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Port Configuration & Hardware Specifications
The router is equipped with 4 x 10/100/1000BASE-T LAN ports-of which 2 ports support PoE+ (IEEE 802.3at) delivering up to 30 W per port to power IP phones, wireless access points, and surveillance cameras directly from the router. For flexible WAN connectivity, the platform provides 2 x Gigabit Ethernet WAN ports (one dedicated RJ-45 and one combo RJ-45/SFP), supporting both copper and fiber uplinks for failover protection and load balancing. An integrated 802.11ac dual-band Wi-Fi 5 access point (2×2 MU-MIMO) with data rates up to 866.7 Mbps and support for up to 400 concurrent wireless clients enables converged wired/wireless access without an external controller. The platform features 4 GB DRAM and 4 GB flash memory.
Performance & Security
The C1121-4P delivers up to 370 Mbps IPsec VPN throughput, powered by an embedded IPsec hardware acceleration engine that maintains wire-speed encryption without degrading performance. A distributed multicore architecture with separate data and control planes allows the router to run concurrent voice, video, data, and security services simultaneously. Advanced security features include an integrated stateful inspection firewall, Application Visibility and Control, DMVPN and FlexVPN support, Encrypted Traffic Analytics for malware detection in encrypted flows, and Cisco Umbrella cloud security integration.
Management & Ideal Deployment
Management is streamlined through full CLI, SNMP, TR-069, and optional Cisco SD-WAN software for policy-based automation. The chassis measures 1.65 × 10.80 × 7.85 in (41.9 × 322 × 226 mm) and supports desktop or rack-mount placement. The C1121-4P series is ideal for SMB headquarters, retail stores, healthcare facilities, and remote office branches requiring a compact, low-noise edge router with integrated PoE+ switching, wireless LAN, and hardware-accelerated VPN security. The router can be factory-ordered with traditional Cisco IOS XE or Cisco IOS XE SD-WAN software images.
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