Dahua 24xGE SFP + 4xCombo GE + 4x 10G SFP+ L2 Plus Managed Switch S5500-24GF4XF-E

Dahua 24xGE SFP + 4xCombo GE + 4x 10G SFP+ L2 Plus Managed Switch S5500-24GF4XF-E

The DH S5500 series switches are new-generation smart 1000M Ethernet switch products that provide high performance and high security. This series provides advanced hardware processing capabilities, diversified service features, large-capacity 1000M access ports, and high-density
uplink capabilities, to meet requirements of users on high-density access and high-performance aggregation on campus networks. The DH S5500 series switches use pioneering energy-saving chips and innovative architecture design. This achieves minimum power consumption of the
1000M switches, and provides users with leading-edge green network access products that achieve environment-friendliness and energy saving.

High Scalability, Protecting Investments
The DH S5500 series switches have four fixed ports, which provide users with a cost-effective 10G uplink capability while implementing high-density 1000M access, thereby protecting user investments. The DH S5500 series switches also support the Intelligent Resilient Framework
2 (IRF2). Nine devices can be stacked, to form a logical entity. In this way, device capacity can be smoothly expanded along with network development, providing users with high flexibility and expansion capabilities.

IRF2
The DH S5500 series switches support the IRF2 technology. Specifically, multiple physical devices are interconnected and virtualized into one logical device. In other words, users can manage and use the multiple devices like one single device. The IRF technology brings about the following benefits:

Streamlined management
After an IRF is built, a user can log in to the unified logical device by connecting to any port on any device, to manage the entire intelligent resilient system and all member devices in the system by configuring a single device, and it is not required to be physically connected each
member device to configure and manage the member devices.

Streamlined services
Various control protocols run in a logical device formed by using the IRF also work as a single device. For example, routing protocols perform unified computation as a single device. The cross-device link aggregation technology is increasingly widely applied, and can replace
original Spanning Tree Protocols. This saves a large quantity of exchanges between devices, streamlining network running, and reducing the convergence time during network flapping.

Elastic expansion
Elastic expansion can be implemented as required, to protect user investments. The IRF supports hot swapping of devices.

High reliability
The IRF is high reliably in terms of links, devices, and protocols. Physical ports of member devices can be aggregated, and physical connections between the IRF system and upper/lower-layer devices also support the aggregation function. This improves link reliability by means of multi-link backup. The IRF system consists of multiple member devices. If the
master device is faulty, the IRF system automatically elects a new master device in a quick manner, to ensure service continuity of the IRF system, thereby implementing 1:N backup of devices. The IRF system backups up protocol configuration information to all other member devices in real time by using the protocol hot backup function, thereby implementing 1:N protocol reliability.

Automatic adjustment of fan rotation speed according to temperature changes
These features significantly improve network reliability, and the network convergence time is not affected even if multiple services and a large traffic are carried on the network, ensuring normal service operation.

Environment Friendliness and Energy Saving
The DH S5500 series switches use pioneering energy-saving chips and innovative architecture design. This achieves minimum power consumption of the 1000M switches. In addition, "zero-noise" silence design is implemented on some models, providing users with leading-edge green network access products that achieve environment friendliness and energy saving, thereby reducing maintenance costs for users.

High performance
For high-end switches, the improvements in performance and port density are constrained by the hardware structure. The performance and port density of the IRF system are equal to the
sum of performance and port densities of all member devices in the IRF system. Therefore, by using the IRF technology, the switching capacity and user port density of devices can be easily multiplied, to significantly improve device performance.

Complete Security Control Policies
The DH S5500 series switches support multiple authentication functions. In a network environment with various clients, different clients support different access authentication modes. For example, some clients (for example, printer terminals) support only MAC address authentication, some user host perform 802.1X authentication, and some user hosts expects only portal authentication for web access. To flexibly meet the multiple authentication requirements in this type of network environment, the clients provide the Guest VLAN function. In this case, an authorized access terminal is allowed to access only a specified resource and use a corresponding policy, for example, obtaining an 802.1x client, upgrading a client, or obtaining other upgrade programs. The DH S5500 series switches support the Secure Shell V2 (SSH V2) feature, which can provide secure information assurance and powerful authentication functions, to protect the Ethernet switches from attacks such as IP address spoofing and plaintext password interception.

ARP attacks and ARP viruses are greatest threats to local area network security. The DH S5500 series switches support a variety of ARP defense functions, such as APR detection and ARP rate limiting. The ARP detection function is used to check user legality and ARP packet validity, and the ARP rating limiting function is used to protect CPUs from being affected by a large quantity of ARP packets.

Diversified QoS Policies
- The DH S5500 series switches support the following QoS features: Packet filtering on layer 2 (L2) to layer 4 (L4)
- Flow classification based on the source MAC address, destination MAC address, source IP address, destination IP address, TCP/UDP port, IP protocol type, and VLAN
- Flexible queue scheduling algorithms, including SP, WRR, and SP+WRR, which can be configured based on both ports and queues

High Availability
The DH S5500 provides device-level and link-level multi-level reliability protection. The hardware supports the following protection techniques:
- Over-current protection, over-voltage protection, and over-heat protection technologies
- Fault detection and alarm reporting concerning the power source and fans