Cisco Catalyst 9500 DNA Advantage: C9500-DNAX-A-24YR License Explained

Aug 06 , 2026 9

Quick answer: The C9500-DNAX-A-24YR is a Cisco DNA Advantage license package for 24-port Catalyst 9500 switches. "DNAX" marks the DNA Advantage tier (vs DNA Essentials on plain "DNA" SKUs), "A" identifies the Advantage-tier configuration, "24" binds the license to 24-port Catalyst 9500 hardware such as the C9500-24Q-A or C9500-24Y4C-A (see the C9500-24Y4C-CX vs C9500-24Y4C-A comparison for regional variants), and "YR" identifies the annual subscription/renewal format. On a used unit, the perpetual license part stays with the hardware; the subscription part needs a formal Smart Account transfer.

The C9500-DNAX-A-24YR is one of the most searched Catalyst 9500 part numbers because it appears on purchase orders, asset lists and second-hand listings without any explanation of what it actually covers. This guide decodes the SKU, explains which hardware it binds to, and tells used-market buyers exactly what transfers — and what doesn't — when they buy a Catalyst 9500 with DNA Advantage.

Decoding C9500-DNAX-A-24YR

Like every Catalyst 9500 DNA SKU, the part number is built from fixed segments. Read it left to right:

In plain terms: C9500-DNAX-A-24YR = DNA Advantage entitlement for a 24-port Catalyst 9500, ordered with the annual renewal format. If a listing shows this SKU next to a C9500-24Q-A or C9500-24Y4C-A, the pairing is correct.

Which Catalyst 9500 Models Does It Bind To?

The "24" segment ties the license to 24-port 9500 hardware. The models you will most often see paired with this SKU on the used market:

If you are buying used, always confirm the license's port count matches the physical unit — a "24" DNA SKU on a 48-port chassis is a mismatch that will bite you later.

What DNA Advantage Adds on the Catalyst 9500

For core-switch duty, the Advantage tier is the meaningful one: SD-Access and TrustSec are the features that justify buying a Catalyst 9500 over simpler platforms, and they require the DNAX tier.

Used-Market License Rules: What Transfers, What Doesn't

• Perpetual DNA licenses stay with the hardware — an embedded DNA Advantage entitlement on a used C9500 remains active on the unit after sale.
• Subscriptions do not automatically transfer — the remaining term of a YR/annual subscription belongs to the seller's Cisco Smart Account unless formally transferred. Get the transfer confirmed in writing.
• Base IOS-XE always works — without any DNA subscription, a Catalyst 9500 runs IOS-XE with full switching; DNA features stay locked or run in 90-day evaluation mode.
• Support contracts are personal — any attached Smart Net contracts do not transfer with a used sale unless Cisco formally reassigns them.

Ask any seller for the show license summary output of the exact serial number before paying. A listing that cannot produce it is a listing you should skip.

How Does the C9500 DNA Family Differ From the C9300 DNA Family?

The tier logic is identical (X = Advantage, no X = Essentials, 24/48 = port binding), which is why the Catalyst 9300 DNA guide is a useful companion read. The practical differences: the 9500 runs in core/aggregation roles (so SD-Access and advanced routing matter more), its SKU list uses the A/E config markers and YR-style renewal formats, and used 9500 units are rarer — which is why a clean, license-verified unit holds its value well.

Indicative Used-Market Values

• C9500-24Q-A without DNA: roughly $3,500 – $5,500
• C9500-24Y4C-A with DNA Essentials: roughly $4,000 – $6,000
• C9500-24Y4C-A with DNA Advantage (perpetual): typically 10–20% above Essentials units

Indicative ranges for planning only — current quotes depend on condition, license state and stock. Request a quote for our in-stock C9500-24Y4C-A units or send us your part-number shortlist.

Buying Checklist

1. Confirm the hardware model matches the DNA SKU's port count (24 vs 48)
2. Get show license summary: tier (Advantage vs Essentials), perpetual vs term, remaining term
3. If term-based, confirm the Smart Account transfer in writing
4. Verify IOS-XE version supports the licensed features (17.x recommended)
5. Check EOL status — Catalyst 9500 remains in active support as of 2026
6. Ask for the test report: boot, all ports, uplink optics, firmware

Compare real units: browse our C9500-24Q-A and C9500-24Y4C-A listings, or read the C9500-24Y4C-A vs C9500-48Y4C-A comparison to size your deployment first.

FAQ

Q: What is the C9500-DNAX-A-24YR?

A: It is a Cisco DNA Advantage license package for 24-port Catalyst 9500 switches. DNAX marks the Advantage tier, 24 binds it to 24-port 9500 hardware, and YR identifies the annual subscription/renewal format. It is commonly paired with C9500-24Q-A or C9500-24Y4C-A hardware.

Q: Which Catalyst 9500 models does C9500-DNAX-A-24YR work with?

A: Any 24-port Catalyst 9500 — most commonly the C9500-24Q-A (40G/100G), C9500-24Y4C-A (25G/100G) and C9500-24X-A (10G). The 24 in the SKU binds the license to 24-port hardware, so it does not cover 48-port models.

Q: What is the difference between DNA Advantage and DNA Essentials on the 9500?

A: DNA Advantage (DNAX) unlocks SD-Access, TrustSec/Group-Based Policy, Encrypted Traffic Analytics and advanced routing/QoS. DNA Essentials covers basic DNA Center management. Advantage is the tier that matters for core-switch duty.

Q: Does the license transfer when I buy a used Catalyst 9500?

A: Perpetual license entitlements stay with the hardware. Annual/subscription entitlements (the YR format) are tied to the seller's Smart Account and require a formal transfer. Support contracts do not transfer automatically.

Q: What does YR mean in the SKU?

A: It identifies the annual subscription/renewal format of the DNA package. The perpetual license coverage lives in the same SKU family; the renewal aspect affects the subscription term, not the hardware entitlement.

Q: Can a used Catalyst 9500 work without a DNA subscription?

A: Yes — the switch runs IOS-XE and functions fully. DNA features either stay locked or run in evaluation mode (typically 90 days). A used unit with an embedded Advantage license is the better value than adding DNA later at list price.

Q: How is C9500-DNAX-A-24YR different from C9300 DNA SKUs?

A: The tier logic is the same (X = Advantage, no X = Essentials, port-count binding), but the 9500 uses A/E config markers and YR renewal formats, and the platform runs in core/aggregation roles where SD-Access and advanced routing matter more.

Q: Where can I buy a used Catalyst 9500 with DNA Advantage?

A: LinkNewNet stocks used Catalyst 9500 switches with documented license states, test reports and warranty. Send your part-number shortlist for a quote on the exact unit.