52 Port Managed L2+ Gigabit Switch, physical stacking


The xStack DGS-3420 series of next generation Layer 2+ Gigabit switches delivers performance, flexibility, security, multi-layer QoS, and accessibility, along with redundant power options for SMBs and enterprises. With high Gigabit port densities, Gigabit SFP, 10-Gigabit SFP+ support, and advanced software solutions, these switches can act as either a departmental access layer or aggregation switches to form a multilevel network. Service providers can take advantage of the high SFP density (DGS-3420-28SC) to structure the aggregation of Fiber to the Building (FTTB) networks that can be extended to subscribers’ sites. 

Unparalleled Flexibility

Easily deployed and simple to manage, the DGS-3420 can be stacked with any switch that supports D-Link’s Single IP Management to form a multi-level network with centralized management. The virtual stack can include units located anywhere on the same network domain and uses optional 10-Gigabit uplinks to move intra-stack traffic at 20 Gbps full duplex speeds.

Redundant Ring Stacking

Alternatively, depending on whether linear or ring stacking is implemented, users can use one or two 10-Gigabit SFP+ ports to create a physical stack. 12 units or 576 Gigabit ports can be configured for a stack using direct attach cables to provide high-bandwidth and return on investment.

Security, Performance & Availability

The DGS-3420 Series provides a complete set of security features including L2/L3/L4 multi-layer Access Control Lists and 802.1X user authentication via TACACS+ and RADIUS servers. The DGS-3420 Series offers extensive VLAN support including GVRP and 802.1Q VLAN to enhance security and performance. A robust set of L2/L3/L4 QoS/CoS solutions help ensure that critical network services such as VoIP, ERP, Intranet, and video conferencing are served with proper priority. The series also provides D-Link’s Safeguard Engine to increase the switch’s reliability, serviceability and availability to prevent malicious traffic flooding caused by worms or virus infections. Bandwidth Control can be flexibly set for each port using pre-defined thresholds to assure a committed level of service for end users. For advanced applications, flow-based bandwidth control allows easy fine-tuning of service types based on specific IP addresses or protocols.

IPv6 Technology

The DGS-3420 Series also features comprehensive IPv6 support, including IPv6 Tunneling, ICMPv6, DHCPv6, RIPng, etc. With 10-Gigabit connectivity and IPv6 support, the DGS-3420 Series enables you to future-proof your network for cost efficiency and longevity while meeting the requirements for IPv6 capable network devices in the coming years.

D-Link Green Technology

D-Link is striving to take the lead in developing innovative and power-saving technology that does not sacrifice operational performance or functionality. The DGS-3420 Series implements D-Link Green technology, which includes power saving through link status, smart fan design, increased heat dissipation, and cable length detection. The power saving feature automatically powers down ports that have no link or link partner. The Smart Fan design allows the built-in fans to automatically turn on only at a certain temperature, providing continuous, reliable, and eco-friendly operation of the switch.


Genel Özellikler


• 48-port 10/100/1000BASE-T
• 4-port SFP +

Reserve power supply
• DPS-500

• Management console port: RJ-45
• Control port: 10/100BASE-T
• Signal port
• Slot for SD-cards

• Switching matrix 176 Gbit / s
• The speed of packet forwarding: 130,95 Mpps
• Buffer packets: 2MB
• MAC-address table 16 K records
• Routing table IP v4/v6: 1 K/512 records
• Routing table IP v4/v6 L3: 2K/1K records
• Size of Jumbo Frame: 13 000 bytes

