Switch Administrable D-LINK DGS-3120-24PC-SI, 20 puertos 1000Base-t y 4 puertos 1000Base-T/SFP, soporte PoE 802.3af y 802.3at, en 24 puertos, soporta SD Card para respaldo de configuracion e informacion, soporta Voice VLAN.

1 Console port
20 Puertos 10/100/1000Base-T
4 Puertos combo 10/100/1000BASE-T/SFP

Cumple con las siguientes normas:
IEEE 802.3 compliance
IEEE 802.3u compliance
IEEE 802.3ab compliance
IEEE 802.3z compliance
IEEE 802.3af compliance
Support Half/Full-Duplex operations
Auto-negotiation
Auto MDI/MDIX
IEEE 802.3x Flow Control support for Full-Duplex mode, Back Pressure when Half-Duplex mode, and Head-of-line blocking prevention

DEM-310GT (1000BASE-LX, Single-mode, 10km)
DEM-311GT (1000BASE-SX, Mutli-mode, 500m)
DEM-312GT2 (1000BASE-SX, Multi-mode, 2km)
DEM-314GT (1000BASE-LH, Single-mode, 50km)
DEM-315GT (1000BASE-ZX, Single-mode, 80km)
DEM-210 (100BASE-FX, Single-mode, 15km)
DEM-211 (100BASE-FX, Multi-mode, 2km)

DEM-330T (TX-1550/RX-1310nm), up to 10km, Single-Mode
DEM-330R (TX-1310/RX-1550 nm), up to 10km, Single-Mode
DEM-331T (TX-1550/RX-1310 nm) , up to 40km, Single-Mode
DEM-331R (TX-1310/RX-1550 nm), up to 40km, Single-Mode
DEM-220T (TX-1550/RX-1310nm), up to 20km, Single-Mode
DEM-220R (TX-1310/RX-1550 nm), up to 20km, Single-Mode

400MHz

65.48 million packets per second

Physical Stacking
Virtual Stacking / Clustering

• IEEE 802.3af compliance
• Provides up to 15.4W per 10/100/1000M port
• Default power budget is 370W.
• PoE power budget is configurable when connecting with DPS-700 external RPS.

Two modes are supported when connecting with DPS-700

• Redundant Mode:

System PoE power budget is 370W.

• Expansion Mode:

System PoE power budget is 740W.

• Auto discover the connection of PD and immediately provides power
• Auto disable port if the port current is over 350mA
• Provide the power following the classification below

Class                 Usage                Max power used by PD
     0                  Default                            15.4W
     1                Optional                            4.0W
     2                Optional                            7.0W
     3                Optional                          15.4W
     4               Reserved                          15.4W

• IEEE 802.3at compliance
• Provides up to 30W per 10/100/1000M port
• Default power budget is 370W.
• PoE power budget is configurable when connecting with DPS-700 external RPS.

Two modes are supported when connecting with DPS-700

• Redundant Mode:

System PoE power budget is 370W.

• Expansion Mode:

System PoE power budget is 740W.

• Auto discovers the connection of PD and immediately provides power
• Auto disable port if the port current is over 625mA
• Overload current detection range (ICUT parameter) is about 625mA (Default)
• Feeding power over pin 1, 2, 3, 6 of 8 wires of UTP cables

Support 16K MAC Address Table;
Support 256 static MAC addresses
Support 128 static multicast addresses

802.3x when full duplex
Back Pressure when half duplex
Head-of-line blocking prevention

Support 802.1D STP 2004 Edition
Support 802.1w RSTP (IEEE802.1D-2004)
Support 802.1s MSTP (IEEE802.1Q-2005)
Support max. 16 MSTP Instances
Support per port/device BPDU filtering
Support Root Restriction (defined in 802.1Q-2005)

D-Link Loopback Detection 4.03
STP independent
Support per port/per VLAN shutdown

Support max 32 groups per device, 8 ports per group
High availability LACP to prevent single or multiple ports failure in an aggregation channel.
Support cross-stack trunk
Support following load sharing mechanisms
- L2 hash : Source MAC + Destination MAC
- L3 hash : Source IP + Destination IP (IPv4/IPv6)
- L4 hash : Source Port + Destination Port

