March 29, 2020
Cisco ISR 4000 series routers are very powerful and full-featured branch office routers as long as you don't exceed their throughput limits
Score 8 out of 10
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Likelihood to Recommend
We originally used Cisco ISR 4451 routers as head-end routers, but as bandwidth requirements and circuit, sizes increased we have outgrown their capabilities in that role. We are now using ISR 4000 series routers at branch locations to replace our ISR 2900 and 3900 series routers. They are extremely capable in this role, and it is nice moving towards all of our routers and switches running IOS-XE. For smaller head-end deployments. ISR 4000s may still be viable but their limitation is definitely their throughput limits.