最短路径桥接(SPB)

最短路径桥接(SPB) delivers traffic on the shortest path available and enables network virtualization in carrier grade networks and data centres.

802.1aq SPB is an IEEE networking standard with a primary focus on addressing STP challenges. However, SPB is more than just an STP evolution and unlike MPLS, which requires a “stack” of protocols (for example: LDP, OSPF, MP-BGP, among others), SPB relies on a single protocol to provide this functionality: IS-IS (Intermediate System to Intermediate System).

Alcatel-Lucent Enterprise 智能织物 (iFab) provides further simplification by automating network node provisioning, 客户端设备附件, 以及动态服务实例化. 具有这种简单性和自动化, an ALE-powered SPB solution offers high-end services for a lower TCO.

SPB:成功的开放标准

SPB has been standardized by both IEEE and IETF, published as 802.1aq和RFC 6329. ALE actively supports SPB as the standard for network virtualisation, so multi-vendor networks can reap the SPB benefits.

SPB simplifies the network with features such as:

• Scalable, fast-converging, multi-path fabric
• Multi-tenancy
• 动态服务实例化
• 仅限边缘业务发放
• 微营销
• Non-IP core
• 数据平面:IEEE 802.ah提供商主干桥接
• The Control Plane: RFC 6329 IS-IS Equal-cost trees

SPB is more than just the evolution of STP

SPB overcomes STP limitation such as unused links, sub-optimal paths, and slow convergence. It creates loop-free topology without blocking links, and offers faster convergence and path optimisation.

最短路径桥接的好处

• Less complex network: Dynamically build and maintain the network topology between nodes
• Efficient operations: Load share and use all available physical connections making more bandwidth available
• Cloud-ready network: Transform data center networks into private clouds quickly and easily
• 改进的性能:无缝, sub-second network changes with a multi-path fabric for traffic distribution
• IT staff save time: Add, remove and relocate virtual machines using software configuration
• Reduce potential for human error: Automatic configuration to prevent human errors