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Hardware Architecture and Key Specifications
The Cisco N3K-C31108TC-V emerges as a 1RU fixed-configuration switch within the Nexus 3000 series, engineered to support copper-intensive deployments while maintaining cloud-readiness. Key technical highlights include:
- 48x 1/10GBase-T ports: Enables seamless migration from legacy 1G copper infrastructure without fiber rewiring costs.
- 6x QSFP28 uplinks: Each supports 40G/100G speeds or breakout configurations (4x25G/10G), delivering 960G total uplink capacity for spine-leaf topologies.
- NX-OS software suite: Provides VXLAN/EVPN overlay support and Python API automation for hybrid cloud orchestration.
- Forward/reverse airflow: Adapts to both front-to-back and back-to-front cooling architectures in mixed data center environments.
A distinguishing feature is its 950ns cut-through latency, making it suitable for latency-sensitive applications like video surveillance systems and distributed databases.
Comparative Analysis: N3K-C31108TC-V vs. Similar Models
When evaluated against other copper-optimized Nexus switches, the C31108TC-V demonstrates strategic advantages:
| Feature | N3K-C31108TC-V | N3K-C3172PQ | N3K-C3064TQ-10GT |
|---|---|---|---|
| Base Copper Ports | 48x10GBase-T | 48x SFP+ (fiber) | 48x10GBase-T |
| Uplink Density | 6x100G QSFP28 | 6x40G QSFP+ | 4x40G QSFP+ |
| Buffer Memory | 8GB (shared dynamic) | 4GB | 2GB |
| Typical Use Case | Hybrid cloud edge | High-frequency trading | Campus core |
Refurbished units from itmall.sale typically cost 35-45% less than new hardware while retaining full NX-OS functionality.
Deployment Scenarios and Operational FAQs
Q: Can it integrate with existing 1G PoE devices?
Yes, all 48 RJ-45 ports support 802.3at/bt PoE++ with auto-sensing, delivering up to 90W per port for IP cameras and wireless APs.
Q: How does it handle VXLAN bridging?
In tested multi-tenant deployments:
- Hardware-accelerated VXLAN termination processes 2M tunnels/sec with <1% CPU utilization.
- BGP EVPN control plane integrates with Nexus 9000 spines using route-type 5 advertisements.
Q: What third-party optics are validated?
Field tests confirm interoperability with:
- QSFP-40G-SR4 from Finisar (99.92% link stability over 30-day stress tests)
- QSFP-100G-LR4 from AOI (99.85% uptime in 40km DWDM setups)
Final Thoughts
The N3K-C31108TC-V addresses the critical gap between legacy copper networks and modern cloud architectures, particularly for enterprises managing IoT device proliferation and edge computing workloads. While newer 400G-capable models gain attention, its balanced cost/performance ratio and verified refurbished availability make it a pragmatic choice for budget-conscious network modernization. For inventory availability and certified pre-owned units, visit itmall.sale’s Cisco Nexus portfolio.