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| Content Provider | ACM Digital Library |
|---|---|
| Author | Schmid, Stefan Rost, Matthias Lukovszki, Tamás |
| Abstract | The virtualization and softwarization of modern computer networks offers new opportunities for the simplified management and exible placement of middleboxes as e.g. rewalls and proxies. This paper initiates the study of algorithmically exploiting the exibilities present in virtualized and software-defined networks. Particularly, we are interested in the initial as well as the incremental deployment of middleboxes. We present a deterministic O(log(min{n,k})) approximation algorithm for n-node computer networks, where k is the middlebox capacity. The algorithm is based on optimizing over a submodular function which can be computed efficiently using a fast augmenting path approach. The derived approximation bound is optimal: the underlying problem is computationally hard to approximate within sublogarithmic factors, unless P = NP holds. We additionally present an exact algorithm based on integer programming, and complement our formal analysis with simulations. In particular, we consider the number of used middleboxes and highlight the benefits of the approximation algorithm in incremental deployments. Our approach also finds interesting applications, e.g., in the context of incremental deployment of software-defined networks. |
| Starting Page | 30 |
| Ending Page | 36 |
| Page Count | 7 |
| File Format | |
| ISSN | 01464833 |
| DOI | 10.1145/2875951.2875956 |
| Journal | ACM SIGCOMM Computer Communication Review (CCRV) |
| Volume Number | 46 |
| Issue Number | 1 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 1993-07-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Facility location Software-defined networking Capacitated set cover Network virtualization Np-hardness Nfv |
| Content Type | Text |
| Resource Type | Article |
| Subject | Computer Networks and Communications Software |
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