Cisco CON-L1NBD-C930048S Explained: Smart Net Total Care for Catalyst 9300

Aug 06 , 2026 8

Quick answer: CON-L1NBD-C930048S is a Cisco Smart Net Total Care (SNTC) contract part number covering a 48-port Catalyst 9300 switch. "CON" marks it as a Cisco support contract, "L1" is the service level, "NBD" means next-business-day hardware replacement, and "C930048S" identifies the covered device. The contract attaches to the switch's serial number — not to the reseller — so a genuine, non-EOL used Catalyst 9300 can be covered by SNTC, with TAC access, software updates, and hardware replacement included.

Users who search "con-l1nbd-c930048s" are usually doing one of two things: decoding a part number they found on an invoice or eBay listing, or checking whether a used Catalyst 9300 can be covered by a Smart Net contract. This guide answers both questions, explains what the SKU actually covers, and walks through the rules that apply when the switch is second-hand.

Decoding CON-L1NBD-C930048S

Cisco contract part numbers follow a consistent pattern. Once you can read the pieces, any CON-* SKU stops being cryptic:

Note that the device suffix in contract SKUs is Cisco's contract-side identifier, not always the exact model string. A CON-L1NBD-C930048S typically maps to the 48-port Catalyst 9300 family — which on the used market means the C9300-48T, C9300-48P, C9300-48U, or C9300-48UXM, depending on the exact unit's serial number. If your invoice shows a slightly different suffix (for example CON-SNT-C9300-48T), it is the same type of coverage under a different naming scheme — Cisco has used both CON-SNT-* and CON-L1NBD-* prefixes for Smart Net Total Care contracts over time.

What Smart Net Total Care Actually Covers

The contract covers the switch, identified by its serial number — not the person who bought it. That single fact is what makes SNTC workable on the used market. Standard SNTC (L1) includes:

What it does not cover: damage, theft, or units with altered serial numbers. Cisco requires the hardware to be genuine — a gray-market unit with a tampered SN will be refused coverage, which is one more reason to verify serial numbers before buying used.

Service Levels and Response Times

"L1" and "NBD" describe how fast replacement arrives. The most common options on Catalyst gear:

For a used Catalyst 9300 in an access layer, L1/NBD coverage is almost always the sensible level — a spare switch on the shelf costs less than the 4-hour premium, and NBD replacement covers the realistic risk.

SNTC on Used Catalyst 9300 Switches: The Rules

Buying a used 9300 does not automatically include support, and buying one does not exclude support either. Three rules decide whether a used unit can be covered:

1. The model must not be end-of-life. Cisco does not sell new support contracts for EOL products. The Catalyst 9300 series is fully supported, which is exactly why it is the safest used buy today — the same argument that makes a C9300 DNA Advantage license package meaningful on the used market.

2. The serial number must be genuine and unaltered. Verify the SN before you pay. A legitimate seller can show you the serial sticker photo and, if the unit was previously covered, the contract history.

3. The contract must be transferred or purchased against that SN. SNTC is tied to the serial number. If the previous owner had a contract, it can be transferred through a Smart Account transaction; if not, you can purchase a new contract for the unit from an authorized partner — including refurbishers who carry their own SNTC contracts on tested stock.

How to Verify a Contract on a Used Switch

Before closing a deal that includes "Smart Net coverage", verify it in Cisco's systems — don't take a screenshot as proof. The practical checks:

On our side, every used Catalyst we list — including the C9300-24U-A and C9300-48U-E — ships with a test report and serial documentation, so the coverage checks above take minutes instead of weeks.

What It Costs (Indicative)

SNTC pricing is list-price based and varies by device, region, and contract length. As a rough reference on the used market, annual SNTC for a 48-port Catalyst 9300 typically lands between 8% and 15% of the switch's list price — and a used unit's purchase price is low enough that the contract, not the hardware, often becomes the larger line item over three years. Prices are indicative; request a quote for the exact serial number and coverage level you need.

Buying Checklist: Used C9300 with SNTC

If SNTC coverage is part of your deal, confirm these before paying:

• Exact serial number of the unit, shown on a real photo of the device
• Model confirmed as 48-port Catalyst 9300 family (matching the C930048S contract suffix)
• Model not EOL (Catalyst 9300 currently fully supported)
• Contract level and dates in writing — NBD vs 4-hour, start and end dates
• Coverage verified in Cisco's systems (Smart Account / CSCC), not just on paper
• Transfer terms if the contract comes from the previous owner
• Total cost: hardware + contract + shipping + duties, compared to the same switch with no support

If you are weighing a 9300 with a DNA subscription against one without, the license and the support contract are separate decisions — the DNA Advantage tier on the Catalyst 9500 family works the same way: software subscription on top of hardware, independent of SNTC.

FAQ

Q: What does CON-L1NBD-C930048S stand for?

It is a Cisco Smart Net Total Care contract SKU: CON = contract, L1 = service level 1, NBD = next-business-day hardware replacement, C930048S = the covered device (a 48-port Catalyst 9300).

Q: Does CON-L1NBD-C930048S cover used switches?

The contract attaches to the serial number, so the unit's age or previous owner does not matter — only that the serial is genuine and the model is not EOL. Catalyst 9300 is fully supported, so used units qualify.

Q: What's the difference between SNTC and a warranty?

A warranty comes from the seller or manufacturer for a fixed period. SNTC is a Cisco service contract you own for the serial number, renew yearly, and can transfer — it includes TAC access and software updates, not just hardware replacement.

Q: Can I transfer an existing Smart Net contract to myself?

Yes, if the seller cooperates. The contract transfer is done through Cisco's processes (Smart Account transfer or the standard contract transfer form). Get it confirmed in writing before you pay, and verify the transfer completed in Cisco's systems after the deal.

Q: How do I check if a serial number has active coverage?

Log in to your Cisco Smart Account and check Service Contracts, or ask your account team to run the SN. If you're buying from a refurbisher, ask them to show the coverage check before payment.

Q: Is NBD replacement fast enough for production use?

For access-layer switches, yes — a cold spare on your shelf plus NBD gives you recovery within a business day. For core or aggregation roles, consider 24x7x4 coverage instead. The SKU level is always printed in the contract line item, so there is no ambiguity.