Cisco Switches & Routers

Cisco Catalyst Switches

Catalyst switches are Cisco's campus and access layer platform:

• Catalyst 9200/9300 — Current-generation access switches with UADP ASICs, SD-Access support, and DNA licensing. 1GbE and multi-gigabit (mGig) access ports with 10GbE/25GbE uplinks.
• Catalyst 3850 — Previous-generation access switch with UADP and stackable architecture. Widely deployed and well-supported.
• Catalyst 2960-X/XR — Entry-level managed access switches. 1GbE access with GbE or 10GbE uplinks. Layer 2 with basic Layer 3 routing on XR models.
• Catalyst 3750-X — Stackable Layer 3 switch for enterprise access. End of sale but still widely deployed in production.

Cisco Nexus Data Center Switches

Nexus switches are built for the data center fabric:

• Nexus 9000 — Spine and leaf architecture for modern data centers. Supports Cisco ACI or standalone NX-OS mode. 10/25/40/100GbE.
• Nexus 7000 — Modular chassis switch for large data center cores. High port density with redundant supervisors.
• Nexus 5000 — Top-of-rack data center switch with unified fabric (Ethernet + Fibre Channel over Ethernet).

Cisco ISR Routers

Integrated Services Routers for WAN connectivity and branch office:

• ISR 4000 Series (4221, 4331, 4351, 4431, 4451) — Current-generation with modular services. SD-WAN capable.
• ISR 2900 Series (2901, 2911, 2921, 2951) — Previous-generation with PoE, voice, and VPN modules.
• ISR 1900 Series — Entry-level branch router.

Cisco ASA Firewalls

Adaptive Security Appliance for perimeter and VPN:

• ASA 5500-X Series (5506, 5508, 5516, 5525, 5545, 5555) — Stateful firewall with optional Firepower IPS. VPN concentrator capability.

Why Buy Refurbished Cisco from Enterasource

Cisco equipment maintains long support lifecycles. Refurbished Catalyst, Nexus, ISR, and ASA devices deliver the same functionality as new at a lower cost, with Enterasource testing and warranty backing every device.

Frequently Asked Questions

What Cisco switches does Enterasource carry?

Enterasource stocks Cisco Catalyst campus switches (9200, 9300, 3850, 2960-X/XR, 3750-X) and Nexus data center switches (9000, 7000, 5000). Catalyst switches handle access and distribution layers with 1GbE to 25GbE ports. Nexus switches support spine-leaf data center fabrics at 10/25/40/100GbE. All switches are fully tested with current firmware before shipping.

Do refurbished Cisco devices support SmartNet or DNA licensing?

Refurbished Cisco devices are eligible for Cisco SmartNet support contracts, which can be purchased separately through Cisco or an authorized partner. DNA licensing (required for Catalyst 9000-series advanced features like SD-Access) can be transferred or purchased new. Contact Enterasource for current licensing guidance on specific models.

What is the difference between Cisco Catalyst and Nexus switches?

Catalyst switches run IOS-XE and are designed for campus networks — access layers, distribution, and wired/wireless convergence. Nexus switches run NX-OS and are designed for data center fabrics — spine-leaf topologies, high-bandwidth east-west traffic, and optionally Cisco ACI (Application Centric Infrastructure). Choose Catalyst for campus and branch deployments. Choose Nexus for data center core, leaf, and spine roles.

Can I mix Cisco and non-Cisco switches in the same network?

Yes. Cisco switches support standard protocols (802.1Q VLANs, OSPF, BGP, LACP, LLDP) and interoperate with other vendors. Proprietary features like VTP, PVST+, and Cisco ACI require all-Cisco environments to function. For multi-vendor networks, use standard protocols and avoid vendor-specific spanning-tree or management features.

Looking for other networking brands? Browse Juniper Networks, Dell Networking, or Palo Alto Networks firewalls. Need servers to go with your network? Browse refurbished enterprise servers.