BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//wp-events-plugin.com//7.2.3.1//EN
BEGIN:VEVENT
UID:627@lincs.fr
DTSTART;TZID=Europe/Paris:20210421T104500
DTEND;TZID=Europe/Paris:20210421T120000
DTSTAMP:20210421T102019Z
URL:https://www.lincs.fr/events/reduce-reuse-recycle-repurposing-existing-
 measurements-to-identify-stale-traceroutes/
SUMMARY:Reduce\, Reuse\, Recycle: Repurposing Existing Measurements to
 Identify Stale Traceroutes
DESCRIPTION:Dear all\, \nThe Internet Measurement reading group will meet
 again on April 21st.\nWe will talk about the following paper : Reduce\,
 Reuse\, Recycle: Repurposing Existing Measurements to Identify Stale
 Traceroutes (Giotsas et al\, IMC 2020).\n\nI encourage you to join us
 at 10:45 for a virtual coffee break\, so that the talk begins
 at 11:00.\n\nAbstract:\n\n\n\n\nMany systems rely on traceroutes to
 monitor or characterize the Internet. The quality of the systems’
 inferences depends on the completeness and freshness of the traceroutes\,
 but the refreshing of traceroutes is constrained by limited resources at
 vantage points. Previous approaches predict which traceroutes are likely
 out-of-date in order to allocate measurements\, or monitor BGP feeds for
 changes that overlap traceroutes. Both approaches miss many path changes
 for reasons including the difficulty in predicting changes and the coarse
 granularity of BGP paths.\nThis paper presents techniques to identify
 out-of-date traceroutes without issuing any measurements\, even if a change
 is not visible at BGP granularity. We base our techniques on two
 observations. First\, although BGP updates encode routes at AS
 granularity\, routers issue updates when they change intra-domain routes or
 peering points within the same AS path. Second\, route changes correlate
 across paths\, and many publicly available traceroutes exist. Our
 techniques maintain an atlas of traceroutes by monitoring BGP updates and
 publicly available traceroutes for signals to mark overlapping atlas
 traceroutes as stale. We focus our analysis of traceroute path changes at
 the granularity of border router IPs which provides an abstraction finer
 than AS or PoP-level but is not affected by the periodicity of intra-domain
 load balancers. Our evaluation indicates that 80% of the traceroutes that
 our techniques signal as stale have indeed changed\, even though the AS
 hops remained the same. Our techniques combine to identify 79% of all
 border IP changes\, without issuing a single online
 measurement.\n\n—\n\n\nParticiper à la réunion
 Zoom\nhttps://telecom-paris.zoom.us/j/94270583366?pwd=cGVqdGg4WEZZSldscGpvT
 TMvbEJOdz09\n\nID de réunion : 942 7058 3366\nCode secret :
 821734\n\n\n\n\n
CATEGORIES:Internet Measurement,Working Group,Youtube
END:VEVENT
BEGIN:VTIMEZONE
TZID:Europe/Paris
X-LIC-LOCATION:Europe/Paris
BEGIN:DAYLIGHT
DTSTART:20210328T030000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
END:DAYLIGHT
END:VTIMEZONE
END:VCALENDAR