Cisco 2851 is a high-end model in the Cisco 2800 Series Integrated Services Routers (ISR G1), designed for midsize branch offices requiring advanced routing, security, voice, and modular WAN expansion.
It provides significantly higher performance and interface density compared to lower models like the 2811 and 2821, making it suitable for multi-service enterprise branch deployments (data, voice, VPN, and security services in one platform).
Key Features
- 2 × onboard Gigabit Ethernet ports
- 4 × HWIC slots for WAN interface expansion
- 1 × Network Module slot (NME/NME-XD) for additional services
- Voice support via PVDM DSP modules
- Embedded security features:
- IPsec VPN
- Stateful firewall (IOS-based)
- Intrusion Prevention (optional IOS features)
- Hardware encryption acceleration support
- Modular architecture for WAN, voice, and service expansion
- Designed for secure branch office aggregation and WAN edge routing
Technical Specifications
- Model: Cisco 2851 (CISCO2851/K9)
- Series: Cisco ISR 2800 Series (Generation 1)
- CPU: MIPS-based network processor architecture
- Memory:
- ~256–512 MB RAM typical (expandable depending on configuration)
- ~128 MB Flash (expandable)
- Interfaces:
- 2 × Gigabit Ethernet
- 4 × HWIC slots
- 1 × NME/NME-XD slot
- 2 × AIM slots (hardware acceleration modules)
- Form Factor: 2U rack-mountable chassis
- Throughput: Up to multi-hundred Mbps class (service-dependent)
- Operating System: Cisco IOS (legacy ISR G1 train)
90 DAY'S
