Cisco 921 Integrated Services Router (C921-4P)

The Cisco 921 Integrated Services Router (C921-4P) is a compact, fixed-configuration enterprise router designed to deliver secure and high-performance connectivity for small businesses, branch offices, and retail environments. As part of the Cisco 900 Series, it combines advanced security, Gigabit Ethernet routing, and integrated switching in a fanless, space-saving design. With support for VPN, firewall protection, and cloud-based management, the C921-4P is an ideal solution for reliable and secure network edge deployments.

Product Features

Integrated Gigabit Ethernet Connectivity

Includes 2 Gigabit Ethernet WAN ports for internet access with failover and load balancing, along with a 4-port managed Gigabit LAN switch for connecting local devices.

Advanced Security Protection

Provides enterprise-grade security with a stateful inspection firewall, Zone-Based Firewall, VPN support including IPsec, SSL, and FlexVPN, and deep packet inspection capabilities.

High Routing Performance

Delivers up to 1 Gbps routing throughput for unencrypted traffic, ensuring fast and reliable network performance for business applications.

Flexible Management Options

Supports web-based GUI, command line interface, SNMP, and cloud-based management through Cisco FindIT Network Manager for simplified deployment and monitoring.

Compact and Silent Design

Features a fanless desktop form factor for quiet operation, with optional rack-mount capability for flexible installation.

Comprehensive Networking Support

Supports IPv4 and IPv6 dual stack, advanced routing protocols such as OSPF and BGP, and Quality of Service features for traffic prioritization.

Built-In Traffic Visibility

Includes Flexible NetFlow and SNMPv3 for real-time traffic monitoring and network performance analysis.

Product Specifications

• Routing Throughput: Up to 1 Gbps (unencrypted traffic)
• Crypto Throughput: Up to 150 Mbps
• WAN Interfaces: 2 x 10/100/1000 Gigabit Ethernet (RJ-45)
• LAN Interfaces: 4-port managed Gigabit Ethernet switch (RJ-45)
• Memory (DRAM): 1 GB standard (varies by SKU)
• Flash Memory: 2 GB (non-upgradable)
• VPN Capacity: Supports up to 50 IPsec tunnels
• USB Ports: 1 x USB 2.0 Type-A
• Form Factor: Fanless desktop; rack-mountable with optional kit
• Dimensions (H x W x D): 1.70 x 9.0 x 9.5 inches (4.32 x 22.86 x 24.13 cm)
• Weight: 2.65 lbs (1.2 kg)
• Operating Temperature: 0°C to 50°C (32°F to 122°F)
• Power Supply: Internal AC (100 to 240 VAC, 50 to 60 Hz)
• Security Features: Stateful firewall, Zone-Based Firewall, VPN (IPsec, SSL, FlexVPN), NBAR2
• Routing Protocols: BGP, OSPF, EIGRP, RIP, VRF-Lite, GRE, mGRE
• IPv6 Support: Dual stack, DHCPv6, NAT64, OSPFv3
• Quality of Service: HQoS, LLQ, CBWFQ
• Traffic Monitoring: Flexible NetFlow, SNMPv3
• Management Options: Web GUI, CLI, Cisco FindIT Network Manager