The must-have OLAN features can be grouped in three (3) imperative categories:
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Security - things like port isolation, port security, IEEE 802.1x and network access control integration, E911 solutions and publicly available system and security test results
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Ease of use / operational efficiencies - true plug-n-play provisioning, link layer discovery protocol, support of MAC OUI based profiles and interoperating with many different services from many different vendors, like Dante’s audio over IP
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Mission-critical / reliability - Feature such as geo-redundant OLT protection are tremendously important in an enterprise network