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Prior research has focused on various aspects of anycast, either its usage in particular services such as DNS or characterizing its adoption by Internet-wide active probing methods. In this paper, we first explore an alternative approach to characterize anycast based on previously collected global BGP routing information. Leveraging state-of-the-art active measurement results as near-ground-truth, our passive method without requiring any Internet-wide probes can achieve 90% accuracy in detecting anycast prefixes. More importantly, our approach uncovers anycast prefixes that have been missed by prior datasets based on active measurements. While investigating the root causes of inaccuracy, we reveal that anycast routing has been entangled with the increased adoption of remote peering, a type of layer-2 interconnection where an IP network may peer at an IXP remotely without being physically present at the IXP. The invisibility of remote peering from layer-3 breaks the assumption of the shortest AS paths on BGP and causes an unintended impact on anycast performance. We identify such cases from BGP routing information and observe that at least 19.2% of anycast prefixes have been potentially impacted by remote peering.<\/jats:p>","DOI":"10.1145\/3371927.3371930","type":"journal-article","created":{"date-parts":[[2019,11,8]],"date-time":"2019-11-08T20:27:58Z","timestamp":1573244878000},"page":"18-25","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":17,"title":["Towards passive analysis of anycast in global routing"],"prefix":"10.1145","volume":"49","author":[{"given":"Rui","family":"Bian","sequence":"first","affiliation":[{"name":"University of Delaware"}]},{"given":"Shuai","family":"Hao","sequence":"additional","affiliation":[{"name":"CAIDA \/ UC San Diego"}]},{"given":"Haining","family":"Wang","sequence":"additional","affiliation":[{"name":"University of Delaware"}]},{"given":"Amogh","family":"Dhamdere","sequence":"additional","affiliation":[{"name":"CAIDA \/ UC San Diego"}]},{"given":"Alberto","family":"Dainotti","sequence":"additional","affiliation":[{"name":"CAIDA \/ UC San Diego"}]},{"given":"Chase","family":"Cotton","sequence":"additional","affiliation":[{"name":"University of Delaware"}]}],"member":"320","published-online":{"date-parts":[[2019,11,8]]},"reference":[{"key":"e_1_2_1_1_1","unstructured":"2019. https:\/\/github.com\/bianrui0315\/ccr_Anycast. 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Analysis of End-to-end Delay Measurements in Internet. In Passive and Active Network Measurement (PAM)."},{"key":"e_1_2_1_5_1","unstructured":"CAIDA AS Relationships Dataset. 2018. http:\/\/www.caida.org\/data\/as-relationships\/. (2018).  CAIDA AS Relationships Dataset. 2018. http:\/\/www.caida.org\/data\/as-relationships\/. (2018)."},{"key":"e_1_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1145\/2815675.2815717"},{"key":"e_1_2_1_7_1","doi-asserted-by":"publisher","DOI":"10.1145\/2674005.2675013"},{"key":"e_1_2_1_8_1","doi-asserted-by":"publisher","DOI":"10.1145\/2716281.2836101"},{"volume-title":"A Fistful of Pings: Accurate and Lightweight Anycast Enumeration and Geolocation","author":"Cicalese Danilo","key":"e_1_2_1_9_1"},{"volume-title":"A Longitudinal Study of IP Anycast. ACM SIGCOMM Computer Communication Review 48(1)","year":"2018","author":"Cicalese Danilo","key":"e_1_2_1_10_1"},{"volume-title":"Anycast Latency: How Many Sites Are Enough?. 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In Passive and Active Network Measurement (PAM).  George Nomikos and Xenofontas Dimitropoulos. 2016. traIXroute: Detecting IXPs in traceroute paths. In Passive and Active Network Measurement (PAM).","DOI":"10.1007\/978-3-319-30505-9_26"},{"key":"e_1_2_1_23_1","doi-asserted-by":"publisher","DOI":"10.1145\/3278532.3278556"},{"key":"e_1_2_1_24_1","doi-asserted-by":"publisher","DOI":"10.1145\/2987443.2987482"},{"key":"e_1_2_1_25_1","doi-asserted-by":"crossref","unstructured":"Yakov Rekhter Tony Li and Susan Hares. 2006. A Border Gateway Protocol 4 (BGP-4). RFC 4271. (2006).  Yakov Rekhter Tony Li and Susan Hares. 2006. A Border Gateway Protocol 4 (BGP-4). RFC 4271. (2006).","DOI":"10.17487\/rfc4271"},{"key":"e_1_2_1_26_1","unstructured":"RIPE Atlas. [n. d.]. https:\/\/atlas.ripe.net. ([n. d.]).  RIPE Atlas. [n. d.]. https:\/\/atlas.ripe.net. ([n. d.])."},{"key":"e_1_2_1_27_1","unstructured":"RIPE Geoloc. [n. d.]. https:\/\/stat.ripe.net\/widget\/geoloc. ([n. d.]).  RIPE Geoloc. 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