second data center 2 in different places respectively comprise service network wide area network convergence layers 11 and 21, core network exchange layers 12 and 22, convergence layers 13 and 23 and access layers 14 and 24 which are electrically connected in sequence; the communication framework 3 comprises a service network long distance MSTP part 31 and a two-layer intercommunication long distance MSTP32; the service network wide area network convergence layers 11 and 21 are electrically connected through a service network long-distance MSTP part 31; the two-layer interworking long distance MSTP32 includes a two-layer interworking route cluster 321 and a two-layer interworking convergence switching cluster 322 electrically connected to each other, and the convergence layers 13 and 23 are electrically connected to the two-layer interworking route cluster 321 and the two-layer interworking convergence switching cluster 322, respectively.
In a preferred embodiment, the two-layer interworking routing cluster 321 includes at least four two-layer interworking routers 3211 connected in parallel two by two, the two-layer interworking aggregation switching cluster 322 includes at least four two-layer interworking aggregation switches 3221 connected in parallel two by two, and the two-layer interworking routing cluster 321 is connected in series with the two-layer interworking aggregation switching cluster 322.
In a preferred embodiment, the service network wide area network convergence layer 11, 21 includes at least two service network wide area network routers 111, 211 connected in series; the core network switching layer 12, 22 comprises at least two core network switching devices 131, 231 connected in series with each other; the convergence layers 13, 23 comprise at least two convergence switching devices 131, 231 connected in series with each other; the access stratum 14, 24 comprises at least two access means 141, 241 connected in series with each other. Furthermore, the service network wan routers 111, 211, the core network switching devices 121, 221, the aggregation switching devices 131, 231, and the access devices 141, 241 are all electrically connected in a cross manner.
In a preferred embodiment, the first data center 1 and the second data center 2 are mirror images of each other. The second data center 2 in a different place may also be provided with a secondary gateway, which is disposed on the two-layer interworking aggregation switching cluster 322 device, and is interconnected with the two-layer interworking routing cluster 321 device of the second data center 2 in a different place, and is also interconnected with the disaster recovery server system disposed in the second data center 2 in a different place, so as to provide local routing switching across three-layer networks for the disaster recovery server system of the second data center 2 in a different place.
The invention relates to a switching method of a disaster backup system of a different-place main/standby data center, which comprises the following steps:
s1, a service network wide area network convergence layer 11, 21 distributes information to a core network exchange layer 12, 22;
s2, the core network exchange layers 12 and 22 distribute the received information to the convergence layers 13 and 23, and the convergence layers 13 and 23 distribute the received information to the access layers 14 and 24 and a two-layer intercommunication part 32 in the communication framework 3;
and S3, the two-layer intercommunication part 32 encapsulates the MAC of the site to the IP through a dynamic MAC-IN-IP rule and then forwards the MAC, thereby realizing information exchange among a plurality of data centers.
In a preferred embodiment, in the step S3, the layer two interworking part 32 implements layer two interworking in a multicast mode or a unicast mode. Further, the unicast mode adopts a Server-Client mode.
In a preferred embodiment, step S1 further includes, before step S0: the service network wide area network convergence layers 11 and 21 realize information transmission among a plurality of data centers through a service network long distance MSTP part 31.
The two-layer intercommunication network technology is a technology which realizes the two-layer (link layer) intercommunication of two or more IP networks on a cross-IP wide area network through an encapsulation technology on the basis of three-layer IP network communication, and is just like the communication in the same two-layer local area network. The gateway migration method of the disaster backup system is a method for migrating a gateway for communication between the disaster backup systems to the local disaster backup environment when disaster backup switching of the disaster backup systems is performed.
The invention realizes the network two-layer intercommunication of the main and standby data centers and the local communication between disaster standby systems on the traditional long-distance MSTP IP network by applying the technology based on the two-layer network intercommunication on the three-layer IP network and the gateway migration method of the disaster standby system, thereby achieving the aim of disaster standby switching.
