WELCOME TO DCFabric

ENGLISH中文版

SOFTWARE -- Details




DCFabric can be divided into five layers from top to bottom (see above Figure): the first layer is the Web application layer supported by DCFabric, the second layer is the northbound interface layer, the third layer is the system app layer thatcontains a novel SFabric module, the fourth layer is the basic service layer that guarantees the good running of the upper applications, the fifth layer is the southbound interface layer based on several protocols like OpenFlow.


TheWeb applications supported by DCFabric mainly include Web GUI, Neutron interface, traffic engineering, firewall, load balance, DDos protection and so on. Accordingly, DCFabric is able to provide a series of supports for data centers with network management, virtualization, security and traffic control,etc.


RestfulAPI is the northbound interface provided by DCFabric for application developers. It separates the network applications from network details, making all kinds of facilities, events (i.e. link interruptions) and specific operations transparent to the application programs. Consequently, data centers can improve users’ experience and realize intelligence and safety by variousflexible network applications.

The system app of DCFabric is going to centrally handle the logical processing and generate specific flow entries according to upper applications, lower basic services (topology discovery, host tracking, traffic monitoring and message handling, etc.) and its internal execution strategies. After that, DCFabric installs those flow entries into switches via OpenFlow or OVSDB. Thus, each switch only needs to execute corresponding actions in accordance with flow entries when processing the packets.


Compared with other existing SDNControllers, DCFabric has the following two different characters:

    1.The SFabric Module: Different from other SDN technologies that compute routes on the host level, DCFabric can compute routes on the switch level with the help of SFabric module. Since the number of switches in a network is much less than that of hosts, SFabric can greatly reduce the flow entries and the working load of DCFabric, bringing the benefit of accelerating the speed of DCFabric.Because DCFabric has better efficiency on dealing with gateway, route, networkaddress translation (NAT), multi-tenant management and etc., it can achieve effective control and management on cloud computing data centers whose scale is still rising.

    2.Support for Extension of System APPs: DCFabric also supports the redevelopment of system app, which allows other developers improving parts of the functions of DCFabric on their specific demands.Therefore, DCFabric has better compatibility and applications.


Moreover,considering the limited working capability of a single Controller, in order tocope with increasing network scale and guarantee its stability, the deploymentof cluster Controllers is supported. Therefore, if one Controller is down, the relatedSDN switches will connect with another Controller as soon as possible. Furthermore,multiple Controllers can work as a logical entity due to their good cooperation,which makes the data plane transparent to application programs. Therefore, the deploymentof cluster Controllers make great contributions to the high throughput, lowdelay, good flexibility and strong stability of data centers.