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Quiet Gigabit Workgroup Switch

  • Full support for port-based policies
  • Flexible mounting options with small footprint and quiet design
  • Extended operating temperature range for installations with poor ventilation

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12-port tabletop edge/workgroup switch with Gigabit Ethernet and optional dynamic policy support, capable of operating with fans turned off.

Quiet design and robust solution from the boardroom to the classroom.

The Extreme Networks D2 is a high-performance Gigabit Ethernet workgroup switch with a high tolerance for environmental temperatures up to 140°F/60°C. With fans that only operate at extreme temperatures, the D2’s very quiet design makes it an ideal solution for classrooms and conference rooms, as well as warm locations with limited ventilation. By providing LEDs on the front, back, and top of the switch, the D2 offers very flexible mounting options (rack, wall, desktop, or under-tabletop), including an integral Kensington lock and an optional lock box for secure mounting.

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The D2 workgroup switch doesn’t compromise on features to meet its quiet design.

All of the management and security features you would expect from an enterprise-grade switch are available in this versatile form. Robust Quality of Service (QoS) features support the converged applications required to drive your business. Intelligent queuing ensures that mission-critical applications receive the priority to access much needed network resources.

  • Business-oriented, policy-based security* by user, application, protocol, port, or VLAN
  • Multiple user authentication methods via IEEE 802.1X, Web portal, and/or MAC address
  • Full support for port-based policies (PC+Phone)
  • Acceptable use policy enforcement when deployed with Extreme Networks Network Management Suite (NMS)
  • Rapid detection, isolation, and remediation of threats when deployed with Extreme Networks NMS and Intrusion Prevention System (IPS)
Proactive protection services
  • MAC address lockdown/lockout
  • Worm and virus quarantine via optional policy license
  • Source port pairing
  • ARP broadcast protection
  • BPDU port protection
  • DHCP service protection
  • Aggregate capacity: D2 performs at wire speed per port and provides switching capacity up to 17.86Mpps throughput and 24Gbps bandwidth
  • Address table size: up to 16,000 addresses are supported
  • Hardware queues: 8 hardware queues per port are supported
  • Secure management: authenticated and encrypted SNMPv3 support in addition to SSHv2, Secure Copy, Secure FTP, and SSL
  • Policy support: the D2 supports the creation of 100 unique policy rules and 10 unique masks per port
  • Port mirroring: mirrors ingress/egress traffic from switch port(s) to a local or remote device for further traffic analysis or compliance purposes
  • RMON: provides advanced monitoring and reporting capabilities for statistics, history, alarms, events, filter, and packet capture. Note: packet capture is sampling only; packet capture/filter sampling is disabled by default and cannot be enabled on the same interface concurrently with port mirroring
  • IEEE 802.1AB Link Layer Discovery Protocol (LLDP): automated device discovery protocol for easy mapping by network management applications
  • Alias/node table: dynamically updated local directory of attached users and devices used to locate and resolve IP addresses to MAC addresses throughout the network
  • LLDP-MED (Media Endpoint Discovery): a standard extension of LLDP that stores values for parameters such as QoS and VLAN to automatically configure and provision network devices such as IP phones
  • IP multicast snooping (data-driven IGMP): automatically prevents flooding of IP multicast traffic
  • IEEE 802.3af Power over Ethernet: 100 watts of PoE power is available for distribution across all twelve 10/100/1000 ports with the base PoE switch; a maximum of 15.4 W (Class 3) can be delivered to IEEE 802.3af compliant PoE powered devices such as IP phones, wireless access points, and security cameras
  • 15.4 watts of PoE power: can be provided to all twelve ports with the D2-HIPWR-POE option
  • PoE power management: prioritize which ports receive power and how much power each port may provide
  • Jumbo frames: enables high-performance remote backup and disaster-recovery services
High availability
  • IEEE 802.1s Multiple Spanning Tree Protocol: provides high link availability in multiple VLAN environments by allowing multiple spanning trees; encompasses IEEE 802.1D Spanning Tree Protocol and IEEE 802.1w Rapid Spanning Tree Protocol
  • IEEE 802.3ad Link Aggregation Control Protocol (LACP): support up to 6 trunks, each with up to 8 ports per trunk
  • Optional external redundant power supply
Layer 2 Switching
  • IEEE 802.1q VLAN support and tagging: supports up to 1,024 VLANs simultaneously
  • IEEE 802.1v protocol VLANs: isolate select non-IPv4 protocols automatically into their own VLANs
  • GARP VLAN Registration Protocol: allows automatic learning and dynamic assignment of VLANs
Quality of Service (QoS)
  • Traffic classification at layer 2,3,4: enables packet classification and tagging at the network edge based on any of the following attributes: MAC address, physical port, IP address, IP protocol, IP ToS/DSCP, TCP/UDP port, and IP subnet
  • Traffic prioritization: allows real-time traffic classification into eight priority levels mapped to eight hardware queues. Weighted round robin (WRR) or strict priority (SP) queuing are supported, which keeps low-priority traffic from being completely starved of bandwidth. Support for IP Differentiated Services Code Point (DSCP) enables the D2 to enforce requested service levels