The specific working principle of the invention comprises:
the two-layer network intercommunication technology is mainly a technology which utilizes a dynamic MAC-IN-IP technology to package the MAC of a local site to an IP and then forwards the MAC to a remote site through a route, thereby realizing two-layer intercommunication among multiple data centers.
One basic principle of two-layer network interworking is to run control protocols between data centers to advertise MAC address reachability information to each other, rather than using a learning mechanism for the data plane. Before all two-layer interworking edge devices can exchange MAC address information, they must know the existence of each other and exchange the necessary information to form an adjacency.
The user can select a multicast mode or a unicast mode to establish and maintain the adjacency relation according to different underlying networks.
In the design method, a unicast mode is adopted to realize two-layer network intercommunication. The unicast mode adopts a Server-Client mode, one or two-layer intercommunication edge devices are used as two-layer intercommunication servers, other two-layer intercommunication devices are used as two-layer intercommunication clients to be registered on the Server, and local MAC address information and learning external MAC address information are injected into the Server.
The specific implementation mode is that two OTV two-layer intercommunication routers and two OTV two-layer intercommunication convergence switches are respectively deployed in a main data center and a disaster recovery data center, and the two routers can back up each other and can simultaneously realize the purposes of link backup and automatic switching through double links.
Compared with the prior art, the invention has the following beneficial effects:
by introducing the OTV two-layer network intercommunication technology, the invention realizes the remote network two-layer intercommunication between the main data center and the disaster backup data center of the financial institution under the environment of the traditional long-distance MSTP line and the three-layer IP wide area network, and solves the problem of disaster backup switching of the main and backup data centers at different places.
On the basis of the traditional long-distance MSTP circuit and three-layer IP wide area network technology, the two-layer network intercommunication of the different-place main and standby data centers is realized by applying the two-layer network intercommunication technology without changing the original network structure, and the two-layer network intercommunication switching of the different-place main and standby data centers is realized under the environment of using the long-distance MSTP and the three-layer IP wide area network.
When disaster recovery is switched, excessive application settings and client settings do not need to be changed, switching is convenient and rapid, intercommunication between a disaster recovery network environment of a remote disaster recovery data center and a network environment of a main data center is realized on a two-layer network through a two-layer network intercommunication technology, excessive changes do not need to be made on a server IP address and environment parameters accessed by related applications, and the client does not need to change the IP of a target application and is transparent to the client. Therefore, when disaster recovery switching is performed, switching of the network environment and switching of the application environment can be realized more quickly.
When the disaster-backup system of the remote data center is switched by the method, because the gateway corresponding to the switching system is still reserved in the main data center, when the disaster-backup systems of different network segments communicate with each other, a communication path needs to be from the remote disaster-backup data center to the original three-layer gateway of the main data center through the two-layer intercommunication line, and then the communication path returns to the remote disaster-backup data center disaster-backup system through the two-layer intercommunication line. The communication path not only increases the load of the bandwidth of the two-layer intercommunication line, but also greatly increases the communication delay, and the realization of mutual access and system switching between disaster recovery systems is influenced by the greatly increased communication delay. In order to solve the problem, the invention applies a gateway migration method. When the disaster recovery system is switched to the disaster recovery data center, the secondary gateway of the disaster recovery system is added on the two-layer intercommunication convergence switching cluster device arranged in the second data center, and meanwhile, the routing gateway points to the secondary gateway in a mode of adding detailed routing on the disaster recovery system, so that the communication between the disaster recovery systems realizes the local communication under the disaster recovery environment through the secondary gateway, and the problem that the communication between the disaster recovery systems needs to go back and forth across the two-layer intercommunication path is solved.
The present invention will be further illustrated by the following specific examples.
