In this way, when configuring aggregation and access switches to be managed by the controller, you can configure the core switch as the management subnet gateway of the aggregation and access switches, and configure the management VLAN auto-negotiation function with. In this way, when configuring aggregation and access switches to be managed by the controller, you can configure the core switch as the management subnet gateway of the aggregation and access switches, and configure the management VLAN auto-negotiation function with. Access devices downstream to the core layer can automatically go online through Zero Touch Provisioning (ZTP). This section describes three automatic deployment modes, which can be selected based on the site requirements. Mode 1: Import information using the network plan template. Device and link. Knowing the roles of core, aggregation, and access switches in contemporary network topology becomes essential to create effective and scalable networks. By bundling multiple network connections into a single high-bandwidth link, aggregation switches help. An Aggregation or "Top-of-Rack" switch is designed to connect everything in a rack at high speeds, then have an even bigger pipe out to the rest of the network. Which means, there will be a fiber link from WS-C2960G-48TC-L to the first core and fiber link from WS-C2960G-48TC-L to the second core. By design, it therefore provides resiliency because it will always be deployed in pairs of switches and comes with a recommendation to deploy only dual hot swappable power supplies and redundant fans in each switch to.