Network Exception Handlers: Host-network Control in Enterprise Networks Thomas Karagiannis, Richard Mortier and Antony Rowstron {thomkar, antr}@microsoft.com, mort@vipadia.com Microsoft Research Cambridge, UK ABSTRACT 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 traf c 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, de ned 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, traf c engineering and other operational decisions by explicitly controlling host traf c under prede ned conditions. This exibility improves overall performance by allowing ef cient
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Network exception handlers: host-network control in enterprise networks
Karagiannis, Thomas; Mortier, Richard; Rowstron, Antony
Follow ACM SIGCOMM Computer Communication Review
, Volume 38 (4)
Association for Computing Machinery – Oct 1, 2008
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