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xStack
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DGS-3120 Series Managed Switch Hardware Installation Guide
Chapter 1 Introduction
Switch Description
Features
Ports
Front Panel Components
LED Indicators
Rear Panel Description
Side Panel Description
Switch Description
D-Link's DGS-3120 Series is a high performance member of the D-Link xStack
® edge switches to core gigabit switches, the xStack
family. Ranging from 10/100Mbps
®
switch family has been future-proof designed to provide fault tolerance, flexibility, port density, robust security, and maximum throughput, with a user-friendly management interface for the networking professional.
The Switch is the latest member of D-Link’s entry level Layer 2 managed switch product line.
The Series features the following list of switches:
• DGS-3120-24TC: 24-Port 10/100/1000Base-T with 4 Combo Copper/SFP ports, L2 Stackable Management
Switch.
• DGS-3120-24SC: 8-Port 10/100/1000Base-T /SFP combo with 16 SFP ports, L2 Stackable Management
Switch.
• DGS-3120-24SC-DC: 8-Port 10/100/1000Base-T /SFP Combo with 16 SFP ports, L2 Stackable Management
Switch.
• DGS-3120-24PC: 24-Port 10/100/1000Base-T with 4 Combo Copper/SFP PoE ports, L2 Stackable
Management Switch.
• DGS-3120-48TC: 48-Port 10/100/1000Base-T with 4 Combo Copper/SFP ports, L2 Stackable Management
Switch.
• DGS-3120-48PC: 48-Port 10/100/1000Base-T with 4 Combo Copper/SFP PoE ports, L2 Stackable
Management Switch.
This cost effective Gigabit Switch provides an affordable solution for administrators to upgrade their networks to high speed Gigabit connections. The dedicated stacking ports offer up to 40G bi-directional bandwidth, which makes the
DGS-3120 Series also suitable as a backbone solution for SMBs. The advanced ACL and user authentication functions on the Switch extend the network security coverage from core to the edge. A unique D-Link Safeguard
Engine protects the DGS-3120 Series from the threat of worms and viruses, thereby increasing overall reliability, serviceability, and availability
The Switch has a combination of 1000BASE-T ports and SFP ports that may be used in uplinking various network devices to the Switch, including PCs, hubs and other switches to provide a gigabit Ethernet uplink in full-duplex mode.
The SFP (Small Form Factor Portable) combo ports are used with fiber-optical transceiver cabling in order to uplink various other networking devices for a gigabit link that may span great distances.
These SFP ports support full-duplex transmissions and can be used with the following transceivers:
• DEM-310GT (1000BASE-LX)
• DEM-311GT (1000BASE-SX)
• DEM-312GT2 (1000BASE-SX)
• DEM-314GT (1000BASE-LH)
• DEM-315GT (1000BASE-ZX)
• DEM-210 (Single Mode 100BASE-FX)
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DGS-3120 Series Managed Switch Hardware Installation Guide
• DEM-211 (Multi Mode 100BASE-FX)
• DGS-712 (1G Copper, 1000BASE-T)
WDM transceivers supported include:
• DEM-330T (TX-1550/RX-1310 nm)
• DEM-330R (TX-1310/RX-1550 nm)
• DEM-331T (TX-1550/RX-1310 nm)
• DEM-331R (TX1310/RX-1550 nm)
• DEM-220T (100BASE-BX-D, TX-1550/RX-1310 nm)
• DEM-220R (100BASE-BX-U, TX-1310/RX-1550 nm)
Features
The list below highlights the significant protocols and features supported by the Switch.
