How to evaluate a used 100GbE switch supplier
- Exact SKU, not just port count. A quote should name the model and revision (for example SN3700-CS2FC), because port config, airflow and PSU loadout differ inside one family.
- Airflow direction. Power-to-connector and connector-to-power units are not interchangeable in a live rack; confirm the direction before ordering.
- Test scope. Ask what was actually checked: port link state, fan and PSU health, management interface access, and on what test setup.
- Optics and cabling plan. 100G transceivers and DACs are usually quoted separately; a supplier should confirm port compatibility against your list, not just sell the box.
- Included accessories. Rack rails, fan trays and power supplies are the usual small-print gaps in used switch purchases.
Used Mellanox 100GbE switches listed on zhongxindata.hk
The models listed on zhongxindata.hk are in stock; availability is confirmed per part number in your quote.
| Model | Key spec | Listing |
|---|---|---|
| Mellanox Spectrum SN2700-CS2FC | 32 x 100GbE QSFP28, 1U | Mellanox Spectrum SN2700-CS2FC |
| Mellanox Spectrum SN3700-CS2FC | 36 x 100GbE QSFP28, 1U | Mellanox Spectrum SN3700-CS2FC |
| Mellanox Spectrum SN3700-VS2FC | 36 x 100GbE QSFP28, 1U | Mellanox Spectrum SN3700-VS2FC |
| Mellanox Spectrum SN3800-CS2F | 64 x 100GbE QSFP28, 2U | Mellanox Spectrum SN3800-CS2F |
| Mellanox Spectrum SN4600-VS2F | 36 x 100GbE QSFP28, 1U managed | Mellanox Spectrum SN4600-VS2F |
What to check before you buy a used 100GbE switch
- Port breakout. QSFP28 ports can run 100G or break out to 4 x 25G; confirm the breakout mode and cable type your design needs.
- Switch software. Spectrum SN2000 and SN3000 series units run ONYX or Cumulus Linux; confirm the installed version matches what your automation expects.
- Power and cooling. 1U 100G switches are power dense; check PSU count, PSU rating and airflow direction against your rack.
- Layer 3 features. Confirm whether the unit is licensed and configured for the routing features your fabric needs; licensing state is stated per unit in the quote.
- Redundancy. Dual PSUs and redundant fan trays matter more in a spine role than in a lab; confirm both are present.
How ordering works
- Send the part number, quantity and your optics or cabling list on WhatsApp +86 13068616914.
- You receive a quote per part number, with the exact unit configuration stated.
- We confirm airflow direction, PSU and included accessories with you before the order is finalised.
- The switch is dispatched from Hong Kong, China with export documents included.
Frequently asked questions
How do I get a price for a switch?
All pricing is quoted per part number and quantity; there are no fixed prices on zhongxindata.hk. Send the model, port count and quantity on WhatsApp +86 13068616914 and you receive a quote for the exact unit.
What warranty comes with a used switch?
90-day warranty from delivery. The warranty covers the unit as configured and quoted; accessories and optics are covered as stated in the same quote.
Can you confirm my transceivers and DACs will work?
Yes. Send your transceiver and cable list with the switch model and we confirm port compatibility, including breakout modes, before you order.
Do you handle volume orders?
Yes. Pricing is quoted per quantity and each unit is tested individually, so multi-unit orders arrive as matched batches rather than a single graded lot.
Where do you ship from, and can you ship to my country?
Orders are dispatched from Hong Kong, China with export documents. Destination, shipping method and cost are confirmed in your quote.
What condition are the units in?
Every unit is sold as used, with condition stated per unit. Hardware passes through our in-house re-flash and testing before listing, and photos show the actual equipment.
Related catalog
Get a wholesale quote
Message our B2B team on WhatsApp +86 13068616914 with the part numbers and quantities you need. Quotes are issued per part number and are valid the day they are issued.