![]() ![]() NetAlytics: Cloud-scale application performance monitoring with SDN and NFV. Guyue Liu, Michael Trotter, Yuxin Ren, and Timothy Wood.In-band network telemetry via programmable dataplanes. Changhoon Kim, Anirudh Sivaraman, Naga Katta, Antonin Bas, Advait Dixit, and Lawrence J Wobker.Veriflow: Verifying network-wide invariants in real time. Ahmed Khurshid, Wenxuan Zhou, Matthew Caesar, and P.Network virtualization and software defined networking for cloud computing: A survey. IPv6 configuration guide, Cisco ios release 12.4. I know what your packet did last hop: Using packet histories to troubleshoot networks. Nikhil Handigol, Brandon Heller, Vimalkumar Jeyakumar, David Mazières, and Nick McKeown.Pingmesh: A large-scale system for data center network latency measurement and analysis. Chuanxiong Guo, Lihua Yuan, Dong Xiang, Yingnong Dang, Ray Huang, Dave Maltz, Zhaoyi Liu, Vin Wang, Bin Pang, Hua Chen, Zhi-Wei Lin, and Varugis Kurien. ![]() Andromeda: Performance, isolation, and velocity at scale in cloud network virtualization. Michael Dalton, David Schultz, Jacob Adriaens, Ahsan Arefin, Anshuman Gupta, Brian Fahs, Dima Rubinstein, Enrique Cauich Zermeno, Erik Rubow, James Alexander Docauer, Jesse Alpert, Jing Ai, Jon Olson, Kevin DeCabooter, Marc de Kruijf, Nan Hua, Nathan Lewis, Nikhil Kasinadhuni, Riccardo Crepaldi, Srinivas Krishnan, Subbaiah Venkata, Yossi Richter, Uday Naik, and Amin Vahdat.Is every flow on the right track?: Inspect SDN forwarding with RuleScope. Kai Bu, Xitao Wen, Bo Yang, Yan Chen, Li Erran Li, and Xiaolin Chen.JStorm: A distributed and fault-tolerant realtime computation system. SDN traceroute: Tracing SDN forwarding without changing network behavior. Kanak Agarwal, Eric Rozner, Colin Dixon, and John Carter.We share experiences of how VTrace efficiently resolves persistent packet loss issues after deploying it in Alibaba Cloud for over 20 months. Experiments are conducted to demonstrate VTrace's low overhead and quick responsiveness. The detailed forwarding situation at each hop is logged and then assembled to perform analysis with an efficient path reconstruction scheme. Utilizing the "fast path-slow path" structure of virtual forwarding devices (VFDs), e.g., vSwitches, VTrace installs several "coloring, matching and logging" rules in VFDs to selectively track the packets of interest and inspect them in depth. To address these challenges, we present VTrace, an automatic diagnostic system for persistent packet loss over the cloud-scale overlay network. The cloud-scale overlay network presents great challenges to achieve this goal with its high network complexity, multi-tenant nature, and diversity of root causes. ![]() ![]() In this paper, we propose to record and analyze the on-site forwarding condition of packets during packet-level tracing. However, existing work is either designed for the physical network or insufficient to present the concrete reason of packet loss. Cloud providers are keen to automatically and quickly determine the root cause of such problems. Persistent packet loss in the cloud-scale overlay network severely compromises tenant experiences. ![]()
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