Business alignment
  • Quiet design and flexible mounting options support evolving workgroup environments
  • High-availability design with redundant power (including PoE) assures reliable network operations
  • Aligns network resource utilization with business goals and priorities
Operational efficiency
  • Temperature-tolerant design enables quiet operation and flexible physical placement of equipment
  • Role-based policies simplify addition of new users
  • Centralized management reduces network operational expenses
  • Integral security without performance degradation
  • Network security maintained concurrently with user mobility
  • Network resources securely allocated according to user operational roles
Support and service
  • Industry-leading customer satisfaction and first-call resolution rates
  • Personalized services, including site surveys, network design, installation, and training
  • Lifetime warranty
12-port 10/100/1000 switch with 2 SFP combo ports and power brick12-port 10/100/1000 PoE switch with 2 SFP combo ports and 130-watt power brick
12 fixed RJ-45 10/100/1000 ports (Type 10Base-T, Type 100Base-TX, Type 1000Base-T)12 fixed PoE RJ-45 10/100/1000 ports (Type 10Base-T, Type 100Base-TX, Type 1000Base-T)
Power Supplies
The switch supports redundant power feeds so two power “bricks” can be used in cases where redundancy is required. See Accessories for additional power bricks.The switch supports redundant power feeds so two power “bricks” can be used in cases where redundancy is required. See Accessories for additional power bricks.
Form Factor
Fixed standalone. Two D2s side by side can be mounted in a 19-inch rack.Fixed standalone. Two D2s side by side can be mounted in a 19-inch rack.
Memory and Processor
32MB flash memory
32MB flash memory
Switching capacity24.0Gbps24.0Gbps
PoE power per port (watts)NAAt 40° C or less, an average of 8.3W per port. Up to 15.4W for Class 3 support on any port up to a system maximum of 100 watts of PoE power.
Total system PoE power decreases 2.16W per °C increase over 40° C.
IEEE 802.3af CompliantNAYes
NMS Policy Manager, Automated Security Manager (additional license), command line interface, web browserNMS Policy Manager, Automated Security Manager (additional license), command line interface, web browser
Physical Specs
Dimensions (H x W x D)1.60" x 8.25" x 8.50"
4.06 cm x 20.9 cm x 21.5 cm
1.60" x 8.25" x 8.50"
4.06 cm x 20.9 cm x 21.5 cm
Net Weight (g/lb)3.65 lb / 1.66 kg4.02 lb / 1.82 kg
MTBF (Hrs)105,34782,532
Thermal Output (BTUs/Hr)86.35 (BTUs/Hr)107.5 (BTUs/Hr)
Environmental Specifications
Power Requirements
 D2G124-12 D2G124-12P
Input Voltage100-240 VAC100-240 VAC
Input Frequency50-60Hz50-60Hz
Input Current2.0A3.2A
Power Consumption (watts)25W31.5W
Operating Temperature (C/F)0° C to 60° C / 32° F to 140° F0° C to 50° C / 32° F to 122° F
Temperature (C/F)
-40° C to 70° C / -40° F to 158° F-40° C to 70° C / -40° F to 158° F
Operating Humidity5% to 95% non-condensing5% to 95% non-condensing
Agency and Standards Specifications
Standard Safety (UL)UL/CB/LVDUL/CB/LVD
Electromagnetic Compatibility
Standard EMCCE / FCC Class A / VCCI / C-Tick /BSMICE / FCC Class A / VCCI / C-Tick /BSMI
Non-Operational Shock and DropISTA 2AISTA 2A