Cisco C921-4P Gigabit Ethernet Security Router

Cisco C921-4P is a compact, enterprise-grade router designed for small branch offices, remote sites or managed service deployments. It offers gigabit WAN and LAN connectivity, advanced security features, and full routing functionality—combining performance, security and flexibility in a space-efficient form factor.

Product Features

Gigabit WAN & LAN Ports

Includes 2 × Gigabit Ethernet WAN ports and 4 × Gigabit Ethernet LAN ports (managed switch integrated)—enabling high-speed connectivity for both internet/ISP links and local device networks.

Strong Security & VPN Performance

Supports advanced security functions including zone-based firewalls, NAT, ACLs, IPsec tunnels (up to ~50 tunnels), SSL VPN, DMVPN and AES/3DES encryption, with maximum crypto throughput around 150 Mbps.

Full Routing & Service Capabilities

Runs on Cisco IOS and supports protocols such as OSPF, EIGRP, BGP, VRF-Lite, GRE/MGRE, NAT, IPv4 and IPv6—making it suitable for dynamic and scalable network setups.

Compact & Efficient Form Factor

Measuring about 1.70″ × 9.0″ × 9.5″ (≈ 4.32 cm × 22.86 cm × 24.13 cm) and featuring an internal AC power supply, this model fits space-constrained environments like small offices or branch wiring closets.

Management & Monitoring Tools

Includes a USB 2.0 port, console RJ-45 port, CLI support, web-interface tools, SNMP v1/v2/v3, Cisco Configuration Professional and remote provisioning capabilities.

Product Specifications

• WAN Interfaces: 2 × Gigabit Ethernet (GE) RJ-45 ports.
• LAN Interfaces: 4 × Gigabit Ethernet (GE) RJ-45 ports (integrated managed switch).
• USB Port: Integrated USB 2.0 Type A.
• Maximum Crypto (IPsec) Throughput (policed): ~150 Mbps.
• Default Memory: DRAM ~1 GB; Flash ~2 GB.
• Dimensions (H × W × D): ~1.70″ × 9.0″ × 9.5″ (4.32 × 22.86 × 24.13 cm) including rubber feet.
• Operating Temperature: Typically 0 °C to 40 °C.