Vantage point selection for IPv6 measurements: Benefits and limitations of RIPE Atlas tags
Vantage point selection for IPv6 measurements: Benefits and limitations of RIPE Atlas tags
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IPv6 测量的有利点选择：RIPE Atlas 标签的优点和局限性
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
E. Aben
中科院分区：
文献类型：
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作者：
Vaibhav Bajpai;Steffie Jacob Eravuchira;J. Schönwälder;Robert Kisteleki;E. Aben
RIPE Atlas由约9.1K个探针（截至2017年1月）组成，连接在核心、接入和家庭网络中。RIPE Atlas最近（2014年7月）引入了一种标记机制，用于细粒度探针的有利点选择。这些标签被细分为用户标签和系统标签。用户标记基于手动过程，该过程在很大程度上依赖于探测主机的主动参与。我们发现，只有2.8%的探针主机会更新它们的用户标签，这可能会导致用户标签随着时间的推移变得陈旧。另一方面，自动分配和频繁更新（每4小时）的系统标签是稳定和准确的。我们通过执行双堆叠探针的有利位置选择来展示系统标签的应用。这一探索表明，通过~ 2.3K（~ 26%）连接的双堆叠探针，RIPE Atlas为IPv6测量研究提供了最丰富的有利位置来源。这些双堆叠探针跨越88个国家，覆盖822个asn。这些双堆叠探针中有83%连接在接入网络中，其中782个探针部署在具有本地IPv6连接的家庭中。这些家用双堆叠探针均匀地分布在DSL、电缆和光纤部署中。我们表明，从这些探针到RIPE Atlas锚点的IPv6延迟似乎与IPv4相当，尽管IPv4的性能略好。通过应用与APNIC IPv6用户人口估计的相关性，我们进一步揭示了代表性不足的国家（如BE和JP），这些国家将从部署更多的IPv6测量研究探针中受益。
RIPE Atlas consists of ∼9.1K probes (as of Jan 2017) connected in core, access and home networks. RIPE Atlas has recently (Jul 2014) introduced a tagging mechanism for fine-grained vantage point selection of probes. These tags are subdivided into user and system tags. User tags are based on a manual process which is largely dependent on proactive participation of probe hosts. We show that only ∼2.8% of probe hosts ever update their user tags which may lead to user tags that tend to become stale over time. System tags on the other hand being automatically assigned and frequently updated (every 4 hours) are stable and accurate. We show an application of system tags by performing a vantage point selection of dual-stacked probes. This exploration reveals that with ∼2.3K (∼26%) connected dual-stacked probes, RIPE Atlas provides the richest source of vantage points for IPv6 measurement studies. These dual-stacked probes span 88 countries and cover 822 ASNs. ∼83% of these dual-stacked probes are connected within access networks with 782 probes deployed at homes with native IPv6 connectivity. These home dual-stacked probes are evenly split across DSL, cable and fibre deployments. We show that IPv6 latencies from these probes to RIPE Atlas anchors appear comparable to IPv4, although IPv4 performs marginally better. By applying a correlation against APNIC IPv6 user population estimate, we further reveal underrepresented countries (such as BE and JP) which would benefit from deployment of more probes for IPv6 measurement studies.