4-Port 1000Base-T Gigabit Managed Stackable Switch with 2 expansion slots

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-540: 4 stacking ports
- 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

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: 255 (Stacking Master mode),
4K (stand-alone mode)
Priority Queues (CoS)
- Standard: IEEE 802.1p
- Number of queues: 4 per port (Stacking Master mode),
8 per port (stand-alone mode)
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
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
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

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