The Cisco 4000 series integrated services routers (ISR) include a revolutionary converged branch platform with industry-leading network, compute, and WAN services. These routers can seamlessly extend cloud services across remote sites, and help you accelerate the digitization of your business. Use the 4000 series to effectively transition to a hybrid WAN architecture. Cisco 4000 series ISRs introduce chassis, modules, and WAN services with a robust management framework and validated designs for
| Product Type | Cisco ISR 4351 Integrated Services Router |
| Performance | 200 Mbps base, up to 400 Mbps with Performance-on-Demand |
| Integrated Interfaces | 3x 10/100/1000 (2x RJ45 + 1x 1G SFP), 1x RJ45 management |
| Expansion | 3 NIM slots, 1 SM-X slot, PVDM4 DSP support |
| Included Licenses | VSEC bundle (Voice + Security), K9 strong crypto |
| SD-WAN Capability | Cisco IOS XE; Cisco SD-WAN (Viptela) ready |
| Memory/Storage | 8 GB DRAM (default), 8 GB flash; field-upgradable |
| Routing Features | Dual-stack IPv4/IPv6, BGP, OSPF, EIGRP, MPLS, NAT/PAT, QoS |
| Security Services | Zone-based firewall, IPS, AMP, URL filtering (with licenses) |
| VPN | IPsec, DMVPN, FlexVPN, GETVPN, SSL VPN; AES-256/3DES hardware crypto |
| Voice/UC | SRST, CUBE, PVDM4 DSPs; PRI/BRI via NIMs; SIP/SCCP support |
| Management | CLI, WebUI, NETCONF/YANG, RESTCONF, SNMPv3, NetFlow |
| Interfaces (I/O) | USB 2.0 host, mini-USB console, RJ45 console, AUX |
| Power | Internal AC 100–240V, 50/60 Hz; typical 75 W (module dependent) |
| Form Factor | 1RU rack-mount; enterprise-grade cooling and acoustics |
| Software | Cisco IOS XE with app-hosting (IOx), IWAN/SD-WAN, virtualization support |
Yes, the Cisco ISR4351-VSEC/K9 Router is currently in stock and available for immediate shipment from our Boulder, CO warehouse. Same-day shipping on orders placed before 2pm MT.
This ISR4351-VSEC/K9 is professionally refurbished or new-surplus enterprise hardware. Every unit is fully tested, factory-reset, and inspected before shipping. Cosmetic blemishes (rack marks, minor scuffs) may be present but never affect functionality.
The ISR4351-VSEC/K9 comes with the Eldo Systems Lifetime Warranty covering hardware defects. We are an independent reseller — manufacturer warranties do not apply, but our lifetime coverage matches or exceeds typical OEM terms.
Free ground shipping on every order, included in the price. Orders ship same-day if placed before 2pm MT (Mon–Fri). Expedited overnight and 2-day options are available at checkout for urgent deployments.
Yes — we ship worldwide. International orders are quoted individually so we can present accurate freight, duties, and lead time. Use the Request a Quote form or call (484) 630-1533 to start.
Absolutely. We offer volume discounts and project pricing for resellers, integrators, and end-users buying in quantity. Submit a quote with your target quantity and our team will respond within 15 minutes during business hours.
Get the ISR4351-VSEC/K9 from Eldo Systems with lifetime warranty and free ground shipping.
Independent Reseller Notice: Eldo Systems is an independent reseller of refurbished and new-surplus enterprise networking equipment. We are not affiliated with, authorized by, or endorsed by Cisco, Juniper, Arista, HPE, Dell, Meraki, Fortinet, Mellanox, NVIDIA, Finisar, or any other manufacturer listed on this site. All product names, logos, and brands are property of their respective owners. All products sold are refurbished or new-surplus unless otherwise noted. Manufacturer warranties do not apply; all items are covered by the Eldo Systems Lifetime Warranty.
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