D-Link DGS-1520-28MP 28-Port Multi-Gigabit PoE+ Layer 3 Stackable Switch

Power Faster Access Devices with Room to Grow The D-Link DGS-1520-28MP combines 20 × gigabit rj45 poe+ and 4 × 2.5gbe rj45 poe+ access with two 10GBASE-T and 2 10G SFP+ uplinks. It brings switching, dynamic routing and physical stacking into a rackmount platform for business networks that need organised connectivity, clear traffic separation and practical room for expansion. A shared 370W PoE budget supplies compatible access points, IP cameras and other powered devices, with up to 30W per PoE port. VLANs, access controls and monitoring tools help keep day-to-day administration consistent. Choose the uplink optics, cables and any optional power equipment to suit the installation; published link rates describe interface capability rather than guaranteed application throughput. Highlights Connectivity That Suits the Installation 20 × Gigabit RJ45 PoE+ and 4 × 2.5GbE RJ45 PoE+ 2 × 10GBASE-T and 2 × 10G SFP+ uplinks 370W shared PoE budget with IEEE 802.3af/at support Control and Resilience IPv4/IPv6 Layer 3 routing including OSPF and RIP Physical stacking with ring or chain topology VLAN segmentation and eight traffic-priority queues Administration and Protection Web interface and command-line administration 802.1X authentication and DHCP snooping 5-year warranty Key Features Build Around the Right Access Ports 20 Gigabit copper ports and 4 2.5GbE ports connect the devices that support everyday work. The faster 2.5GbE access ports can serve suitable wireless access points or other multi-gigabit devices without treating every connection as a 10G link. Select cabling and endpoint interfaces for the intended speed. Power Devices from a Planned Budget IEEE 802.3af/at PoE supports compatible powered devices with up to 30W per port, shared within the 370W system budget. Add the actual maximum demand of the connected devices and allow sensible operating headroom. The switch does not provide 60W or 90W IEEE 802.3bt power from its access ports. Grow with a Co-ordinated Physical Stack Up to eight switches in a physical ring or chain stack with up to 80 Gbps stacking bandwidth. Stacking uses the available 10G interfaces. A stack can simplify administration across multiple units and support a redundant ring design when correctly cabled. Physical stacking is different from virtual management, and the available forwarding and uplink design still need to match the workload. Route Between Network Segments IPv4/IPv6 routing supports static routes, RIP/RIPng and OSPFv2/v3, with policy-based routing and VRRP tools for a suitably designed network. Use these functions to organise traffic between departments, services or VLANs while keeping access policies deliberate. Route-table limits and the upstream firewall or gateway remain part of the overall design. Keep Shared Services Organised VLANs, link aggregation, spanning-tree protocols and Ethernet Ring Protection Switching help structure a resilient Layer 2 network. Eight QoS queues provide traffic-priority controls, while IGMP and MLD snooping help manage multicast distribution. The resulting performance depends on a sound topology and correctly configured endpoints. Make Administration Easier to Maintain Web administration, serial CLI, SSH and SNMP provide several ways to manage the switch. Authentication, DHCP snooping, access-control lists and monitoring tools help support consistent operations. Dual images and configuration files provide useful options when planning controlled firmware changes. Summary The DGS-1520-28MP brings multi-gigabit PoE+ access, 10G uplinks and Layer 3 management together in a stackable business switch. Its value is in a balanced network design: suitable access links, deliberate segmentation, properly sized uplinks and a realistic PoE budget. Select compatible optics and any optional power equipment around the exact deployment. Frequently Asked Questions Which Ports Provide 10-Gigabit Connections?ExpandCollapse Two 10GBASE-T ports and 2 SFP+ slots provide the 10G uplink interfaces. The 24 access ports are 20 Gigabit and 4 2.5GbE RJ45 connections. Console ports are for administration rather than extra data connections. How Much PoE Power Is Available?ExpandCollapse The switch provides a 370W shared PoE budget with up to 30W per compatible IEEE 802.3af/at access port. Individual port limits and the total budget both apply. Check every powered device and allow headroom before choosing the switch. How Many Switches Can Be Stacked?ExpandCollapse Up to eight switches in a physical ring or chain stack with up to 80 Gbps stacking bandwidth. Stacking uses the available 10G interfaces. Are SFP Modules and Stacking Cables Included?ExpandCollapse Select compatible optical modules or direct-attach cables separately for the intended link. Match the transceiver standard, fibre type, reach and switch compatibility. Where a 10G interface is used for stacking, include that allocation in the port plan. Can the Switch Route Between VLANs?ExpandCollapse Yes. The documented Layer 3 functions include IPv4/IPv6 static routing, RIP/RIPng and OSPFv2/v3, alongside VLAN segmentation and access controls. It is a managed switch rather than a complete substitute for the internet gateway, firewall or security services. What Should Be Checked Before Installation?ExpandCollapse Confirm the rack space, ventilation, mains supply, uplink media and connected-device PoE demand. The warranty is 5 years. Optional backup-power equipment and optics require their own exact compatibility check. 続きを読む