hide
Free keywords:
-
Abstract:
This paper proposes Monarch, a novel tool that accurately emulates transport
protocol flows from an end host controlled by its user to any other Internet
host that responds to simple TCP, UDP, or ICMP packet probes. Since many
Internet hosts and routers respond to such probes, Monarch can evaluate
transport protocols, such as TCP Reno, TCP Vegas, and TCP Nice, over a large
and diverse set of Internet paths. Current approaches to evaluating these
protocols need control over both end hosts of an Internet path. Consequently,
they are limited to a small number of paths between nodes in testbeds like
PlanetLab, RON or NIMI. Monarch's ability to evaluate transport protocols with
minimal support from the destination host enables many new measurement studies.
We show the feasibility of using Monarch for three example studies: (a)
understanding transport protocol behavior over network paths that are less
explored by the research community, such as paths to cable and DSL hosts, (b)
investigating the relative performance of different transport protocol designs,
such as TCP Vegas and TCP Reno, and (c) testing protocol implementations under
a wide range of experimental conditions.