Port Mirroring
- Support 4 mirroring groups
- One-to-one mode
- Many-to-one mode
- Port mirroring for Tx/Rx/Both
Flow-Based (ACL) mirroring
RSPAN

Support IGMP v1, v2, v3 snooping
Up to 1024 IGMP snooping groups
Support 128 static multicast group per system
Be able to forward the multicast traffic from the multicast-enabled router only
Be able to forbid multicast traffic on specific ports (can config forbid_mc_router)
Support IGMP snooping per VLAN
Support flooding/filtering mode for non-joined multicast traffic.
Support host-Based IGMP Snooping fast leave
Load-balance the multicast traffic when working with LACP or trunk
Support Report Suppression. When IGMP report suppression is enabled, the switch sends the first IGMP report from all hosts for a group to all the multicast routers.  The switch does NOT send remaining IGMP reports for the group to the multicast routers.  This feature prevents duplicate reports from being sent to the multicast devices

Support MLD snooping v1, v2
Up to 1024 MLD snooping groups
Support 128 static multicast addresses per system
Be able to forward the multicast traffic from the multicast-enabled router only
Be able to forbid multicast traffic on specific ports (can config  forbid_mc_router)
Per VLAN MLD snooping
Support flooding/filtering mode for non-joined multicast traffic.

Total 4K VLAN groups;
Max. (4094 static/ 255 dynamic) VLAN groups
Configurable VID from 1~4094
TPID: 0x8100

Support up to 16 protocol-Based VLAN
Support 16 protocol-Based VLAN per physical port
Be able to configure 802.1Q and 802.1v untagged port on same physical port
Support multiple VLANs for each protocol
Support VLAN classification Based on ether type

Support 802.1Q 2005 edition

Support 255 dynamic groups
GVRP advertisement on both dynamic and static VLAN
GVRP can be enabled/disabled by per port/VLAN/system basis

Support VLAN tagging Based on PVID
Support VLAN classification Based on default port priority

Support at least 1024 entries

Support up to 5 dedicated ISM VLANs
Support up to 512 multicast address ranges per ISM VLAN
Be able to filter unknown multicast packets per ISM VLAN
Support tagged and untagged members while the port still belongs to:
- Port-Based VLAN
- 802.1Q VLAN whose VID is different from ISM VLAN
The IGMP snooping function in ISM VLAN is independent from global IGMP snooping
Support IGMP v1/v2/v3 and MLD v1/v2
Support up to 80 ISM profiles per system, each ISM VLAN can bind up to 16 profiles
Each ISM profile can support up to 32 address ranges

Be able to classify packets according to following contents:
- VID
- 802.1p priority
- MAC address
- Ether type
- DSCP
- Protocol type
- IPv4 address
- TCP/UDP port number
- User defined packet content

Port-Based bandwidth control
- Minimum granularity: 64Kb/s
- Ingress / Egress bandwidth control
Flow-Based bandwidth control
- Minimum granularity: 64Kb/s
- Ingress / Egress bandwidth control

Support v1/v2/v3
Support IPv4 protocols

Min granularity: 2 pps
Allows the configuration of 5 minutes recovery timer for shutdown ports

Support local/RADIUS database
- Maximum 1000 MACs per port in local database
- Maximum 1000 MACs per device in local database
- Maximum 1000 MACs per port in RADIUS database
- Maximum 1000 MACs per device in RADIUS database
Support logout and logout timer functions
Support Port-Based authentication
Support Host-Based authentication
Can authenticate client MAC address simultaneously
Identity driven policy assignment: Can assign VLAN, ingress/egress bandwidth control, ACL and 802.1p default priority to the port according to the attributes dispatched from RADIUS server.
WAC 2.0
- Support HTTPS
- Detailed port auth_state description

Support following authentication methods:
- Local database
- RADIUS
- TACACS
- XTACAS
- TACACS+

Be able to enable trusted host by application:
- Telnet
- SNMP
- HTTP
- HTTPS
- SSH
- Ping
Ability to input not only one IP for host, but IP address of the network with variable mask.
Support up to 30 trust hosts IPv4/v6 ranges

Per Device:
-Power
-Console
-RPS
-Fan Err
-Master
-7-Segment LED
-Port LED Mode Indicator
Per 10/100/1000 Mbps Port: -Link/Act/Speed Mode
Per SFP Port: -Link/Act
SD