Monitoring and debugging large-scale networks remains a challenging problem. Existing solutions operate at one of the two extremes — systems running at end-hosts (more resources but less visibility into the network) or at network switches (more visibility, but limited resources). We present SwitchPointer, a network monitoring and debugging system that integrates the best of the two worlds. SwitchPointer exploits end-host resources and programmability to collect and monitor telemetry data. The key contribution of SwitchPointer is to efficiently provide network visibility by using switch memory as a “directory service” — each switch, rather than storing the data necessary for monitoring functionalities, stores pointers to end-hosts where relevant telemetry data is stored. We demonstrate, via experiments over real-world testbeds, that SwitchPointer can efficiently monitor and debug network problems, many of which were either hard or even infeasible with existing designs.
|Title of host publication||Proceedings of the 15th USENIX Symposium on Networked Systems Design and Implementation|
|Number of pages||14|
|Publication status||Published - 11 Apr 2018|
|Event||15th USENIX Symposium on Networked Systems Design and Implementation - Renton, United States|
Duration: 9 Apr 2018 → 11 Apr 2018
|Conference||15th USENIX Symposium on Networked Systems Design and Implementation|
|Period||9/04/18 → 11/04/18|