Cisco ISR 4431 4GE 8G Flash 4G DRAM IPB | Enterprise Router, WAN — CON-L1NBD-IE40104S

Keep critical branch services online with the Cisco ISR 4431, built for organizations that need more than basic routing. With 4 Gigabit Ethernet ports, 3 network interface module slots, 8 GB flash, and 4 GB DRAM, this platform is designed to handle routing, security, and service integration at the edge without forcing a redesign later. The ISR 4431 fits environments where branch traffic, voice, and application access must stay predictable under load. Its modular design gives infrastructure teams room to adapt connectivity as requirements change, while the onboard memory and flash support the software footprint expected in enterprise WAN deployments. That makes it a stronger fit than entry-level routers when the cost of downtime, truck rolls, or limited expansion is higher than the hardware delta. For teams standardizing Cisco branch infrastructure, this model offers a practical balance of performance and flexibility. It is suited to remote offices, distributed enterprises, and managed network environments that need a router capable of supporting business-critical connectivity with room to grow. Ideal For Primary WAN edge router for a regional branch office Connectivity hub for distributed enterprise sites Modular routing platform for managed network deployments Branch infrastructure standardization across Cisco environments Why This Product 1 More expansion headroom than fixed-port branch routers 2 Modular NIM support for changing site requirements 3 Higher-capacity memory profile for enterprise edge workloads 4 Better fit for standardized Cisco WAN deployments