Cisco Router Performance Comparison Chart - Choosing Your ISR Series

Tech Guides

Which ISR series is right for your network?

The ISR 4000 series routers represent a significant change in Cisco’s branch router architecture. With independent control and data planes, the ISR 4000 can provide consistent throughput numbers regardless of what features are in use.

Cisco Router Throughput Factors

However, total performance is most often controlled not by the router, but by the WAN circuit itself. For example, a small branch office with a cable Internet connection may only need 25 or 50Mbps of throughput. This small branch office will also have very little need of CPU-intensive features, such as internet-facing BGP or complex access control policies. Because of this limited need, routers from any of the three ISR generations can easily meet the needs of this site, so it’s important to perform a careful examination of the site requirements to make the best router selection.

If you’re ready to make a move now, get the details on our Cisco ISR routers or other new and used Cisco routers today!

Cisco Throughput Comparison Chart

Original ISR Series ISR G2 Series ISR 4000 Series
Cisco 1841 Throughput – 35Mbps Cisco 1941 Throughput – 153Mbps ISR 4321 – 50 – 100Mbps
Cisco 2801 Throughput – 45Mbps Cisco 2901 Throughput – 167Mbps ISR 4331 – 100 – 300Mbps
Cisco 2811 Throughput – 61Mbps Cisco 2911 Throughput – 180Mbps ISR 4351 – 200 – 400Mbps
Cisco 2821 Throughput – 80Mbps Cisco 2921 Throughput – 180Mbps ISR 4431 – 500 – 1000Mbps
Cisco 2851 Throughput – 112Mbps Cisco 2951 Throughput – 297Mbps ISR 4451 – 1 – 2Gbps
Cisco 3825 Throughput – 176Mbps Cisco 3925 Throughput – 426Mbps
Cisco 3845 Throughput – 256Mbps Cisco 3945 Throughput – 502Mbps
Cisco 3925E Throughput – 945Mbps
Cisco 3945E Throughput – 1.5Gbps

While the ISR G1 is nearing end of support and the ISR G2 is nearing end of sale, Curvature will continue to sell and maintain these product lines for as long as they remain relevant and useful.

Note: ISR 4400 throughput is governed by a license; the first number indicates the base throughput, while the second number indicates the license-upgraded throughput.  ISR G1 and G2 routers have no hard throughput limit.

Contact us to find out how we can help extend the life of your network.


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