Final published version
Licence: CC BY: Creative Commons Attribution 4.0 International License
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
}
TY - GEN
T1 - Investigating Location-aware Advertisements in Anycast IP Networks
AU - Kastanakis, Savvas
AU - Giotsas, Vasileios
AU - Livadariu, Ioana
AU - Suri, Neeraj
PY - 2024/7/23
Y1 - 2024/7/23
N2 - Anycast routing offers transparent service replication by distributing traffic across multiple Points of Presence (PoP). By advertising the same IP prefix from each PoP via BGP, traffic is routed to the nearest server, minimizing user latency. Despite its perceived benefits, prior research suggests IP anycast often falls short, with clients routed to distant replicas, increasing latency. Selective announcements made by anycast ASes contribute to this inefficiency, serving as a traffic engineering strategy to control incoming traffic flows.In this work, we aim to shed light on the prevalence and rationale behind selective announcements in anycast networks. Through empirical evidence, we identify their significant adoption, primarily driven by the geolocation-agnostic BGP best path selection process. In particular, we observe that 84.06% of anycast ASes announce at least one of their anycast prefixes to a specific subset of their neighbors, whereas 80% of these selective announcers announce 100% of their prefixes selectively. This research represents an initial step towards comprehending the effects of selective and location-based routing policies in anycast IP networks.
AB - Anycast routing offers transparent service replication by distributing traffic across multiple Points of Presence (PoP). By advertising the same IP prefix from each PoP via BGP, traffic is routed to the nearest server, minimizing user latency. Despite its perceived benefits, prior research suggests IP anycast often falls short, with clients routed to distant replicas, increasing latency. Selective announcements made by anycast ASes contribute to this inefficiency, serving as a traffic engineering strategy to control incoming traffic flows.In this work, we aim to shed light on the prevalence and rationale behind selective announcements in anycast networks. Through empirical evidence, we identify their significant adoption, primarily driven by the geolocation-agnostic BGP best path selection process. In particular, we observe that 84.06% of anycast ASes announce at least one of their anycast prefixes to a specific subset of their neighbors, whereas 80% of these selective announcers announce 100% of their prefixes selectively. This research represents an initial step towards comprehending the effects of selective and location-based routing policies in anycast IP networks.
U2 - 10.1145/3673422.3674885
DO - 10.1145/3673422.3674885
M3 - Conference contribution/Paper
SP - 15
EP - 22
BT - ANRW '24: Proceedings of the 2024 Applied Networking Research Workshop
PB - ACM
CY - New York
ER -