Cisco SG300-28 vs CBS350-24T-4G
The Cisco Business CBS350-24T-4G is the modern successor to the end-of-life SG300-28, adding four true Gigabit SFP uplinks, layer 3 routing, and current firmware in place of the retired 300 Series. Both deliver 56 Gbps of switching, but the SG300 has reached end of service life and should be replaced.
Cisco Small Business SG300-28
Legacy 28-port Gigabit managed switch from the 300 Series, now end of life and end of service life.
- 24x 10/100/1000 RJ45 plus 2 combo SFP uplinks
- 56 Gbps switching capacity
- Layer 3 lite (static routing) managed switch
- End of life; reached end of service life November 2023
Cisco Business CBS350-24T-4G
Current 24-port Gigabit managed switch with four dedicated SFP uplinks and full layer 3 features.
- 24x 10/100/1000 RJ45 plus 4 dedicated GbE SFP uplinks
- 56 Gbps switching, 41.66 Mpps forwarding
- Static and dynamic layer 3 routing
- Cisco Business dashboard and mobile app management
Cisco Small Business SG300-28 vs Cisco Business CBS350-24T-4G: spec comparison
| Spec | Cisco Small Business SG300-28 | Cisco Business CBS350-24T-4G |
|---|---|---|
| Gigabit RJ45 ports | 24 (28-port model total) | 24 |
| SFP uplinks | 2 (combo) | 4 (dedicated GbE SFP) |
| Switching capacity | 56 Gbps | 56 Gbps |
| Forwarding rate | 41.7 Mpps | 41.66 Mpps |
| Layer 3 | Static routing (Layer 3 lite) | Static and dynamic routing |
| PoE | No (non-PoE model) | No (non-PoE model) |
| Management | Web UI / CLI | Web UI, CLI, Cisco Business dashboard and app |
| Warranty | Limited lifetime (support ended) | Limited lifetime hardware warranty |
| Lifecycle status | End of life / end of service life | Mature product (verify current availability) |
Choose Cisco Small Business SG300-28 if
There is no advantage to choosing the SG300-28 today. It is past end of service life, so it gets no firmware or security fixes and no hardware replacement.
Choose Cisco Business CBS350-24T-4G if
Choose the CBS350-24T-4G to refresh an aging 300 Series closet. You gain four real SFP uplinks instead of two combo ports, full layer 3 routing, and current security firmware managed through the Cisco Business dashboard.
Verdict
Replace the SG300-28 with the CBS350-24T-4G. Switching capacity is the same, but the CBS350 adds dedicated uplinks, dynamic routing, and a supported software stack, while the SG300 is past end of service life and no longer patched. Confirm current CBS350 availability with your reseller, as Cisco has begun retiring some CBS350 SKUs.
Frequently asked questions
What is the replacement for the Cisco SG300-28?
The Cisco Business CBS350-24T-4G is the closest modern equivalent, offering the same 24 Gigabit access ports with more SFP uplinks and current firmware.
Is the SG300-28 still supported by Cisco?
No. The SG300-28 reached end of life and its end of service life passed in November 2023, so it no longer receives software or hardware support.
What is the difference in uplinks between the SG300-28 and CBS350-24T-4G?
The SG300-28 offers two combo SFP uplinks shared with copper ports, while the CBS350-24T-4G provides four dedicated Gigabit SFP uplink ports.
Does the CBS350-24T-4G support layer 3 routing?
Yes. The CBS350 supports both static and dynamic layer 3 routing, going beyond the SG300's static-only layer 3 lite capability.
More Small Business comparisons
Specs are for planning and may change; Uniqcli confirms the current Cisco bill of materials and pricing on your quote. Cisco, Catalyst, Nexus, Meraki, and Firepower are trademarks of Cisco Systems, Inc.; Uniqcli LLC is an independent authorized Cisco partner.