Delayed Internet routing convergence
Proceedings of the conference on Applications, Technologies, Architectures, and Protocols for Computer Communication
Proceedings of the 2003 conference on Applications, technologies, architectures, and protocols for computer communications
A software approach to distributing requests for DNS service using GNU Zebra, ISC BIND 9 FreeBSD
ATEC '04 Proceedings of the annual conference on USENIX Annual Technical Conference
A measurement-based deployment proposal for IP anycast
Proceedings of the 6th ACM SIGCOMM conference on Internet measurement
Versatile anycasting with mobile IPv6
AAA-IDEA '06 Proceedings of the 2nd international workshop on Advanced architectures and algorithms for internet delivery and applications
Achieving Network Efficient Stateful Anycast Communications
Information Networking. Towards Ubiquitous Networking and Services
Analysis of an anycast based overlay system for scalable service discovery and execution
Computer Networks: The International Journal of Computer and Telecommunications Networking
Two days in the life of the DNS anycast root servers
PAM'07 Proceedings of the 8th international conference on Passive and active network measurement
SCTP for robust and flexible IP anycast services
Computer Communications
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We present the initial results from our evaluation study on the performance implications of anycast in DNS, using four anycast servers deployed at top-level DNS zones. Our results show that 15% to 55% of the queries sent to an anycast group, are answered by the topologically closest server and at least 10% of the queries experience an additional delay in the order of 100ms. While increased availability is one of the supposed advantages of anycast, we found that outages can last up to multiple minutes, mainly due to slow BGP convergence. On the other hand, the number of outages observed was fairly small, suggesting that anycast provides a generally stable service.