Network exception handlers: host-network control in enterprise networks
Network exception handlers: host-network control in enterprise networks
复制标题
网络异常处理程序：企业网络中的主机网络控制
DOI：
10.1145/1402958.1402973
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
A. Rowstron
中科院分区：
文献类型：
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作者：
T. Karagiannis;R. Mortier;A. Rowstron
企业网络架构和管理遵循互联网的设计原则，尽管有不同的要求和特点：企业主机由单一的权威机构管理，这本质上为来自不同业务应用程序的流量分配了不同的值。
我们提倡一种新的方法，主机不再被降级到网络的外围，但积极参与网络相关的决策。为了实现主机参与，诸如动态网络拓扑和每链路特性和成本的网络信息被暴露给主机，并且网络管理员在传播的网络信息上指定条件，该条件在条件成立时触发要执行的动作。条件及其操作的组合体现了网络异常处理程序的概念，其定义类似于程序异常处理程序。从概念上讲，网络异常处理程序在主机上执行，其操作由网络和主机状态参数化。
网络异常处理程序允许主机通过在预定义条件下显式控制主机流量来参与网络管理、流量工程和其他操作决策。这种灵活性通过允许有效使用网络资源来提高整体性能。我们概述了几个示例网络异常处理程序，提出了一个架构来支持他们，并评估他们使用从我们自己的企业网络收集的数据。
Enterprise network architecture and management have followed the Internet's design principles despite different requirements and characteristics: enterprise hosts are administered by a single authority, which intrinsically assigns different values to traffic from different business applications.
We advocate a new approach where hosts are no longer relegated to the network's periphery, but actively participate in network-related decisions. To enable host participation, network information, such as dynamic network topology and per-link characteristics and costs, is exposed to the hosts, and network administrators specify conditions on the propagated network information that trigger actions to be performed while a condition holds. The combination of a condition and its actions embodies the concept of the network exception handler, defined analogous to a program exception handler. Conceptually, network exception handlers execute on hosts with actions parameterized by network and host state.
Network exception handlers allow hosts to participate in network management, traffic engineering and other operational decisions by explicitly controlling host traffic under predefined conditions. This flexibility improves overall performance by allowing efficient use of network resources. We outline several sample network exception handlers, present an architecture to support them, and evaluate them using data collected from our own enterprise network.