New-generation Environment-friendly & Energy-saving Ethernet Switches

> High Performance and Scalability
> Diversified Security Policies
> Enhanced Multiservice Capabilities
> Professional Lightning Protection Functions
> Environment Friendliness and Energy Saving
> Ease of Use in Network Management
Technical Specification
Model DH-S5500-48GT4GF
Switching capacity 256 Gbit/s
Packet forwarding rate 78Mpps
Management port One console port
Fixed port 48 x 10/100/1000Base-T Ethernet port

4 x 1000Base-X Ethernet port

Port aggregation Supports the following port aggregation features:


●Manual port aggregation

●A maximum of eight ports in each aggregation group

Layer-2 ring network protocol Supports STP, RSTP, and MSTP.
VLAN Supports the following VLAN features:

●Port-based VLANs (4,000 VLANs)

●MAC address–based VLANs

●Protocol-based VLANs


●QinQ and flexible QinQ

●VLAN mapping

●Guest VLANs

DHCP Supports the following DHCP features:

●DHCP Server

●DHCP Client

●DHCP Relay

●DHCP Snooping

●DHCP Snooping Option82

IPv4 Supports IPv4 static routing, RIP, and OSPF.
IPv6 Supports the following IPv6 features:

●IPv4 and IPv6 dual-protocol stack

●IPv6 static routing


●Pingv6, Telnetv6, FTPv6, TFTPv6, and ICMPv6

Multicast Supports the following multicast features:

●IGMP Snooping and fast leave

●MLD Snooping

●Multicast VLANs

Stacking Supports hybrid stacking of a maximum of 32 devices.
Mirroring Supports port mirroring and flow mirroring.
ACL Supports the following ACL features:

●Packet filtering on L2 to L4

●Match of the previous 80 bytes in a packet

●ACL definition based on the source MAC address, destination MAC address, source IP address, destination IP address, IP protocol type, TCP/UDP port, TCP/UDP port scope, and VLAN

●ACL issuance based on ports or VLANs

●ACLs based on time ranges

●Hardware-based IPv6 ACL and QoS

QoS Supports the following QoS features:

●Diff-Serv QoS

●Eight output queues on each port

●802.1P/DSCP priority mapping

●Queue scheduling mechanisms

●Priority marking and remarking

●Flow-based packet filtering

●Flow-based redirection

●Flow-based rate limiting

●Voice VLANs

Security Supports the following security features:

●Level-based user management and password protection

●Guest VLANs

●IEEE 802.1X authentication and centralized MAC address authentication

●Rapid EAD deployment

●AAA, RADIUS, and HWTACACS authentication

●Restriction on the number of learned MAC addresses

●MAC address black holes

●SSH 2.0, providing secure encrypted channels for user login

●SSL, ensuring the security of data transmission


●Validity verification of SAVI source addresses

●Port isolation

●Rate limiting for ARP packets

●Protection of source IP addresses

●Detection of ARP intrusion

●Defense against DoS attacks

●Suppression of broadcast packets

●Active/Standby data backup mechanism

●IP address + port binding, IP address + MAC address binding, port + MAC address binding, IP address + MAC address + port binding, and IP address + MAC address + port + VLAN binding

●CPU protection

Reliability Supports the following reliability features:

●Ethernet OAM


●Smart Link, for providing efficient and reliable link backup, load sharing and rapid convergence for double-uplink networking

●Monitor Link, for monitoring the uplink status and providing more efficient link backup and switching in conjunction with the Smart Link

●DLDP, for detecting unidirectional available links


System management Supports the following system management features:

●Configuration through the Console, AUX Modem, Telnet, and SSH2.0 CLI

●File downloading and uploading over FTP, TFTP, Xmodem, and SFTP

●SNMP v1/v2c/v3


●Virtual Cable Test (VCT)


●NTP clock

●System operation logs

●Cluster management

●Intelligent management centers

Ambient humidity Operation ambient humidity: 5%–95% (non-condensing)

Storage ambient humidity: 5%–95% (non-condensing)

Environment protection standard China RoHS, and EEE
Weight (full configuration) ≤ 3.4 kg
Static power consumption 20 W
Power consumption (at full load) ≤ 32 W
Input voltage AC: 100 V–240 V AC, 50/60 Hz
Dimensions (length x width x height) (unit: mm) 440 x 238 x 44