• IEEE 802.3
• IEEE 802.3z
• IEEE 802.3x Flow Control in full-duplex compliant
• IEEE 802.3u
• IEEE 802.3ab
• IEEE 802.1p Priority Queues
• IEEE 802.3ad Link Aggregation Control Protocol for up to 32 groups per device, eight ports per group
• IEEE 802.1X Port-based and Host-based Access Control
• IEEE 802.1Q VLAN
• IEEE 802.1D Spanning Tree, IEEE 802.1w Rapid Spanning Tree and IEEE 802.1s Multiple Spanning Tree support
• Jumbo frame to 13K Bytes
• Access Control List: Ingress ACL up to 768 profiles and 1.5K rules and Egress ACL up to 256 profiles and 512 rules
• ISM VLAN of up to five dedicated ISM VLANs, up to 512 multicast address ranges per ISM VLAN
• DHCP local relay
• Single IP Management
• Access Authentication Control utilizing TACACS, XTACACS, TACACS+, and RADIUS protocols
• Compound Authentication
• Power saving mode
• Simple Network Time Protocol (SNTP)
• System Log
• Maximum packet forwarding rate 65.48 million packets per second
• High performance switching engine performs forwarding and filtering at full wire speed up to 88Gps
• Full- and half-duplex for all ports. Full duplex allows the switch port to simultaneously transmit and receive data. It only works with connections to full-duplex-capable end stations and switches. Connections to a hub must take place at half-duplex.
• Unicast, broadcast, and multicast storm control
• Loopback Detection (LBD) v4.0 Trap
• Efficient self-learning and address recognition mechanism enables forwarding rate at wire speed
• Address table: up to 16 K
• Packet buffer memory of up to 2 MByte
• Two stacking ports in the rear of the switch
• VLAN Trunking
• Private VLAN
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DGS-3120 Series Managed Switch Hardware Installation Guide
• Maximum of 4K VLAN groups
• 802.1Q (2005 edition)
• GVRP for 4K VLAN (255 dynamic) groups
• Voice VLAN by MAC address
• VLAN tagging based on PVID
• Up to 1024 MAC-based VLAN entries
• IGMP Snooping v1/v2/v3
• MLD Snooping v1 and v2
• Up to 1024 IGMP/MLD snooping groups
• SNMP v1/v2/v3
• SNMP over IPv6
• Secure Sockets Layer (SSL) v1/v2/v3
• Secure Shell (SSH) v2
• Port Mirroring
• LLDP
• NLB
• Traffic segmentation
• D-Link Safeguard Engine
• Web-based Access Control (WAC)
• MAC-based Access Control (MAC)
• Guest VLAN
• Microsoft® NAP--IPv4 and IPv6, 802.1X NAP, and DHCP NAP
• Database Failover
• RADIUS accounting
• RADIUS authentication for management access
• TACACS+ authentication for management access
• User account privilege for management access—four levels of user accounts
• DHCP server screening
• ARP spoofing prevention
• MIB support for: o RFC 1213 MIB II o RFC 4188 Bridge MIB o RFC 1907 SNMPv2 MIB o RFC 2819 RMON MIB o RFC 2021 RMONv2 MIB o RFC 2571 SNMP MIB, RFC 2572 SNMP MIB, RFC 2573 SNMP MIB o RFC 2574 SNMPv3 MIB o RFC 2575 VACM for SNMP MIB o RFC 2576 SNMPv1, v2 & v3 MIB o RFC 2665 Ether-like MIB o RFC 4363 P-Bridge MIB and Q-Bridge MIB o RFC 2863 IF MIB o RFC 2618 RADIUS Authentication Client MIB o RFC 2620 RADIUS Accounting Client MIB o RFC 2925 Ping and Traceroute MIB o Private MIB o RFC 4293 IPv6 MIB o RFC 4022 TCP MIB o LLDP MIB
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DGS-3120 Series Managed Switch Hardware Installation Guide o LLDP-DOT1-MIB, LLDP-DOT3-MIB
• Provides parallel LED display for port status such as link/act, speed, etc.
• Web-based GUI compatible with most major browsers, including Internet Explorer (version 5.5 and later),
Netscape (version 8.0 and later), Mozilla Firefox (version 2.0 and later), Safari (version 4.0 and later), and Google
Chrome (version 6.0 and later).
Ports
DGS-3120-24TC
DGS-3120-24SC
DGS-3120-24SC-DC
DGS-3120-24PC
Twenty-four 10/100/1000BASE-T ports.
