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Ürün Özellikleri:
Stackable 4-Port Switch + combo Gig copper/SFP + 2 slots for 8 port uplinks
EOL
Genel Özellikler:

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

* Use of the SFP GBIC will disable their corresponding built-in 10/100/1000BASE-T connections.


Number of Expansion Slots
2

Port Modules
(for expansion slots)
- DEM-540: 4 stacking ports supporting DES-3226S switches
- DEM-340MG: 4 SFP GBIC 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

GBIC (SFP) 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
VLAN

- IEEE 802.1Q Tagged VLAN
- Port-based VLAN (non-overlapping)
- GARP/GVRP
- Asymmetric VLAN (L2 only)
- Maximum number of VLANs: 255

*  4 K maximum number of VLANs in stand-alone mode will be supported in next firmware upgrade

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
- 802.1s Multiple Spanning Tree *

* Multiple Spanning Tree supported in next firmware release

Multicast
- IGMP v.1, v .2
- IGMP Snooping

Port Trunk
- Number of ports per trunk: 8 (max.)
- Number of trunk per switch: 6 (max.) (in DGS-3212SR stand-alone 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

MAC Address Learning
- Dynamic entries: automatic update
- Static entries: user-defined

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)
- 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


Fiziksel Özellikler

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
- BSMI Class A

Safety
CSA International

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