24 Ports IEEE 802.3af PoE Supports Industry Standards: 802.1p, 802.1Q, 802.1D CPU DoS Protection to Ensure Uptime Supports 802.1x User Authentication for Security Easy Management through GUI , Smart Console Utility, and SNMP v1

D-Link DES-1228P
Web Smart 24-Port PoE 10/100 + (4) 1000BASE-T Ports + 2 Combo Ports Switch

The DES-1228P Web Smart Switch from D-Link is a cost-effective solution for the small and medium business that requires basic management features like VLAN segmentation, QoS prioritization, and secure 802.1x login and authentication, showcased in a low-cost, easy-to-configure, and GUI managed ‘smart’ business solution. The DES-1228P comes with 24 10/100BASE-TX Fast Ethernet ports, 4 1000Base-T ports and 2 combo ports for flexible copper/fiber Gigabit connections to storage area network devices, servers, or core switching solutions. It supports 24 ports of PoE up to 15.4 watts to power PD devices such as APs, phones, and cameras. The Graphical User Interface allows you to implement Quality of Service (QoS), VLANs and security without having to go through complex command line management usually found in other managed switches.

D-Link Safeguard Engine
The DES-1228P incorporates advanced mechanisms to detect an attack against the central processing unit of the switch and to take corrective action on the attacking interface. When a Denial of Service (DoS) attack is waged against the DES-1228P, the D-Link Safeguard Engine detects the threat and prevents overload of the central processor thus insuring network integrity and helping to maintain open network bandwidth channels.

IEEE 802.3af PoE
The DES-1228P features 24 10/100BASE-TX ports that support IEEE 802.3af PoE protocol. Each of the 24 PoE ports can supply up to 15.4 Watts, a total PoE-budget of 170 Watts, allowing users to attach any IEEE 802.3af compliant device to the DES-1228P without needing additional power. This eliminates the need of having to place networking devices within close proximity of a power outlet and minimizes cable clutter in awkward places such as ceilings or walls. For devices that are not IEEE 802.3af compliant, a PoE adapter, such as D-Link’s DWL-P50 can be used to enable the non-compliant device to receive power through the DES-1228P.

Port Trunking
The DES-1228P supports static port trunking of up to 6 groups of 8 ports per device. Ports can be combined together to create multi-link loadsharing aggregated trunks to a server or a network backbone. To expand the network, you can also make use of link aggregation to eliminate bottlenecks between the cascaded switches.

802.1Q VLANs
The DES-1228P provides support for 802.1Q VLANs for improved security and bandwidth utilization. VLANs work by segmenting broadcast domains thus reducing network congestion due to constant network broadcasting. In addition VLANs provide a means of securing each broadcast domain from all others. This in turn prevents users on one VLAN from gaining access to resources on other network segments. VLANs can be configured to segment departmental resources. For example, VLANs can be implemented on an SMB network to prevent the Marketing department from gaining access to secure resources in the Accounting department.

SNMP Management
The DES-1228P supports SNMP v1. SNMP is a useful tool in managing and controlling SNMP supported network devices. SNMP enables the DES-1228P to be polled to provide valuable information about the status of the unit and send traps on abnormal events. This sharing of vital management information saves time and money.

802.1p Priority Tagging
Like 802.1Q VLAN tagging, 802.1p places a tag in a frame to indicate the priority of the frame. A tag will represent a priority of 0-7 and an 802.1Q compliant switch can read this tag and prioritize traffic accordingly. This differs from port based QoS in that in Port-Based QoS all traffic entering a specific port is prioritized the same way with the same value. In 802.1p a port can receive frames with varying priority tags and classify them based on these tags. A VoIP phone that supports 802.1p can assign a priority to its VoIP traffic and when it enters the switch the switch can give it a higher priority so that voice traffic is always clear and jitter-free.

802.1D Spanning Tree
Spanning Tree provides protection from unintentional cabling loops forming within a network infrastructure. Loops are dangerous in that they create an unending circle where broadcast and multicast traffic propagate across the network in an endless loop. This creates a storm of traffic that overwhelms the network and brings traffic to a crawl. 802.1D Spanning tree detects and breaks these loops ensuring network uptime.

IGMP Snooping
IGMP Snooping allows for the forwarding of multicast packets such as streaming audio, video, without increasing network broadcast congestion. By snooping IGMP registration information within a frame, a list of workstations who have joined the multicast group is created. This list then allows the switch to intelligently forward packets to only the appropriate member workstations.

802.1x Authentication
802.1x Authentication provides a secure means to allow users to log onto your network. When used in conjunction with a RADIUS server, 802.1x requires each user workstation attached to the DES-1228P to provide a username and password before gaining access to the local area network.

Operational Simplicity
The DES-1228P supports a wide array of plug-and-play features:

• 10/100Mbps auto-negotiation
  
• Universal UTP cable recognition for auto straight-through or crossover cable detection (Auto MDI/MDI-X)
  
• Full/Half duplex support
  
• IEEE standards support
  

Managing the DES-1228P has never been easier. Using its built in browser-based management interface, configuring the switch takes only minutes. With full color graphic pictures, diagrams and easy to understand navigation menus, configuring the DES-1228P with the features you require is as easy as surfing the net. The DES-1228P supports many of today’s most sought after features like 802.1p priority queuing, 802.1Q VLANs, port trunking, 802.1x authentication, port mirroring, SNMP, spanning tree, link aggregation, IGMP Snooping, broadcast storm control, and more.