Review Article
Software-Defined Networks for Optical Networks Using Flexible Orchestration: Advances, Challenges, and Opportunities
Table 6
Pros and cons of standard virtualised architectures.
| Pros | Cons |
| Deliver several dedicated virtual networks in place of infrastructures that are shared in networking domain | Issues with dedicated virtual networks that are not dependent on a single service provider | Each application can be tailored on demand for customers | Issues with traffic demand model and topologically data from physical networks hence less service provisioning | Compatible with current optical components such as wavelength selective switches and ROADMs | Difficulty in resource management and underutilisation | ā | Uses only two main dedicated controllers (father and local domain controller) | ā | General design challenges in a VON-based SDNs |
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