Dell Connectrix DS-6620B
The Dell Connectrix DS-6620B is a high-density 1U Fibre Channel SAN switch built for enterprise private cloud storage networks and high-throughput all-flash data centers. Offering forty-eight 32Gb SFP28 ports and four QSFP28 Q-Flex ports that deliver an additional 16 ports via breakout, it scales from 24 to 64 ports on demand. Operating on Brocade Gen 6 ASIC silicon, it delivers sub-700ns latency and full hardware-assisted IOInsight telemetry for monitoring SAN latency anomalies. Buyers of pre-owned DS-6620B units should verify active port licenses and confirm matching power supply airflow direction.
Also written as: Connectrix DS-6620B, Dell DS-6620B, Brocade G620 Dell OEM, DS-6620B 32Gb FC Switch
Specifications
| Brand | Dell |
|---|---|
| Family | Connectrix |
| Form factor | 1U rack |
| Released | Oct 2017 |
| Ports | 64x 32Gb Fibre Channel ports (48x SFP28 ports + 4x QSFP28 Q-Flex ports supporting 4x 32Gb breakout each) |
| Switching capacity | 2.048 Tbps full-duplex aggregate throughput |
| Power supply | Dual redundant hot-plug power supplies with integrated fans |
Generations
- Next generation: Dell Connectrix DS-7720B
Works together
How the Dell Connectrix DS-6620B connects to servers, storage and the network: 1 way, with the parts and products on each path.
Fibre Channel SAN
Match the speed: 16Gb and 32Gb FC HBAs, switches and array ports work together, and each generation also runs one or two speeds below its own (a 32Gb port runs at 16Gb and 8Gb).
Servers
Dell PowerEdge R740 2U rack
Dell PowerEdge R750 2U rack
Dell PowerEdge R760 2U rack
Dell PowerEdge R440 1U rack
Dell PowerEdge R540 2U rack
Dell PowerEdge R640 1U rack
Adapters for the server
540-BCMT Dell QLogic 2772 Dual Port 32Gb Fibre Channel PCIe Adapter
540-BCMU Dell Emulex LPe35002 Dual Port 32Gb Fibre Channel PCIe Adapter
540-BDLM Dell Emulex LPe36002 Dual Port 64Gb Fibre Channel Host Bus Adapter
540-BBUU Dell Emulex LPe31002 Dual Port 16Gb Fibre Channel Host Bus Adapter
Storage
Dell Unity XT Unity 300 2U rack
Dell Unity XT Unity 400 2U rack
Dell Unity XT 380F 2U rack
Dell Unity XT 380XT 2U rack
Dell Unity XT 480F 2U rack
Dell Unity XT 480XT 2U rack
Optics
Plan and size it
- Draw this setup in the topology planner mrplanb.com
- Add up rack power and space rack-density.com
- Virtualization storage Ledger: scored storage platforms mrplanb.com
- SAN transport and NVMe over FC for backup mrplanb.com
- Dell E-Lab Navigator (Dell interoperability) dell.com
Check compatibility with Dell
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Dell has tested with the Dell Connectrix DS-6620B.
- Compatibility Dell E-Lab Navigator (storage and SAN interoperability) (free vendor sign-in)
- Support Dell Support: drivers, manuals and service tag lookup
Equivalent models from other brands
- Dell Connectrix Mds 9396T
- Lenovo ThinkSystem DB620S · compare
Buying a used DS-6620B: what to check
Verify port license counts (starts at 24 ports, scalable up to 64). Test both hot-plug power supply units, check optical ports under loopback, and verify FOS admin password access.
FAQ
What is the purpose of the Q-Flex ports on the DS-6620B?
The four QSFP28 Q-Flex ports can be utilized as 128Gb inter-switch links (ISLs) or broken out into 4x 32Gb Fibre Channel server/storage connections using optical breakout cables.
Does the DS-6620B support redundant power supplies?
Yes, it includes dual hot-plug load-sharing power supplies supporting non-disruptive replacement during operation.
Buying or selling DS-6620B?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Dell Connectrix DS-6620B Specification Sheet, checked 2026-10-27