Four 1000BASE-T/SFP Combo Copper/SFP ports.
Two dedicated, high speed stacking ports.
Eight 10/100/1000BASE-T/SFP Combo Copper/SFP ports.
Sixteen SFP ports.
Two dedicated, high speed stacking ports.
Eight 10/100/1000BASE-T/SFP Combo Copper/SFP ports.
Sixteen SFP ports.
Two dedicated, high speed stacking ports.
Twenty-four 10/100/1000BASE-T PoE ports.
Four 1000BASE-T/SFP Combo Copper/SFP PoE ports.
Two dedicated, high speed stacking ports.
DGS-3120-48TC
DGS-3120-48PC
Fourty-eight 10/100/1000BASE-T ports.
Four 1000BASE-T/SFP Combo Copper/SFP ports.
Two dedicated, high speed stacking ports.
Fourty-eight 10/100/1000BASE-T PoE ports.
Four 1000BASE-T/SFP Combo Copper/SFP PoE ports.
Two dedicated, high speed stacking ports.
• All the switches are equipt with one RJ-45 Console port (a special console cable with a DB9 interface is provided to connect the Switch to a PC)
• All the switches, except for the DGS-3120-24SC-DC, are equipt with one Redundant Power Supply (RPS) outlet for optional external RPS
NOTE: For customers interested in D-View, D-Link Corporation's proprietary SNMP management software, go to http://dview.dlink.com.tw/ and download the software and manual.
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DGS-3120 Series Managed Switch Hardware Installation Guide
Front Panel Components
The front panel of the Switch consists of LED indicators for Power, Console, RPS, Master, S1, S2, Fan, SD, Stack ID, and for Link/Act for each port on the Switch including SFP port LEDs. A separate table below describes LED indicators in more detail. The DGS-3120-24PC and DGS-3120-48PC switches are equipt with an additional PoE light, to indication whether the ports are running in Power over Ethernet mode.
Figure 1- 1. Front panel view of the DGS-3120-24TC
Figure 1- 2. Front panel view of the DGS-3120-24SC
Figure 1- 3. Front panel view of the DGS-3120-24SC-DC
Figure 1- 4. Front panel view of the DGS-3120-24PC
Figure 1- 5. Front panel view of the DGS-3120-48TC
Figure 1- 6. Front panel view of the DGS-3120-48PC
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DGS-3120 Series Managed Switch Hardware Installation Guide
LED Indicators
The Switch front panel presents LED indicators for Power, Console, RPS, Master (stack control), S1, S2, Fan, SD,
Stack ID and Link/Act indicators for all ports including the Gigabit Ethernet ports. The DGS-3120-24PC and DGS-
3120-48PC switches are equipt with an additional PoE light, to indication whether the ports are running in Power over
Ethernet mode.
Figure 1- 7. LED indicators for the DGS-3120-24TC
Figure 1- 8. LED indicators for the DGS-3120-24SC
Figure 1- 9. LED indicators for the DGS-3120-24SC-DC
Figure 1- 10. LED indicators for the DGS-3120-24PC
Figure 1- 11. LED indicators for the DGS-3120-48TC
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DGS-3120 Series Managed Switch Hardware Installation Guide
LED
Power
Console
RPS
Master
S1
S2
Fan
SD
Stack ID
Link/Act LEDs
PoE
Figure 1- 12. LED indicators for the DGS-3120-48PC
Description
This LED will light green after powering the Switch on to indicate the ready state of the device. The indicator is dark when the Switch is no longer receiving power (i.e. powered off).
This LED will blink green during the Power-On Self Test (POST). When the POST is finished, the LED goes dark. The indicator will light steady green when a user is logged in through the console port.
This LED will light green if the Redundant Powers Supply is in use. If the indicator is off, the RPS is not in use. When the switch detects that the RPS is connected, the light will be blinking. This LED in not available on the DGS-3120-24SC-DC switch.
