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Per-Address Spanning Tree Networks

An address generation and address technology, used in data exchange networks, digital transmission systems, electrical components, etc., can solve problems such as difficulty in meeting data center network requirements, poor scalability, and poor use of available bandwidth.

Inactive Publication Date: 2014-06-11
IBM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The network requirements of modern data centers are significantly different from traditional networks, so traditional network designs are often difficult to meet the network requirements of modern data centers
For example, layer-2 Ethernet networks provide the flexibility and simplicity of configuration that network operators want, but layer-2 Ethernet networks scale poorly and use available bandwidth poorly
Layer-3 Internet Protocol (IP) networks offer better scalability and bandwidth, but are less flexible and harder to configure and manage

Method used

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Examples

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Embodiment Construction

[0017] The illustrative embodiments described herein relate to enabling efficient packet forwarding on network switches and / or routers. In order to forward packets across the network, each switch and / or router must be programmed with a matching set of action rules specifying how to handle any packet the switch and / or router may receive. The most common action a switch or router takes when a packet is received is to forward the packet out a specific output port or set of output ports. The most common mechanism for programming forwarding tables in Layer-2 Ethernet networks is to run a distributed Spanning Tree Protocol (STP) mechanism in order to establish a single logical spanning tree that spans all switches in the network. All packets are forwarded along this single spanning tree. The STP mechanism guarantees that all forwarding paths are loop-free, but is a poor use of the available bandwidth for network topologies where there are multiple paths between source and destinati...

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Abstract

A mechanism is provided for implementing a per-address spanning tree (PAST) to direct the forwarding of packets in a set of switches. The per-address spanning tree is computed for each identified address in a set of addresses thereby forming a set of per-address spanning trees. A set of forwarding rules associated with each per-address spanning tree in the set of per-address spanning trees is generated and installed all appropriate switches in the set of switches for which the per-address spanning tree is generated so that each switch in the set of switches will forward packets based on the set of forwarding rules installed in that switch.

Description

technical field [0001] The present application relates generally to improved data processing apparatus and methods, and more particularly to mechanisms for implementing per-address spanning tree algorithms for data center Ethernet networks. Background technique [0002] The network requirements of modern data centers are significantly different from traditional networks, so traditional network designs are often difficult to meet the network requirements of modern data centers. For example, a layer-2 Ethernet network provides the flexibility and simplicity of configuration that network operators want, but a layer-2 Ethernet network is poorly scalable and poorly uses available bandwidth. Layer-3 Internet Protocol (IP) networks offer better scalability and bandwidth, but are less flexible and more difficult to configure and manage. Network operators want to get the benefits of both designs, and at the same time, prefer commodity hardware to expensive custom solutions in order ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/741H04L12/753H04L45/74
CPCH04L45/54H04L45/48H04L45/484
Inventor J·B·卡特W·M·费尔特B·E·斯蒂芬斯
Owner IBM CORP