att_abstract={{The reconvergence of routing protocols in response to changes
in network topology can impact application performance.
While improvements in protocol specification and implementation have significantly reduced reconvergence times,
increasingly performance-sensitive applications continue to
raise the bar for these protocols. As such, monitoring the
performance of routing protocols remains a critical activity
for network operators. We design FlowRoute, a tool based
on passive data plane measurements that we use in conjunction with control plane monitors for offline debugging and
analysis of forwarding table dynamics. We discuss practical
constraints that affect FlowRoute, and show how they can
be addressed in real deployment scenarios. As an application of FlowRoute, we study forwarding table updates by
backbone routers at a tier-1 ISP. We detect interesting behavior such as delayed forwarding table updates and routing
loops due to buggy routers � confirmed by network opera-
tors � that are not detectable using traditional control plane
	att_authors={lb7179, ce880m, ag1971, ss2864, nd1321, cl9862},
	att_copyright_notice={{(c) ACM, 2010. This is the author's version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in ACM Internet Measurement Conference {{, 2010-11-01}}.
	att_tags={measurement, netflow, routing update},
	author={Lee Breslau and Cheng Ee and Alexandre Gerber and Subhabrata Sen and Amogh Dhamdhere and Nicholas Duffield and Carsten Lund},
	institution={{in Proc. of ACM Internet Measurement Conference (IMC)}},
	title={{FlowRoute: Inferring Forwarding Table Updates Using
Passive Flow-level Measurements}},