The Cisco CISCO2951/K9 2951 Integrated Services Router (ISR G2) is an enterprise-class routing platform engineered to deliver secure, scalable, and high-performance networking for branch offices and distributed enterprise environments. As part of the Cisco 2900 Series Integrated Services Router Generation 2 (ISR G2) family, it combines advanced routing, security, voice, video, and application services into a single modular platform, helping organizations simplify network infrastructure while reducing operational costs.
Equipped with three Gigabit Ethernet interfaces, including two combo RJ-45/SFP ports, the Cisco 2951 provides flexible WAN and LAN connectivity for high-speed enterprise networks. Its modular architecture features four Enhanced High-Speed WAN Interface Card (EHWIC) slots, two Service Module (SM) slots, one Internal Services Module (ISM) slot, and three Packet Voice DSP Module (PVDM3) slots, allowing businesses to expand networking, voice, security, and application services as their requirements evolve.
Powered by Cisco IOS Software, the router supports a comprehensive range of enterprise networking technologies, including IPv4, IPv6, MPLS, BGP, OSPF, EIGRP, RIP, IS-IS, Cisco Express Forwarding (CEF), Quality of Service (QoS), and multicast routing. Integrated security capabilities such as IPsec VPN, SSL VPN, DMVPN, Cisco IOS Zone-Based Firewall, Cisco IOS Intrusion Prevention System (IPS), and hardware encryption acceleration help protect critical business data while enabling secure remote connectivity.
Designed for unified communications, the Cisco CISCO2951/K9 supports voice, video, and data services on a single platform, making it an ideal solution for organizations deploying Cisco Unified Communications and collaboration applications. Expandable memory and storage provide additional flexibility, allowing the router to adapt to growing business and application demands.
With support for up to 75 Mbps of services-enabled throughput, the Cisco 2951 ISR G2 delivers reliable application performance for enterprise branch offices, remote locations, and WAN edge deployments. Its 2U rack-mountable design and compatibility with optional redundant power solutions ensure dependable operation in business-critical environments.
Ideal for enterprise branch networking, secure WAN connectivity, unified communications, voice and video services, remote office deployments, and scalable network infrastructure expansion, the Cisco CISCO2951/K9 2951 Integrated Services Router offers the performance, modularity, security, and reliability required to support today's evolving enterprise networks.
Product Specifications - Cisco CISCO2951/K9 2900 Series Integrated Services Router (ISR G2)
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| Specification |
Details |
| Product Name |
Cisco CISCO2951/K9 2900 Series Integrated Services Router (ISR G2) |
| Manufacturer |
Cisco Systems |
| Part Number |
CISCO2951/K9 |
| Product Series |
Cisco 2900 Series Integrated Services Router Generation 2 (ISR G2) |
| Product Model |
Cisco 2951 ISR G2 |
| Product Type |
Integrated Services Router |
| Architecture |
Modular ISR G2 with Multi-Gigabit Fabric |
| Embedded Gigabit Ethernet Ports |
3 × 10/100/1000 Gigabit Ethernet |
| Port Configuration |
2 × Combo RJ-45/SFP Gigabit Ethernet + 1 × RJ-45 Gigabit Ethernet |
| Console Ports |
1 × RJ-45 Console, 1 × Mini-USB Console |
| Auxiliary Port |
1 × RJ-45 AUX |
| USB Ports |
2 × USB 2.0 |
| Expansion Slots |
4 × Enhanced High-Speed WAN Interface Card (EHWIC) Slots |
| Service Module Slots |
2 × Service Module (SM) Slots |
| Internal Services Module |
1 × ISM Slot |
| DSP Slots |
3 × Packet Voice DSP Module (PVDM3) Slots |
| Performance |
Up to 75 Mbps (Services Enabled) |
| Memory (DRAM) |
512 MB Standard, Expandable up to 2.5 GB |
| Flash Memory |
256 MB Compact Flash (Upgradeable) |
| Operating System |
Cisco IOS Software |
| VPN Support |
IPsec VPN, SSL VPN, DMVPN |
| Firewall |
Cisco IOS Zone-Based Firewall |
| Intrusion Prevention |
Cisco IOS IPS |
| Hardware Encryption |
Integrated Hardware Encryption Acceleration |
| Routing Protocols |
BGP, OSPF, EIGRP, RIP, IS-IS, Static Routing |
| IPv4 Support |
Yes |
| IPv6 Support |
Yes |
| MPLS Support |
Supported |
| Multicast Routing |
Supported |
| Cisco Express Forwarding (CEF) |
Supported |
| Quality of Service (QoS) |
Advanced QoS and Traffic Prioritization |
| Voice Support |
Cisco Unified Communications Ready |
| Video Support |
Supported |
| WAN Optimization |
Supported with Compatible Service Modules |
| High Availability |
Supported |
| Management |
CLI, SNMP, Cisco Prime Infrastructure, Cisco IOS Management Tools |
| Power Supply |
Internal AC Power Supply |
| Redundant Power |
Supported with External Redundant Power System (RPS) |
| SD-WAN Support |
Not Supported (Traditional WAN Architecture) |
| Form Factor |
2U Rack-Mountable |
| Rack Height |
2 Rack Units (2U) |
| Deployment Type |
Enterprise Branch, WAN Edge and Unified Communications |
| Application |
Enterprise Routing, Secure WAN, Voice, Video and Multi-Service Networking |
| Reliability |
Enterprise-Class |
| Region Variant |
Global |
| Condition |
Refurbished |
| Use Cases |
Enterprise Branch Networking, Secure WAN Connectivity, Unified Communications, Voice and Video Services, Remote Office Deployments, Network Infrastructure Expansion |
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FAQs
Q1. How many Gigabit Ethernet ports does the CISCO2951/K9 provide?
The router includes three integrated Gigabit Ethernet ports for LAN and WAN connectivity.
Q2. What expansion options are available on this router?
It supports four EHWIC slots, three DSP slots, and two Service Module (SM) slots for flexible network, voice, and application expansion.
Q3. Which operating system does the CISCO2951/K9 use?
The router runs Cisco IOS Software, providing advanced routing, security, and unified communications features.
Q4. Is the CISCO2951/K9 suitable for branch office deployments?
Yes. It is specifically designed for enterprise branch offices that require secure WAN access, voice services, and scalable network infrastructure.
Q5. What applications is the CISCO2951/K9 best suited for?
It is ideal for enterprise routing, VPN connectivity, unified communications, branch networking, and secure WAN deployments.
