Latency inflation with MPLS-based traffic engineering

Authors:
Abhinav Pathak;Ming Zhang;Y. Charlie Hu;Ratul Mahajan;Dave Maltz
Affiliations:
Purdue University, West Lafayette, IN, USA;Microsoft Research, Redmond, WA, USA;Purdue University, West Lafayette, IN, USA;Microsoft Research, Redmond, WA, USA;Microsoft, Redmond, WA, USA
Venue:
Proceedings of the 2011 ACM SIGCOMM conference on Internet measurement conference
Year:
2011

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Abstract

While MPLS has been extensively deployed in recent years, little is known about its behavior in practice. We examine the performance of MPLS in Microsoft's online service network (MSN), a well-provisioned multi-continent production network connecting tens of data centers. Using detailed traces collected over a 2-month period, we find that many paths experience significantly inflated latencies. We correlate occurrences of latency inflation with routers, links, and DC-pairs. This analysis sheds light on the causes of latency inflation and suggests several avenues for alleviating the problem.