Example 1
In order to realize the switching of the main and standby data center disaster backup systems, 2OTV two-layer intercommunication routers and 2OTV two-layer intercommunication convergence switches are respectively deployed in the main data center and the remote disaster backup center to build a main and standby data center two-layer intercommunication network. OTV two-layer intercommunication routers between the data centers are interconnected through long-distance MSTP lines of different operators, and OTV two-layer intercommunication routers inside the data centers are interconnected through local area network lines; the OTV two-layer intercommunication convergence switch of the two data centers is used for tandem connection of two-layer links of each function partition.
Meanwhile, the two-layer intercommunication network realizes the following technical means:
two-layer interworking deployment mode selection:
one basic principle of two-layer interworking is to run control protocols between data centers to advertise MAC address reachability information to each other, rather than using a learning mechanism for the data plane. Before all layer two interworking edge devices can exchange MAC address information, they must know the existence of each other and exchange the necessary information to form an adjacency.
The user can select a multicast mode or a unicast mode to establish and maintain the adjacency relation according to different underlying networks. Taking the master and slave data centers of Guangdong Bank as an example, the master and slave data centers of Guangdong Bank are interconnected by adopting long-distance MSTP lines of different operators, and the multicast supporting capability is limited, so the two-layer interworking network is deployed in a unicast mode.
The unicast mode adopts a Server-Client mode, one or two-layer intercommunication edge devices are used as two-layer intercommunication servers, other two-layer intercommunication devices are used as two-layer intercommunication clients to be registered on the servers, and local MAC address information and learning external MAC address information are injected into the servers.
In the two-layer intercommunication deployment in the design, two OTV two-layer intercommunication routers of a main data center are used as the ad jacent-servers, wherein the OTV two-layer intercommunication router of the main data center is used as the primary ad jacent-server.
Two-layer intercommunication Site-VLAN and Site-ID selection:
Site-VLAN is used for internal communication of two AEDs of each Site, detects the state of an opposite end and proposes that the Site-VLAN of each Site adopts the same VLAN number; the Site-ID is the identity of each Site, and is required to be unique within the OTV domain, and the Site-IDs of two AEDs on the same Site must be the same.
BFD for two-layer intercommunication fast convergence setting:
the detection speed of AED failure is improved by adopting BFD, and three-layer addresses are needed to be configured for BFD; the two sites of the main and standby data centers adopt the same bridge-domain corresponding to the same Site-VLAN, and the interface addresses are not issued to the OSPF of the OTV network.
And (3) spinning-Tree design:
in a main and standby data center two-layer intercommunication network architecture, equipment starts a spanning tree protocol, and loop risks in abnormal conditions such as equipment faults and manual misoperation are prevented.
And (3) route design:
in a main and standby data center two-layer intercommunication network, IGP is mainly used as a bottom layer to provide reachability guarantee for two-layer intercommunication neighbor address interconnection and from two-layer intercommunication Client to two-layer intercommunication adjacency-server. From the aspects of openness, scalability, maturity and the like of a routing protocol, OSPF is selected as the IGP of the two-layer interworking network.
Example 2
The invention can be applied to the realization of disaster recovery switching among a plurality of data centers, such as the realization of a disaster recovery structure of two places and three centers, realizes the mutual communication among a plurality of data centers through long-distance MSTP or bare optical fibers, and realizes the two-layer intercommunication among three or more data centers and the simple switching of a disaster recovery system.
In order to implement two-layer interworking and disaster recovery switching between the third data center and the two other data centers, at least two OTV two-layer interworking aggregation switches 3221 and two OTV two-layer interworking routers 3211 also need to be deployed in the third data center, and two long-distance MSTP lines with sufficient bandwidth or bare optical fibers are needed to implement interconnection and interworking of networks. An OTV two-layer interworking router 3211 of the third data center is interworked with the first data center 1 and an off-site second data center 2OTV two-layer interworking router 3211 through a long-distance MSTP line, and a third data center OTV two-layer interworking aggregation switch 3221 is interconnected with a third data center core network and simultaneously interconnected with the third data center two-layer interworking router. Because the three data centers are interconnected by adopting long-distance MSTP lines of different operators and have limited multicast supporting capacity, the two-layer intercommunication networks of the three data centers can also be deployed in a unicast mode. The third data center can realize the same function as the first data center 1 and the second data center 2 in different places through applying the same method of two-layer intercommunication and sub-gateway migration, and realize the purposes of multi-center disaster recovery switching and multi-activity of the application system.
