ISR 4000
Choose a Cisco ISR 4000 Series router by the throughput your circuit needs and the modules you plan to fit: Cisco's ISR 4000 data sheet rates the 4300 models at 50 to 200 Mbps by default and the 4400 models at 500 Mbps to 1.5 Gbps, with a performance license raising each rate, and gives every 4300 and 4400 model two or three NIM slots. Each router is tested in-house, carries our 2-year warranty and ships by free ground delivery to the lower 48 states; name the bandwidth and modules your branch needs when you ask for a quote.
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Cisco ISR 4331 3-Port GbE Integrated Services RouterAvailability: Available by QuoteManufacturer: Cisco Condition: Refurbished 2 Year WarrantyRequest Pricing - Cisco ISR 4321 2-Port GbE Integrated Services RouterAvailability: Available by QuoteManufacturer: Cisco Condition: Refurbished 2 Year WarrantyRequest Pricing
- Cisco ISR 4431 4-Port GbE Integrated Services RouterAvailability: Available by QuoteManufacturer: Cisco Condition: Refurbished 2 Year WarrantyRequest Pricing
- Cisco ISR 4451-X 4-Port GbE Integrated Services RouterAvailability: Available by QuoteManufacturer: Cisco Condition: Refurbished 2 Year WarrantyRequest Pricing
- Cisco ISR 4351 3-Port GbE Integrated Services RouterAvailability: Available by QuoteManufacturer: Cisco Condition: Refurbished 2 Year WarrantyRequest Pricing
ISR 4200, 4300 and 4400 compared
The ISR 4000 family steps up in throughput, slot count and rack height from one series to the next. Cisco's ISR 4000 Family data sheet gives these ranges for each series:
| Series | Onboard GE ports | NIM slots | SM-X slots | Default throughput | With performance license | Rack height |
|---|---|---|---|---|---|---|
| ISR 4200 | 2 | 2 | 0 | 35 Mbps | 75 Mbps | 1RU |
| ISR 4300 | 2 or 3 | 2 or 3 | 0 to 2 | 50 to 200 Mbps | 100 to 400 Mbps | 1RU or 2RU |
| ISR 4400 | 4 | 3 | 0 to 3 | 500 Mbps to 1.5 Gbps | 1 to 3 Gbps | 1RU to 3RU |
Searching by model? See the ISR 4321, ISR 4331, ISR 4351 and ISR 4431.
Throughput and the performance license
An ISR 4000 forwards at its default rate until a throughput license raises it, so the license matters as much as the model, and a Boost license raises the CEF-only forwarding rate further. A throughput license is software, so it is confirmed for each unit rather than assumed from the model. Tell us the rate your circuit needs and we will confirm what the router we ship is licensed for before you order.
Module slots: NIM, SM-X and ISC
Slots decide which interface and service modules a branch router can grow into. Cisco gives the 4300 models two or three NIM slots and up to two SM-X slots and the 4400 models three NIM slots and up to three SM-X slots, and on a model with two SM-X slots one double-wide SM-X module can take the place of two single-wide ones. The 4300 and 4400 models also carry an onboard ISC slot. Tell us which modules you plan to install and we will confirm the fit on the quote.
Software images and bundles
Cisco ships the ISR 4000 with one IOS XE universal image, and from IOS XE 17.2.1 that image boots in two modes: Autonomous mode for routing and Controller mode for Catalyst SD-WAN. Cisco's data sheet describes a license in Autonomous mode as perpetual, while Controller-mode licenses are term-based and renew.
Cisco builds the Autonomous-mode software bundles on IP Base. SEC adds advanced security (zone-based firewall, IPsec VPN, EZVPN, DMVPN and FlexVPN), V adds unified communications (CME, SRST and CUBE), and AX adds security plus advanced networking protocols such as L2TPv3, BFD, MPLS, VRF and VXLAN, with application experience services including PfRv3, WAAS with AppNav, NBAR2, AVC and IP SLA; VSEC and AXV combine them. The sale does not include software licenses or subscriptions unless the listing states otherwise, and the written quote will say exactly what the router carries before you commit.
Power, rack height and memory
Power options split the lower and upper models. The smaller 4300 models take external or internal AC and PoE supplies, with DC versions on some, while the 4400 models offer internal AC, DC or PoE supplies with an internal redundant supply option. The 4400 models also split memory between a control and services plane and a separate data plane, where the 4300 models share one memory pool.
Buying a refurbished ISR 4000
Each router goes through our standard process: inbound testing on arrival, disassembly and cleaning, inventory, then configuration and a final test when it is picked for your order. Routers are backed by our 2-year warranty and go out by free FedEx Ground shipping to addresses in the lower 48 states; send the throughput, bundle and modules you need with the quote request. SFP optics for the routers' SFP ports are on the Optical Transceivers page, other Cisco routers are under Cisco Routers, and the wider range is in Cisco networking.
Cisco ISR 4000 Series questions
- Which ISR 4000 do I need?
- Start from the bandwidth and the modules. Cisco rates the ISR 4200 at 35 Mbps by default and 75 Mbps with a performance license, the 4300 series at 50 to 200 Mbps by default and up to 400 Mbps licensed, and the 4400 series at 500 Mbps to 1.5 Gbps and up to 3 Gbps licensed. The 4300 and 4400 models add SM-X slots for larger service modules, and the 4400 models offer a redundant supply.
- What does the performance license change?
- Throughput, without new hardware. It is a remote performance-on-demand license upgrade that raises router capacity two- to threefold by model, from 50 to 100 Mbps on the entry 4300 model and from 1.5 to 3 Gbps on the top 4400 model, and a separate Boost license lifts the CEF-only forwarding rate further. Licenses are software, so we confirm what each unit carries before you order.
