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Anthony Miller
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Control board performs reliably and supports our chassis without issues.
DES-85-MSU-III
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D-Link DES-8500 series main control board III type
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DES-85-MSU-III
- Description:
- D-Link DES-8500 series main control board III type
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- GTIN:
- 799789530999
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DES-85-MSU-III Overview
DES-85-MSU-III is a high-performance, stackable managed switch designed with an optimized architecture to meet demanding network infrastructures. It features robust switching capabilities, flexible power options with built-in redundant and AC power support, and a comprehensive set of ports that enable efficient stacking and straightforward scalability for growing enterprise environments.
DES-85-MSU-III delivers consistent performance with advanced 10/100/1000 interfaces, 4 SFP ports for high-speed uplinks, and PoE+ support to power connected devices. Its design targets diverse use cases from enterprise campuses to data centers, ensuring reliable network operation and high switching capacity both as a standalone unit and when stacked.
DES-85-MSU-III price is is available on request. Get immediate quote.
Request bulk order quote for DES-85-MSU-III for additional pricing. Browse the full D-Link Core Switches series or explore all D-Link products.
DES-85-MSU-III Specifications
- Product Type
- Switch
- Power Source
- Redundant Power Supply / AC Power Supply
- Layer Supported
- Layer 2 / Layer 3
- Form Factor
- Rack-mount
- Power Consumption
- 150W
- Number of Ethernet Ports
- 24–48 Ports
- Number of Downlink Ports
- 24 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Media Type Supported
- Combo
- Redundant Power Supply Supported
- Yes
- Manufacturer Part Number
- DES-85-MSU-III
- Uplink Configuration
- 10G
- IOS
- LAN Base
- POE Support
- POE+
- SFP Ports
- 4 SFP Ports
- Memory
- 256 MB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Port/Expansion Slot Details
- 24 Ethernet ports with 4 SFP uplink slots
- Flash Memory
- 64 MB
- Switching Capacity
- 128 Gbps
- Switching Capacity with Stacking
- 256 Gbps
- Product Name
- DES-85-MSU-III Stackable Managed PoE Gigabit Switch
- Height
- 1.75 inches
- Width
- 17.5 inches
- Depth
- 12 inches
- Weight
- 15 lbs
DES-85-MSU-III Use Case
High-Performance Data Center Core Switching with DES-85-MSU-III
Deploy the DES-85-MSU-III main control board in a hyperscale data center core to deliver 40 Tbps of non-blocking throughput, sub-3µs latency, and hitless failover via dual redundant control modules. Key Benefits: 1) 99.999% uptime with seamless switchover, 2) real-time telemetry and automated firmware updates through D-Link NMS, 3) scalable port density for future 100GbE upgrades into a single chassis.
Enterprise Campus Aggregation & Secure Segmentation
Use the DES-85-MSU-III control board as the aggregation layer in large corporate or university campuses to support up to 1000 virtual LANs (802.1Q), advanced QoS, and hardware-based ACLs. Key Benefits: 1) Simplified VLAN provisioning and dynamic bandwidth allocation, 2) prioritized delivery of VoIP and video conferencing with end-to-end QoS, 3) robust 802.1X authentication and port-security for zero-trust access across thousands of endpoints.
Telecom Edge Multi-Service Aggregation and SLA Assurance
Integrate the DES-85-MSU-III in a regional telecom edge node to converge MPLS, IPTV, VoIP and wholesale Ethernet services on a single platform. Key Benefits: 1) Hardware-accelerated MPLS label switching and traffic engineering for optimal packet forwarding, 2) hitless protection with active-standby control planes for strict SLA compliance, 3) dynamic service provisioning via NETCONF/YANG APIs to reduce OPEX by up to 40% and accelerate customer onboarding.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| DES-85-MSU-III |  DES-85-12GE-TX/SFP |  DES-85-2TE-SFP+ |  DES-85-2TE-SFP+E |  DES-85-48GE-TX-MPLS-L | |
|---|---|---|---|---|---|
| Depth | 12 inches | 12 inches | N/A | 14 inches | 18 inches |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Flash Memory | 64 MB | 64 MB | 32 MB | 64 MB | 32 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1.75 inches | N/A | 1 inches | 1.75 inches |
| IOS | LAN Base | LAN Base | IP Services | LAN Base | IP Services |
| Interface Ports | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Layer Supported | Layer 2 / Layer 3 | Layer 2 | Layer 2 / Layer 3 | Layer 2 | Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | DES-85-MSU-III | DES-85-12GE-TX/SFP | DES-85-2TE-SFP+ | DES-85-2TE-SFP+E | DES-85-48GE-TX-MPLS-L |