For standalone Switches, this will light green. For stacked Switches, a solid Green light indicates this unit is the Master of the stack.
A solid green stacking port 1 LED indicates there is a secure connection (or link) to an
Ethernet device at any of the ports. The LED blinks green where there is reception or transmission of data occurring at a port. A darkened LED indicates no link on this stacking module.
A solid green stacking port 2 LED indicates there is a secure connection (or link) to an
Ethernet device at any of the ports. The LED blinks green where there is reception or transmission of data occurring at a port. A darkened LED indicates no link on this stacking module.
This LED blinks red when a fan fails. No light indicates all fans are working normally.
This LED will light green if a Secure Digital (SD) card is plugged in. When the Switch is reading or writing, the indicator will blink green. No light LED means there is no link. A solid red LED indicates SD card failure.
For standalone Switches, this will display number “1”. For stacked Switches, this indicates the position in the stacking box ID. The box ID is assigned either by the user
(static mode) or by the system (automatic mode). When “1” to “6” is displayed, this indicates the stacking position of the switch. An “H” indicates the device was assigned as the stacking Master. “h“ means the device was selected to be the Backup Master. A
“G” is displayed when the Safeguard Engine feature enters the exhausted mode.
The Switch has LED indicators for Link and Activity. The LED will light steady green when there is a secure connection (or link) to a 1000Mbps Ethernet device at any of the ports, or steady orange when there is a secure connection (or link) to a 10/100Mbps
Ethernet device at any of the ports. The LED will blink green when a 1000Mbps port is active, or blink orange when a 10/100Mbps port is active. The LED remains dark when there is no link or activity.
Only the DGS-3120-24PC and the DGS-3120-48PC switches are equipt with a PoE
LED. When this light is on with a solid green light, it means that the corresponding ports are feeding power to the PoE devices plugged in. When this light is on with a solid orange light, it means that the port is in an error condition state. When this light is off, it means that the ports are not supplying power to the devices plugged into the ports.
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DGS-3120 Series Managed Switch Hardware Installation Guide
Rear Panel Description
The rear panel contains an AC power connector, an outlet for an external redundant power supply, and two stacking ports.
Figure 1- 13. Rear panel view of the DGS-3120-24TC
Figure 1- 14. Rear panel view of the DGS-3120-24SC
Figure 1- 15. Rear panel view of the DGS-3120-24SC-DC
Figure 1- 16. Rear panel view of the DGS-3120-24PC
Figure 1- 17. Rear panel view of the DGS-3120-48TC
Figure 1- 18. Rear panel view of the DGS-3120-48PC
The AC power connector is a standard three-pronged connector that supports the power cord. Plug-in the female connector of the provided power cord into this socket, and the male side of the cord into a power outlet. The Switch automatically adjusts the power setting to any supply voltage in the range from 100 ~ 240 VAC at 50 ~ 60 Hz. An optional external Redundant Power Supply (DPS-200 for DGS-3120-24TC/SC, DPS-500/DPS-500DC for DGS-3120-
48TC, and DPS-700 for DGS-3120-24PC/48PC) can be plugged into the RPS outlet displayed above. When the internal power fails, this optional external RPS will take over all the power immediately and automatically. There are also two stacking ports on the rear panel. These dedicated stacking ports are specially designed for high speed switch stacking. The Switch supports a stacking cable length of up to 3 meters.
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DGS-3120 Series Managed Switch Hardware Installation Guide
Side Panel Description
The system heat vents located on each side dissipate heat. Do not block these openings. Leave at least 6 inches of space at the rear and sides of the Switch for proper ventilation. Be reminded that without proper heat dissipation and air circulation, system components might overheat, which could lead to system failure or even severely damage components.
Figure 1- 19. Identical side panels of the DGS-3120-24TC, DGS-3120-24SC, and DGS-3120-24SC-DC
Figure 1- 20. Identical side panels of the DGS-3120-24PC
Figure 1- 21. Identical side panels of the DGS-3120-48TC
Figure 1- 22. Identical side panels of the DGS-3120-48PC
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