While the present invention has been described by way of examples, and not by way of limitation, other variations of the disclosed embodiments, as would be readily apparent to one of skill in the art, are intended to be within the scope of the present invention, as defined by the claims.
Claims (10)
1. A disaster backup system of a different-place main and standby data center is characterized in that: the system comprises at least one first data center, at least one remote second data center and a communication architecture;
the first data center and the second data center at different places respectively comprise a service network wide area network convergence layer, a core network exchange layer, a convergence layer and an access layer which are electrically connected in sequence;
the communication structure comprises a service network long-distance MSTP part and a two-layer intercommunication part;
the service network wide area network convergence layers are electrically connected through a service network long-distance MSTP part;
the two-layer intercommunication part comprises a two-layer intercommunication convergence switching cluster and a two-layer intercommunication routing cluster which are electrically connected in sequence and both cover transmission virtualization (OTV), the two-layer intercommunication routing clusters are electrically connected through a two-layer intercommunication long-distance MSTP, and each convergence layer is electrically connected with the two-layer intercommunication convergence switching cluster respectively.
2. The disaster recovery system for the main and standby off-site data centers according to claim 1, characterized in that: the two-layer intercommunication convergence exchange cluster is connected with the two-layer intercommunication route cluster in parallel; the two-layer intercommunication routing cluster comprises two groups of two-layer intercommunication routers which are connected in parallel, and the two-layer intercommunication convergence switching cluster comprises two groups of two-layer intercommunication convergence switches which are connected in parallel with the two-layer intercommunication routers.
3. The disaster recovery system of the off-site main and standby data centers according to claim 1, wherein: the service network wide area network convergence layer comprises at least two service network wide area network routers which are connected in series; the core network exchange layer comprises at least two core network exchange devices which are connected in series; the convergence layer comprises at least two convergence switching devices which are connected in series; the access layer comprises at least two access devices which are connected in series.
4. The disaster recovery system for the main and standby off-site data centers according to claim 3, wherein: the service network wide area network router, the core network switching device, the convergence switching device and the access device are all in cross electrical connection.
5. The disaster recovery system for the main and standby off-site data centers according to claim 1, characterized in that: the first data center and the second data center in different places are arranged in a mirror image mode.
6. The disaster recovery system of the off-site main and standby data centers according to claim 1, wherein: the remote second data center is provided with a secondary gateway, the secondary gateway is arranged on the two-layer intercommunication convergence exchange cluster, is interconnected with the two-layer intercommunication routing cluster of the remote second data center and is simultaneously used for being interconnected with the disaster recovery server system arranged in the remote second data center.
7. A switching method of the disaster-backup system of the main standby data center in different places according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:
s1, distributing information to a core network exchange layer by a service network wide area network convergence layer;
s2, the core network exchange layer distributes the received information to a convergence layer, and the convergence layer distributes the received information to an access layer and a two-layer intercommunication part in a communication framework;
and S3, the two-layer intercommunication part encapsulates the MAC of the site to the IP through a dynamic MAC-IN-IP rule and then forwards the MAC, thereby realizing information exchange among a plurality of data centers.
8. The switching method of the disaster-backup system of the main standby remote data center according to claim 7, characterized in that: in the step S2, the two-layer interworking part implements two-layer network interworking in a multicast mode or a unicast mode.
9. The method for switching the disaster-backup system of the offsite main and backup data center according to claim 8, wherein the method comprises the following steps: the unicast mode adopts a Server-Client mode.
10. The method for switching the disaster-backup system of the offsite main and backup data center according to claim 7, wherein the method comprises the following steps: step S0 is also included before step S1: long-distance MSTP part between service network wide area network convergence layers
Information transfer between multiple data centers occurs.
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