Stacking capabilities
• Supports virtual stacking
  - D-Link Single IP Management
  - Up to 32 devices, united in a virtual stack
  - Up to 20 GB bandwidth
• Physical Stacking
  - Stack technology supports a "chain" and "ring"
  - Bandwidth up to 40 GB
  - Up to 12 devices per stack
Layer 2 + functions
• MAC-address table: 16K
• Flow Control
  - 802.3x Flow Control
  - HOL Blocking Prevention
• Packet size Jumbo Frame: up to 12 Kbytes
• IGMP snooping
• IGMP v1/v2/v3 Snooping
  - IGMP v1/v2/v3 Snooping
  - Support for up to 960 groups Snooping
  - IGMP Fast Leave on ports / hosts
• MLD Snooping
  - MLD v1/v2 Snooping
  - Support for up to 480 groups Snooping
  - MLD Snooping Fast Leave for host-based
• Spanning Tree
  - 802.1D-2004 STP
  - 802.1w RSTP
  - 802.1Q-2005 MSTP
  - Filtering BPDU
  - Root restriction
• Loopback Detection
• 802.3ad Link Aggregation
• Maximum of 32 groups per device
  - 8-port Gigabit or 4 ports of 10G on the device
• Port mirroring:
  - Support for 4 groups of mirroring
  - Mode One-to-One
  - Mode Many-to-One
  - Flow-based Mirroring
• L2 Protocol Tunneling
• ERPS (Ethernet Ring Protection Switching)
• VLAN Group
  - Maximum number of static groups VLAN - 4K
  - Maximum number of dynamic groups VLAN - 255
• 802.1Q Tagged VLAN
• 802.1v Protocol VLAN
• Double VLAN (Q-in-Q)
  - Port-based Q-in-Q S
  - Selective Q-in-Q4
• The MAC-based VLAN
• VLAN Trunking
• 802.1Qbb4
Layer 3 functions
• The number of IP-Interface: 256
• Loopback interface
• IPv6 Tunneling
• Proxy ARP
• Gratuitous ARP
Layer 3
• Up to 1 to record routing devices using protocols IPv4/v6
  - Max. 1K for IPv4 routes
  - Max. 512 for IPv6 routes
• Up to 8K entries sent all devices on the protocols IPv4/v6 L3
  - Max. 2K entries for IPv4
  - Max. 1K entries for IPv6
• Up to 256 entries static routing for IPv4, up to 128 entries for IPv6
•  Equal-Cost Multi-Path Route (ECMP)
• RIP v1/v2
• RIPng
QoS (Quality of Service)
• 802.1p Class of Service (CoS)
• 8 queues
• Processing Queue
  - Strict Mode
  - Mode Weighted Round Robin (WRR)
  - Mode Strict + WRR
• CoS-based
  - Switch Port
  - 802.1p Priority Queues
  - MAC-address
  - IPv4/v6-adresa
  - DSCP
  - Type of protocol
  - Class of IPv6 traffic
  - IPv6 flow labels
  - Non portaTCP / UDP
  - Content package, user-defined
• Support for the following streams
  - Changing the 802.1p priority
  - Change of TOS / DSCP
  - Bandwidth Management
  - Based on the port (Ingress / Egress, at least - 64 kbit / s)
  - Based on the flow (Ingress, at least - 64 kbit / s)
• QoS scheduling
ACL (Access Control Lists)
• Ingress ACL: Support for up to 6 profiles and 256 rules for profile
• Egress ACL: up to 4 profiles, and 128 of the rules on the profile
• ACL-based
  - 802.1p Priority Queues
  - MAC-addresses
  - Ether Type
  - IPv4/v6-adres
  - DSCP
  - Type of protocol
  - Non TCP / UDP port
  - Class trafikaIPv6
  - IPv6 flow labels
  - Content package, user-defined
• ACL Statistics
• ACL schedule
• CPU interface filtering
• SSHv2
• SSL v1/v2/v3
• The Port Security (MAC-64 addresses per port)
• Management of broadcast / multicast / unicast storm
• Traffic segmentation
• The IP-MAC-Port Binding
  - Checking the ARP-packets
  - Checking the IP-packets
  - DHCP Snooping
  - DHCPv6 and NDP Snooping
  - Up to 500 entries per device
• D-Link Safeguard Engine
• DHCP Server Screening
• CPU Interface Filtering
• Preventing ARP Spoofing Attacks
• Protection against attacks BDPU
• 802.1X
  - Access control based on port
  - Access control based on the host
  - Dynamic VLAN assignment
• Access control based on the Web (WAC)
  - Access control based on port
  - Access control based on hostname
  - Dynamic VLAN assignment
• Access control based on MAC-address (MAC)
  - Access control based on port
  - Access control based on hostname
  - Dynamic VLAN assignment
• Japanese-based access control WEB-interface
• Microsoft NAP
  - Support for 802.1X NAP
  - Support for DHCP NAP
• Guest VLAN
• Authentication to access the switch RADIUS and TACACS +
• Accounts with 4 levels of privilege
• Web-interface
• Command line interface (CLI)
• ServerTelnet
• Telnet Client
• TFTP-client
• ZModem
• SNMP v1/v2c/v3
• SNMP Trap
• System Log
• RMON v1
  - Support groups 1,2,3,9
• RMON v2
  - Support ProbeConfig
• sFlow
• BootP / DHCP-client
• Auto DHCP
• DHCP Relay
• DHCP Relay Option 60, 61
• DHCP Relay Option 82
• DHCP-server
• Flash File System
• Supports multiple copies of software (Multiple Images)
• Supports multiple copies of configuration (Multiple Configurations)
• Monitoring the CPU usage
• Debug command
• ICMPv6
• DHCPv6 Client
• DHCPv6 Relay
• DHCPv6 Server
• A trusted host
• Setting the MTU
• Microsoft ® NLB Support
• UDP helper
• 802.3ah Ethernet Link OAM
• 802.3ah D-Link Extension: D-Link
Unidirectional Link Detection (DULD)
• IEEE1588 Precision Time Protocol (PTP)
• Diagnosis of cable
• Connectivity Fault Management (CFM)
• ITU-T Y.1731
• Reduce energy consumption depending on the connection status and cable length
• PoE on schedule
Standards of MIB / IETF
• RFC1213 MIB-II
• RFC1493 Bridge MIB
• RFC1907 SNMPv2 MIB
• RFC2571 ~ 2576 SNMP MIB
• RFC1271, 2819 RMON MIB
• RFC2021 RMON v2 MIB
• RFC2665 Ether-like MIB
• FC2674 802.1p MIB
• RFC2233, 2863 IF MIB
• RFC2618 RADIUS Authentication Client MIB
• RFC1724 RIP v2 MIB
• RFC2096 IP Forwarding Table MIB (CIDR)
• RFC2620 RADIUS Accounting Client MIB
• Ping MIB
• Traceroute MIB
• D-Link Private MIB
• RFC768 UDP
• RFC 791 IP
• RFC 793 TCP
• RFC 826 ARP
• RFC854 Telnet
• RFC951, 1542 BootP
• RFC2068 HTTP
• RFC3056, 5214 IPv6 Tunnel
• RFC2139 RADIUS Accounting
• RFC3176 sFlow
• RFC2598 DiffServ Expedited Forwarding


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