TY - GEN
T1 - Decentralized consistent updates in SDN
AU - Nguyen, Thanh Dang
AU - Chiesa, Marco
AU - Canini, Marco
N1 - Publisher Copyright:
© 2017 Copyright held by the owner/author(s).
PY - 2017/4/3
Y1 - 2017/4/3
N2 - We present ez-Segway, a decentralized mechanism to consistently and quickly update the network state while preventing forwarding anomalies (loops and blackholes) and avoiding link congestion. In our design, the centralized SDN controller only pre-computes information needed by the switches during the update execution. This information is distributed to the switches, which use partial knowledge and direct message passing to efficiently realize the update. This separation of concerns has the key benefit of improving update performance as the communication and computation bottlenecks at the controller are removed. Our evaluations via network emulations and large-scale simulations demonstrate the efficiency of ez-Segway, which compared to a centralized approach, improves network update times by up to 45% and 57% at the median and the 99th percentile, respectively. A deployment of a system prototype in a real OpenFlow switch and an implementation in P4 demonstrate the feasibility and low overhead of implementing simple network update functionality within switches.
AB - We present ez-Segway, a decentralized mechanism to consistently and quickly update the network state while preventing forwarding anomalies (loops and blackholes) and avoiding link congestion. In our design, the centralized SDN controller only pre-computes information needed by the switches during the update execution. This information is distributed to the switches, which use partial knowledge and direct message passing to efficiently realize the update. This separation of concerns has the key benefit of improving update performance as the communication and computation bottlenecks at the controller are removed. Our evaluations via network emulations and large-scale simulations demonstrate the efficiency of ez-Segway, which compared to a centralized approach, improves network update times by up to 45% and 57% at the median and the 99th percentile, respectively. A deployment of a system prototype in a real OpenFlow switch and an implementation in P4 demonstrate the feasibility and low overhead of implementing simple network update functionality within switches.
UR - http://www.scopus.com/inward/record.url?scp=85018978485&partnerID=8YFLogxK
U2 - 10.1145/3050220.3050224
DO - 10.1145/3050220.3050224
M3 - Conference contribution
AN - SCOPUS:85018978485
T3 - SOSR 2017 - Proceedings of the 2017 Symposium on SDN Research
SP - 21
EP - 33
BT - SOSR 2017 - Proceedings of the 2017 Symposium on SDN Research
PB - Association for Computing Machinery, Inc
T2 - 2017 Symposium on SDN Research, SOSR 2017
Y2 - 3 April 2017 through 4 April 2017
ER -