The Cisco 921 Gigabit Ethernet Security Router (C921-4P) is a compact, enterprise-grade wired VPN router built for small businesses, branch offices, home labs, and managed service providers. Featuring dual Gigabit WAN interfaces and a 4-port managed Gigabit LAN switch, it delivers secure, high-performance connectivity with flexible deployment options.
Powered by Cisco IOS, the C921-4P supports advanced firewall protection, IPsec VPN, VLANs, NAT, QoS, and IPv6. The integrated USB 2.0 port allows LTE/3G dongle failover or local file storage. Designed for VoIP, cameras, and business-critical data, this router provides reliable performance in a fanless, silent desktop form factor. This unit is in Like New condition — fully tested and verified to Cisco standards.
Key Features & Benefits
- Dual Gigabit WAN Ports: Supports DHCP, Static IP, and PPPoE for multi-ISP or backup failover
- Integrated 4-Port Managed Gigabit Switch: VLAN-ready LAN for segmentation and inter-VLAN routing
- USB 2.0 Port: Add 3G/4G LTE failover, USB storage, or console connection flexibility
- Hardware-Accelerated IPsec VPN: Secure site-to-site and remote user connectivity
- Enterprise Firewall: Stateful inspection, ACLs, and zone-based policy control
- Advanced QoS: Prioritize voice, UC, and streaming video traffic
- IPv4 / IPv6 Dual Stack: Future-proof routing and security compatibility
- Silent, Fanless Design: Ideal for offices, retail, classrooms, and branch networks
- Flexible Management: Web UI, CLI (SSH/Console), SNMP, and Syslog for centralized monitoring
- Business-Ready Deployment: Perfect as a branch router, VPN gateway, or SMB firewall
Specifications
- Brand: Cisco
- Series: Cisco 900 Series Integrated Services Router (ISR)
- Model: 921
- Part Number: C921-4P / C921-4P-K9
- WAN Interfaces: 2× RJ-45 Gigabit Ethernet (WAN)
- LAN Interfaces: 4× RJ-45 Gigabit Ethernet (Managed Switch)
- USB Port: 1× USB 2.0 (Type A)
- Security: Stateful firewall, IPsec VPN, ACLs, NAT/PAT, zone-based policies
- Routing: Static, RIP, OSPF; Dual-stack IPv4/IPv6
- LAN Features: 802.1Q VLANs, DHCP server, inter-VLAN routing
- QoS: Traffic shaping and prioritization for voice / video
- Management: Web UI, CLI (SSH/Console), SNMP, Syslog
- Form Factor: Desktop, fanless, low noise
- Condition: Like New – Tested & Fully Functional
Frequently Asked Questions
- How many WAN ports does it have?
The Cisco C921-4P includes two Gigabit WAN ports for dual-ISP or failover setups. - Does it support VPN?
Yes, it features hardware-accelerated IPsec VPN for secure site-to-site and remote access connections. - What is the USB port used for?
The built-in USB 2.0 port supports 3G/4G LTE modems or local file storage. - Are the LAN ports managed?
Yes. The integrated 4-port Gigabit switch supports VLANs, DHCP, and QoS. - Does it provide PoE?
No, the LAN ports are Gigabit Ethernet only (non-PoE). - How is it managed?
Via the web interface, CLI (SSH/Console), or through SNMP/Syslog for remote monitoring. - Can I add Wi-Fi?
Yes. Connect a Cisco or third-party access point to a LAN port to add wireless coverage.