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Randy Bush

Based in Star Alliance / SkyTeam

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About the author

Randy Bush is a Research Fellow and Network Operator at Internet Initiative Japan, Japan's first commercial ISP. He specializes in network measurement especially routing, network security, routing protocols, and IPv6 deployment. He is also a lead designer of the BGP security effort. Randy has been in computing for over 50 years, and has a few decades of Internet operations experience. He was the engineering founder of Verio, which is now NTT/Verio. He has been heavily involved in transferring Internet technologies to developing economies for over 25 years. He was a chair of the IETF WG on the DNS for a decade and served as a member of the IESG, as co-chair of the IETF Operations and Management Area. Randy was the first Chair of the NANOG Steering Committee, a co-founder of AfNOG, on the founding Board of Directors of ARIN, helped start AfriNIC, and has participated in APNIC, RIPE, et alia since each was founded. see http://archive.psg.com/papers.html

Links & Social

Website: https://psg.com/~randy

Should You Update Your Route Flap Damping Parameters?

BGP Route Flap Damping (RFD) is recommended to suppress BGP churn. Default RFD configurations in routers have been shown to be harmful. Current configuration recommendations by the IETF and RIPE, however, are based on a study from 2010 which focused on IPv4 only. This article presents our recent me…

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Route Flap Damping in the Wild?!

BGP Route Flap Damping (RFD) and its use has been a controversial topic in the past. Recommendations have been revised multiple times over the past two decades and still differ from vendor default values. In this article we dive into how we measured Route Flap Damping in the real-world, uncover whi…

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Measuring the Adoption of RPKI Route Origin Validation

The number of Resource Certificates and ROAs is steadily growing, especially in the RIPE NCC service region. However, it remains unclear how widely BGP speakers on the Internet are actually using route origin validation (ROV) to drop or de-preference invalid announcements.

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Detecting Network Outages with RIPE Atlas

This post describes a technique to detect bursty TCP disconnections, and how it can be used on RIPE Atlas data to better detect outages in the Internet.

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BGP Table Fragmentation: What & Who?

BGP routing table growth is one of the major Internet scaling issues, and prefix deaggregation is thought to be a major contributor to table growth. In this work we quantify the fragmentation of the routing table by the type of IP prefix. We observe that the proportion of deaggregated prefixes has …

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Ethics of RIPE Atlas Measurements

This article is intended to make RIPE Atlas users aware of ethical issues that could arise when using RIPE Atlas. We do not intend to propose any new formal processes or procedures to address the relevant ethical issues, but we do want to encourage members of the RIPE Atlas community to consider th…

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Reducing the BGP Table Size - A Fairy Tale

The issue of the relative sizes of the IPv4 and IPv6 Internet in BGP came up during discussion at the APNIC/APRICOT meeting held in Auckland, New Zealand earlier this year.

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Pinpointing Delay and Forwarding Anomalies Using RIPE Atlas Built-in Measurements - Or How I Learned to Stop Worrying and Love the Built-Ins

Detecting network disruptions is a recurring problem. Clearly locating performance degradation is an important step in debugging and subsequently fixing connectivity issues.

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A Tale of BGP Collectors and Customer Cones

When operators and researchers use data from BGP route collectors such as RIS and Route Views, it's not easy to tell if a path announced to a collector is an ISP's customer cone, an internal route, or one learned from peering or transit. In this post we look at what information we can currently get…

routing +1
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