Data Plane Optimizations in Open Virtual Routers
2011 (English)In: IFIP Networking 2011, Springer Verlag, Heidelberg , 2011, 379-392 p.Conference paper (Refereed)
A major challenge in network virtualization is to virtualize the components constituting the network, in particular the routers. In the work presented here, we focus on how to use open source Linux software in combination with commodity hardware to build open virtual routers. A general approach in open router virtualization is to run multiple virtual instances in parallel on the same PC hardware. This means that virtual components are combined in the router’s data plane, which can result in performance penalty. In this paper, we investigate the impact of the design of virtual network devices on router performance in Linux namespace environment. We identify performance bottlenecks along the packet data path. We suggest design changes to improve performance. In particular, we investigate modifications of the ―macvlan‖ device, and analyze the performance improvements in terms of packet forwarding. We also investigate how the number of virtual routers and virtual devices within a physical machine influence performance.
Place, publisher, year, edition, pages
Springer Verlag, Heidelberg , 2011. 379-392 p.
network virtualization, virtual router, SoftIRQ, NAPI, Softnet API
IdentifiersURN: urn:nbn:se:kth:diva-49616DOI: 10.1007/978-3-642-20757-0_30ScopusID: 2-s2.0-79956037282ISBN: 978-3-642-20756-3OAI: oai:DiVA.org:kth-49616DiVA: diva2:459906
10th International IFIP TC 6 Networking Conference Valencia, Spain, May 2011
QC 201201092012-01-092011-11-282012-01-09Bibliographically approved