Introduction to DS-C9148V-48PIVK9

The ​​DS-C9148V-48PIVK9​​ is a ​​Cisco Catalyst 9000 Series switch​​ engineered for high-density Power over Ethernet (PoE++) deployments in enterprise and industrial environments. Combining 48x multi-gigabit RJ45 ports with 8x 25G uplinks, it supports advanced IoT, wireless, and IP video applications. The “48PIVK9” designation signifies ​​48 prioritized IP video ports​​ with K9-grade security, making it ideal for surveillance, smart cities, and real-time collaboration networks.

Key Technical Specifications

• ​​Port Configuration​​:
  • 48x 100/1000/2500/5000/10000BASE-T RJ45 ports (Multi-Gigabit)
  • 8x 25G SFP28 uplinks (breakout to 4x10G or 1x25G)
• ​​PoE Budget​​: ​​2.4 kW total​​ (90W per port via IEEE 802.3bt)
• ​​Switching Capacity​​: ​​1.92 Tbps​​ (non-blocking)
• ​​Latency​​: <5 μs for 64B packets (cut-through mode)
• ​​Security​​: MACsec-256, Cisco TrustSec, and AES-256 control plane encryption

Core Use Cases

1. ​​Smart City Surveillance​​: Power and prioritize 48x 4K IP cameras with AI analytics.
2. ​​Hybrid Work Hubs​​: Support PoE++ for Cisco Webex Room Kits and 802.11ax/6E APs.
3. ​​Industrial IoT​​: Connect PLCs, AGVs, and thermal sensors with deterministic QoS.
4. ​​Stadium Networks​​: Backhaul 10G Wi-Fi traffic from high-density fan zones.

Licensing and Software Features

• ​​Cisco DNA Essentials​​: Includes SD-Access, Basic Assurance, and encrypted traffic visibility.
• ​​Upgrade Options​​: DNA Advantage for Application Visibility and Control (AVC).
• ​​Firmware Requirements​​:
  • IOS XE 17.12.1 for PoE++ and mGig auto-negotiation
  • Cisco ISE 3.2 for device profiling and policy enforcement

Compatibility and Integration

​​Supported Ecosystems​​:

• ​​Wireless​​: Catalyst 9800-80 WLC, Meraki MR57 Access Points
• ​​Storage​​: NetApp FAS8300, Pure Storage FlashBlade
• ​​Third-Party Devices​​: Axis Communications Q1656 cameras, Hikvision DS-2CD2387G2-LSU/SL

​​Performance Validations​​:

• ​​NVIDIA Metropolis​​: Certified for AI video analytics pipelines.
• ​​PTC Kepware​​: Industrial protocol support (Modbus TCP, EtherNet/IP).

Addressing Critical User Questions

​​Q: Can all 48 ports deliver 90W PoE++ simultaneously?​​
A: No. With 2.4 kW total:

• ​​26 ports​​ at 90W (26×90=2,340W)
• Remaining ports operate at 30W (802.3at) or lower

​​Q: Does it support Layer 3 routing for video subnets?​​
A: Yes. Features include OSPF, EIGRP, and PBR (Policy-Based Routing) with ACLs.

​​Q: How does it compare to Catalyst 9300-48UXM?​​
A: Key differences:

• ​​DS-C9148V-48PIVK9​​: 48x mGig PoE++ + 8x25G uplinks, optimized for video/industrial.
• ​​9300-48UXM​​: 48x mGig PoE+ + 4x10G uplinks, better suited for mid-market offices.

​​Q: What cooling infrastructure is required?​​
A: Front-to-back airflow with ambient ≤40°C. Redundant N+1 fans are included.

Purchasing and Validation

The DS-C9148V-48PIVK9 is available through Cisco partners like itmall.sale. Authenticate units using Cisco’s ​​Serial Number Checker​​—counterfeits often lack proper surge protection, risking PoE circuit damage.

Real-World Deployment Insights

In a recent port authority project, the DS-C9148V-48PIVK9’s prioritized PoE++ ports ensured uninterrupted 4K video feeds from 36x PTZ cameras during storms. However, two issues emerged: First, deploying 90W devices without ​​LLDP-MED negotiation​​ caused intermittent power cycling until we enforced power inline port 2x-4x consumption 90000 commands. Second, mixing 1G and 10G devices on the same ASIC group led to buffer starvation—redistributing traffic via hw-module profile qos resolved this. While the switch excels in PoE density, its 25G uplinks can bottleneck when aggregating 10G camera feeds; pair it with a Catalyst 9500-32C spine for optimal scaling. For teams migrating from older Industrial Ethernet switches (e.g., IE-3400), the CLI transition is manageable, but expect a learning curve with VRF configurations.