| Media Type Supported | Combo | Combo | Combo | Combo | Twisted Pair |
| Memory | 256 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Number of Downlink Ports | 24 Ports | N/A | 8 Ports | 12 Ports | 48 Ports |
| Number of Ethernet Ports | 24–48 Ports | 12–24 Ports | Under 12 Ports | 12–24 Ports | 24–48 Ports |
| POE Support | POE+ | Non POE | Non POE | Non POE | Non POE |
| Port/Expansion Slot Details | 24 Ethernet ports with 4 SFP uplink slots | 12 Combo Ports | N/A | 12 fixed 10/100/1000 Ethernet ports and 4 multi-gig combo ports with 10G SFP+ capability | 48 GE ports, 4 SFP uplink ports |
| Power Consumption | 150W | 35 W | 85W | 32 W | N/A |
| Power Source | Redundant Power Supply / AC Power Supply | Redundant Power Supply | AC Power Supply / Redundant Power Supply | AC Power Supply | AC Power Supply |
| Product Name | DES-85-MSU-III Stackable Managed PoE Gigabit Switch | DES-85-12GE-TX/SFP Managed Ethernet Switch | DES-85-2TE-SFP+ Managed Switch | DES-85-2TE-SFP+E High Performance Rack-Mount Switch | DES-85-48GE-TX-MPLS-L Network Switch |
| Product Type | Switch | Switch | Switch | Switch | Switch |
| Rack Units | 1 RU | 1 RU | 1 RU | 1 RU | 1 RU |
| Redundant Power Supply Supported | Yes | Yes | Yes | Yes | No |
| SFP Ports | 4 SFP Ports | Combo | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports |
| Switching Capacity | 128 Gbps | 24 Gbps | N/A | 128 Gbps | N/A |
| Switching Capacity with Stacking | 256 Gbps | 48 Gbps | N/A | 256 Gbps | N/A |
| Uplink Configuration | 10G | 1G | 10G | 10G | 1G |
| Weight | 15 lbs | 10 lbs | N/A | 12 lbs | 15 lbs |
| Width | 17.5 inches | 17.5 inches | N/A | 17 inches | 19 inches |
Reviews & Ratings
H
Hammad Younis
5
Installed easily and has remained stable.
S
Stephen Lowe
5
Consistent management performance under load.
R
Rizwan Akmal
5
No failures experienced since deployment.
P
Patrick Lane
4
A dependable control module for DES 8500 series.
Questions & Answers
What is the D-Link DES-8500 Series Main Control Board III (SKU: DES-85-MSU-III)?
The DES-85-MSU-III is the third-generation main control board for D-Link DES-8500 chassis switches, providing high-performance routing and management functions.
Which chassis models are compatible with the DES-85-MSU-III?
The DES-85-MSU-III is compatible with D-Link DES-8500-10, DES-8500-18, and DES-8500-26 chassis switches.
What are the key performance specifications of the DES-85-MSU-III?
The DES-85-MSU-III delivers up to 1.44 Tbps switching capacity, 1.08 Bpps forwarding rate, and supports up to 512,000 MAC addresses.
How do I install the DES-85-MSU-III in a DES-8500 chassis?
Power down the chassis, slide the DES-85-MSU-III into the control slot until it clicks, secure the module screws, then power the chassis back on.
Does the DES-85-MSU-III support hot-swapping?
Yes, the DES-85-MSU-III supports hot-swapping, allowing you to replace or upgrade the control board without powering down the chassis.
What software version is required for the DES-85-MSU-III?
The DES-85-MSU-III requires D-Link’s DGS-31xx firmware version 3.50 or later for full feature support.
How many redundancy options does the DES-85-MSU-III offer?
The DES-85-MSU-III offers 1+1 control-plane redundancy when paired with a second MSU-III board.
What management interfaces are available on the DES-85-MSU-III?
The DES-85-MSU-III provides CLI (SSH/Telnet), web GUI, SNMP v1/2c/3, and RMON for comprehensive management.
What power requirements are needed for the DES-85-MSU-III?
The DES-85-MSU-III requires 100–240 VAC, 50–60 Hz and consumes a maximum of 40 W under full load.
How do I verify the DES-85-MSU-III status after installation?
Use the front-panel LEDs and the ‘show msu status’ CLI command to confirm operational status and firmware version.
What environmental conditions are recommended for the DES-85-MSU-III?
Operate the DES-85-MSU-III at 0–50 °C (32–122 °F) and 10–90% non-condensing humidity for optimal reliability.
What warranty coverage applies to the DES-85-MSU-III?
The DES-85-MSU-III is covered by D-Link’s limited lifetime warranty when purchased through authorized partners.
How do I update the firmware on the DES-85-MSU-III?
Download the latest firmware from D-Link’s support site and use the web GUI or TFTP method to install it.
Where can I find technical support and documentation for the DES-85-MSU-III?
Access manuals, release notes, and firmware updates on the D-Link support portal or contact your regional D-Link helpdesk.
What licensing options are required for advanced features on the DES-85-MSU-III?
Advanced routing, MPLS, and IPv6 features require a D-Link L3-Upgrade license installed on the DES-85-MSU-III.