S4B21A#ABA — HPE Aruba CX 18x 1/10/25G SFP28 4x 40/100G QSFP28 Switch
MPN: S4B21A#ABA|By: HPE

In Stockships worldwide
- Condition:
- New — authorized channel
- Warranty:
- Full manufacturer warranty
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Product overview
Part number S4B21A#ABA identifies this HPE Aruba CX 18x 1/10/25G SFP28 4x 40/100G QSFP28 Switch. Licensed features and the software train a switch shipped with decide what it can actually do once it is racked. Tell us the feature set you are relying on and we will confirm it before you commit.
Quotes are itemised down to the accessories, so nothing that is needed to make the part work is left off and discovered later.
Featuring
- Port Configuration
- 18x 1/10/25G
- Manufacturer
- HPE
Physical characteristics
- Product Type
- Network Switches
- Expedited shipping options are available — rates confirmed with your quote.
- Purchase orders accepted from qualified institutions.
- Compatibility is validated against your server platform before dispatch. Send us the model and we will confirm support.
These are the 3 facts we can state about S4B21A#ABA without inferring anything. Compatibility beyond this is confirmed per platform, on request, before you order.
Where the HPE S4B21A#ABA is deployed
- Sourcing S4B21A#ABA against a build sheet that names it explicitly
- Adding a top-of-rack switch to an existing fabric
- Replacing a failed switch inside a maintenance window
Who this part is for
- Teams adding an access layer or a top-of-rack switch to a live fabric
- Network teams replacing a failed switch under change control
- Integrators quoting a switch with its optics and rail kit as one line
What you get ordering this from us
Ordered by part number
Quoted and supplied against S4B21A#ABA specifically, so what arrives is what your build sheet asks for.
Quoted with the optics and rails
The switch, the transceivers at both ends and the mounting hardware go on one bill of materials, so nothing blocks the install.
Answered by a human
A quote comes back with the reasoning attached, including the cases where we think you should buy something else.
Questions buyers ask about this part
- Is S4B21A#ABA genuine and is the warranty intact?
- Yes. Supplied new and unopened, so the manufacturer warranty and firmware update path stay supported. No grey-market stock and no refurbished units sold as new.
- Will S4B21A#ABA work in my server?
- Tell us what it is aggregating and what optics you already hold. We confirm the port mix, the uplink capacity and the airflow variant, and we will list the optics and rail kit you will also need.
- Do you accept purchase orders and quote at volume?
- Yes. Purchase orders are accepted from qualified organisations, net terms are available on approval, and tiered pricing applies at quantity. Tell us how many you need.
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Specifying a system, not just the part?
Multi-node training is bounded by the fabric between the nodes, so the switch is specified with the cluster rather than after it.
