Support

Technical Specifications 

Hardware

Device Ports

• 4 built-in 10/100/1000BASE-T ports
• 4 built-in combo SFP (mini GBIC) *
• RS-232 console port

^{* Use of the SFP will disable their corresponding built-in 10/100/1000BASE-T connections. These Gigabit ports can be configured for server/backbone attachments, or for switch stacking.}

Number of Expansion Slots

• 2

Port Modules (for expansion slots)

• DEM-340MG: 4 SFP slots
• DEM-340T: 4 10/100/1000BASE-T ports

Port Standard/Function Support

• IEEE 802.3 10BASE-T/802.3u 100BASE-TX/802.3ab 1000BASE-T
• ANSI/IEEE 802.3 NWay auto-negotiation
• IEEE 802.3x Flow Control
• Auto MDI/MDIX
• Port mirroring

SFP (Mini GBIC) Support

• IEEE 802.3z 1000BASE-LX (DEM-310GT transceiver)
• IEEE 802.3z 1000BASE-SX (DEM-311GT transceiver)
• IEEE 802.3z 1000BASE-LH (DEM-314GT transceiver)
• IEEE 802.3z 1000BASE-ZX (DEM-315GT transceiver)

Forwarding Rate

• 17.8Mpps (max.)

Switch Fabric

• 24Gbps

Diagnostic LEDs

Per device:

• Power
• Console
• RPS

Per RJ-45 port:

• Speed
• Link/Act

Per SFP port:

• Link/Act

Software

IP Routing

• IP v4 support
• IP Fragmentation support
• Routing protocols supported:   
•   Static routing   
•   RIP-1, RIP-2   
•   OSPF v.2

VLAN

• IEEE 802.1Q Tagged VLAN
• Port-based VLAN (non-overlapping)
• GARP/GVRP
• Maximum number of VLANs: 4K  

Priority Queues (CoS)

• Standard: IEEE 802.1p
• Number of queues: 8 per port

Traffic Classification (CoS)

Can be based on user-definable application types:

• TOS
• Diffserv (DSCP)
• Port-based
• MAC address
• IP address
• TCP/UDP port number

Network Access Security

• 802.1x user authentication: port-based and MAC-based
• RADIUS client for 802.1x support
• SSH2 *
• SSL *
• TACACS/TACACS+/XTACACS *
• Cisco-like port security
• Multi-layer Access Control List (ACL) based on:   
• MAC   
• VLAN
• 802.1p
• Diffserv (DSCP)
• IP address   
• Protocol type
• TCP/UDP destination port number

^{* Functions available in next firmware upgrade}

Spanning Tree

• 802.1D compatible
• 802.1w Rapid Spanning Tree

Multicast

• IGMP v2
• IGMP Snooping
• DVMRP
• PIM-DM

Port Trunk

• Number of ports per trunk: 8 (max.)
• Number of trunk per switch: 6 (max.) (in DGS-3312SR standalone mode only)
• Trunking mode: static
• Operation mode: load sharing
• 802.3ad LACP support

Performance

Transmission Method

• Store-and-forward

MAC Address Table

• 16K entries per device

Routing Table

• 2K entries per device

MAC Address Learning

• Dynamic entries: automatic update
• Static entries: user-defined

Layer 2 Packet Filtering/Forwarding Rates (half duplex)

• 1,488,100 pps per port (max.)

RAM Buffer

• 1MB per device

Jumbo Frame Size

• Up to 9,216bytes

Broadcast Storm Control

• Rate control of Broadcast, unknown Multicast and Unicast packets

Configuration & Management

Management Support

• SNMP v.1, v.3
• Web-based management
• CLI (command line interface)
• RMON monitoring
• Telnet server
• Telnet remote control console
• SYSLOG
• Web GUI traffic monitoring
• Password enable
• Web MAC address browsing
• SNMP trap on MAC notification
• SNTP
• IP filtering on management interface

MIBs

• MIB-II (RFC 1213)
• Bridge MIB (RFC 1493)
• RMON MIB (RFC 1757)
• RIP (RFC 1724)
• OSPF (RFC 1850)
• CIDR (RFC 2096)
• 802.1Q VLAN/802.1p MIB (RFC 2674)
• IGMP MIB (RFC 2933)
• IF (Interface) MIB (RFC 2233)
• Ethernet-like MIB (RFC 1643)
• D-Link enterprise MIB 

RMON Groups

• 1, 2, 3, 9 (Alarm, Statistics, History, Event)

IP Number Self-identification

• Through DHCP client, Bootp client

Firmware Upgrade

• TFTP client

Console Port

• DB-9 RS-232 DCE

Physical & Environmental

Power Input 

• 100 to 120 VAC, 50/60 Hz or 200 to 240 VAC, 50/60 Hz
• Internal universal power supply

Redundant Power Backup Support

• Connector to connect to external redundant power supply

Power Consumption

• 30 watts (max.) (without expansion modules)

Ventilation

• 60 x 60 mm DC fans x 1

Operating Temperature

• 0 ° to 40 °C

Storage Temperature

• -25° to 55 °C

Humidity

• 10% to 95% non-condensing

Dimensions

• 440 (W) x 309 (D) x 44 mm (H) (device only)
• 19-inch rack-mount width, 1 U height

Weight

• 4.4 kg (device only, without expansion modules)

Emission (EMI)

• FCC Class A
• CE Class A
• C-Tick

Safety

• CSA International

Ordering Information 

Modular L3 Gigabit Switch

DGS-3312SR      

• 4 10/100/1000BASE-T ports,
• 4 combo SFP (mini GBIC), 2 expansion slots, redundant power support

Optional Expansion Module

DEM-340MG

• 4 SFP GBIC slots

DEM-340T

• 4 10/100/1000BASE-T ports

Optional SFP Transceiver

DEM-310GT  

• SFP transceiver for 1000BASE-LX, single-mode fiber, max. distance 10km, 3.3V

DEM-311GT   

• SFP transceiver for 1000BASE-SX, multi-mode fiber, max. distance 550m, 3.3V

DEM-314GT   

• SFP transceiver for 1000BASE-LHX, single-mode fiber, max. distance 40km, 3.3V

DEM-315GT   

• SFP transceiver for 1000BASE-ZX, single-mode fiber, max. distance 80km, 3.3V

Optional Redundant Power Supply

DPS-200

• 60 watts redundant power supply

DPS-800

• 2-slot redundant power supply chassis

DPS-900

• 8-slot redundant power supply chassis