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48 × 25G Ports
48 × 25G SFP28 ports provide high-density aggregation of 25G access switches or 25G server connections — the ideal campus aggregation port speed for modern high-bandwidth deployments.
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48 ×25G
SFP28 ports
4 ×100G
QSFP28 uplinks
2.4 Tbps
Switching capacity
VSL
StackWise Virtual
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Download Official Datasheet
PDF · Official manufacturer document
CiscoSKU: C9500-48Y4C
Cisco Catalyst 9500 48-Port 25G + 4 × 100G Core Aggregation Switch (C9500-48Y4C)
48 × 25G + 4 × 100G — High-Speed Campus Core and Aggregation
The Cisco Catalyst 9500-48Y4C provides 48 × 25G SFP28 and 4 × 100G QSFP28 ports with 2.4 Tbps switching — delivering campus aggregation and core performance for high-density 25G access deployments.
- 48 × 25G SFP28 downlink/uplink ports
- 4 × 100G QSFP28 uplink ports
- 2.4 Tbps total switching capacity
- 1U fixed form factor — high-density aggregation
- StackWise Virtual — two-switch logical chassis (VSS equivalent)
- Cisco IOS-XE, DNA Center, SD-Access core/distribution
- MACsec IEEE 802.1AE on all ports
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Key Features
Everything you need in one device
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4 × 100G Uplinks
4 × 100G QSFP28 uplinks connect the 9500-48Y4C to campus core or data centre switching fabrics at 100G line rate.
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StackWise Virtual
StackWise Virtual allows two Catalyst 9500 switches to form a single logical chassis — providing VSS-equivalent active/active redundancy and simplified management.
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SD-Access Core
Serves as the SD-Access transit control plane node or borderin DNA Center SD-Access deployments — connecting campus fabric to data centre or WAN.
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MACsec All Ports
Hardware MACsec on all 48 × 25G and 4 × 100G ports ensures encrypted inter-switch links throughout the campus aggregation layer.
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IOS-XE Programmability
Full IOS-XE model-driven programmability with YANG, NETCONF, RESTCONF, gRPC — enabling Ansible, Terraform, and Cisco NSO automation.
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Trustworthy Systems
Cisco TAm hardware trust anchor, Secure Boot, and SUDI image integrity provide supply chain and runtime software integrity assurance.
About the Cisco Catalyst 9500-48Y4C
The Cisco Catalyst 9500-48Y4C is a 1U fixed-configuration switch delivering 48 × 25G SFP28 ports and 4 × 100G QSFP28 ports — making it the industry's premier campus aggregation switch for high-bandwidth 25G access layer deployments. With 2.4 Tbps of non-blocking switching capacity, it aggregates multiple Catalyst 9300 or 9400 access/distribution switches over 25G uplinks, and connects to the campus core or data centre over 100G.
StackWise Virtual allows two Catalyst 9500-48Y4C switches to be paired as a single logical chassis — providing active/active redundancy, simplified single-IP management, and cross-switch EtherChannel (LAG) for maximum resilience. This is Cisco's modern equivalent of the classic VSS (Virtual Switching System) technology, delivering dual-switch high availability without the complexity and cost of chassis-based solutions.
In Cisco DNA Center SD-Access deployments, the C9500-48Y4C serves as the SD-Access Border or Transit node — connecting the campus fabric (built on Catalyst 9300/9200 fabric edge nodes) to the data centre or WAN. This position in the architecture requires high throughput and 100G uplinks, both of which the 9500-48Y4C provides natively.
The C9500-48Y4C complements the Catalyst 9500-32C — while the 9500-32C focuses on 32 × 100G connectivity for data centre spine, the 9500-48Y4C provides higher port density at 25G for campus aggregation tiers where 100G per connection would be overprovisioned. Both models run the same IOS-XE software and integrate identically with DNA Center.
Technical Specifications
📄 Download Datasheet (PDF)Use Cases
Ideal for a wide range of deployments
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Campus Aggregation
Aggregates Catalyst 9300/9200 access stacks via 25G uplinks — connecting to campus core over 100G.
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SD-Access Border
DNA Center SD-Access border node connecting campus fabric to data centre and WAN at 100G.
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25G Access Aggregation
48 × 25G ports right-sized for aggregating 25G access switches in high-bandwidth campus environments.
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Catalyst 6500 Successor
Modern replacement for Catalyst 6500 aggregation with 25G/100G ports, programmable ASIC, and DNA Center.
FAQ
Frequently Asked Questions
Why Servnet
Why buy from Servnet?
Trusted UK IT reseller since 2003 — supplying businesses of all sizes with genuine, competitively priced technology.
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Authorised UK Reseller
Servnet is an authorised IT reseller with direct access to leading product lines at competitive pricing.
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Our engineers will help you select the right product and advise on compatibility with your existing infrastructure.
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Most products ship from UK stock. Express delivery available for urgent deployments.
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Genuine, Warranted Kit
All products are genuine, brand-new, with full manufacturer warranty and RMA support.
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Configuration Services
We can pre-configure your hardware before shipping — reducing on-site deployment time and cost.
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