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D2R: Dataplane-Only Policy-Compliant Routing Under Failures
In networks today, the data plane handles forwarding—sending a packet to...
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Routing on the Visibility Graph
We consider the problem of routing on a network in the presence of line ...
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Contra: A Programmable System for Performance-aware Routing
We present Contra, a system for performance-aware routing that can adapt...
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Inferring Catchment in Internet Routing
BGP is the de-facto Internet routing protocol for exchanging prefix reac...
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Taurus: An Intelligent Data Plane
Emerging applications – cloud computing, the internet of things, and aug...
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Toward a Programmable FIB Caching Architecture
The current Internet routing ecosystem is neither sustainable nor econom...
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Few Throats to Choke: On the Current Structure of the Internet
The original design of the Internet was a resilient, distributed system,...
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Performance-Driven Internet Path Selection
Internet routing can often be sub-optimal, with the chosen routes providing worse performance than other available policy-compliant routes. This stems from the lack of visibility into route performance at the network layer. While this is an old problem, we argue that recent advances in programmable hardware finally open up the possibility of performance-aware routing in a deployable, BGP-compatible manner. We introduce ROUTESCOUT, a hybrid hardware/software system supporting performance-based routing at ISP scale. In the data plane, ROUTESCOUT leverages P4-enabled hardware to monitor performance across policy-compliant route choices for each destination, at line-rate and with a small memory footprint. ROUTESCOUT's control plane then asynchronously pulls aggregated performance metrics to synthesize a performance-aware forwarding policy. We show that ROUTESCOUT can monitor performance across most of an ISP's traffic, using only 4 MB of memory. Further, its control can flexibly satisfy a variety of operator objectives, with sub-second operating times.
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