Cisco ISR4321/K9 — Enterprise Branch Router with 10-Year Warranty
Save up to 80% over list price on this fully tested, refurbished Cisco 4321 Integrated Services Router. The ISR4321/K9 delivers secure, high-performance WAN routing for small to mid-size enterprise branch offices — with SD-WAN readiness, advanced security, and scalable throughput in a compact 1RU rack-mountable chassis.
Key Specifications
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Part Number: ISR4321/K9
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Throughput: 50 Mbps default, upgradable to 100 Mbps via performance license (FL-4320-PERF-K9)
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WAN/LAN Ports: 2x onboard Gigabit Ethernet (10/100/1000) — 2 RJ-45 + 1 SFP
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Expansion: 2 NIM slots, 1 ISC slot for modular flexibility (LTE, T1/E1, EtherSwitch)
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Memory: 4 GB Flash / 4 GB DDR3 DRAM (expandable to 16 GB Flash / 8 GB DRAM)
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Form Factor: 1RU rack-mountable or wall-mountable
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Software: Cisco IOS XE with support for SD-WAN, DMVPN, IPsec VPN, QoS, NAT, and Zone-Based Firewall
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Management: 1 RJ-45 console port, 1 auxiliary port, 1 USB 2.0 port
Why Buy from Reef Telecom?
- ✅ Industry-leading 10-year warranty on all refurbished equipment
- ✅ Free shipping on orders over $300
- ✅ Every unit professionally inspected, tested, and certified before shipment
- ✅ Trusted by IT professionals and enterprises nationwide
Ideal Use Cases
The Cisco 4321 ISR is the go-to router for enterprise branch offices, retail locations, and remote sites that require secure WAN connectivity, VPN termination, and converged services including voice (SRST/CUBE) and application-aware routing. Fully compatible with Cisco SD-WAN (Viptela) controller deployments and traditional IOS XE dynamic routing configurations.
