Cisco ISR 4331 3GE Router | Enterprise WAN, Modular Branch — CON-L2NB3-ASR1XH11

Build branch networks around a router that can handle today’s connectivity requirements and adapt as the site evolves. The Cisco ISR 4331 pairs 3 Gigabit Ethernet ports with 2 Network Interface Module slots and 1 Service Module slot, giving teams a practical path for adding interfaces or services without replacing the core platform. Its 4 GB flash and 4 GB DRAM provide the local resources expected in an enterprise branch router. This configuration is designed for organizations that want predictable routing infrastructure with room for future change. Modular expansion matters when branch requirements JTFft, whether that means new uplinks, additional interfaces, or service integration. Instead of overbuying a larger chassis or settling for a fixed-port router, this platform gives you a measured path forward. For procurement and architecture teams, the value is in platform longevity and deployment consistency. Cisco ISR 4331 fits branch offices, remote sites, and distributed environments where uptime, manageability, and expansion options carry more weight than commodity hardware. It is a sensible choice when the network edge needs to stay stable while the business keeps moving. Ideal For Enterprise branch WAN edge routing Remote office connectivity with expansion needs Retail or satellite site network aggregation Standardized Cisco branch infrastructure Why This Product 1 Supports modular growth with 2 NIM slots and 1 SM slot 2 Delivers 3 Gigabit Ethernet ports for branch connectivity 3 Includes 4 GB flash and 4 GB DRAM for platform resources 4 Targets enterprise branch deployments over fixed-port alternatives