C891F-K9 - Cisco 800 Series Integrated Services Routers Overview
C891F-K9 - Cisco 800 Series Integrated Services Routers is a genuine edge and wide-area routing product from Cisco, a global name in networking whose platforms are used by enterprises, service providers and data-center operators alike. Belonging to the Cisco 800 Series family, the C891F-K9 unit is built to the original factory specification, so it integrates with existing Cisco deployments predictably and behaves exactly as the platform documentation describes. In the network, it is deployed as a standalone unit or as part of a larger managed network, following the standard operating procedures of the platform.
From a specification standpoint, it offers 1 ports for client, server or uplink connectivity. These are the original factory figures for this model, giving administrators a clear picture of what the unit can deliver before it enters service. Standard mounting, cabling and management practices apply, so deployment follows the same procedures as other Cisco hardware already running in the environment.
Typical deployments include branch and campus WAN connectivity, service-provider edge and MPLS deployments, and secure remote-site interconnect. Organizations commonly source it for refresh programs, capacity expansion and spares management, keeping a tested unit on hand so outages stay short and replacements are predictable. The factory detail for this unit reads: “CISCO C891F-K9 small business branch router, 1 SFP, 4 POE, security, wireless controller, AVC, WAN optimization, multimedia collaboration”. This makes it a practical choice when original-spec hardware is required at a predictable cost.
Every unit at LinkNewNet is inspected and tested before dispatch, and stock is graded, cleaned and verified for correct operation, including port status, console access and firmware state. Our warranty coverage and responsive technical support protect the purchase after it arrives, and our team can confirm revision levels and software compatibility before you order. For volume requirements we also offer configuration checks and staged delivery options.
Contact our sales team for current availability, lead time and shipping options for the C891F-K9. We respond quickly with stock status and a firm quote, so you can plan the refresh or expansion with confidence.
Key Specifications
Applications
Enterprise WAN
Branch and campus routing with advanced services.
Service Provider
Edge routing for ISP and MPLS deployments.
Data Center
Interconnect core and aggregation layers reliably.
Buying a Pre-Owned C891F-K9
Verify the unit is tested, firmware confirmed, and condition documented. Every unit is fully tested and warranty covered. Contact our team for current stock and availability.
C891F-K9 Specifications | |
WAN Interfaces | 1-port GE or 1‑port SFP 1-port FE |
LAN Interfaces | 8-port 10-/100-/1000-Mbps managed switch (4‑ports PoE capable with 125W power supply adapter) |
802.11a/g/n Option | Yes Cisco CleanAir technology |
Integrated USB 2.0/AUX/Console | Yes |
Integrated Dial Backup | V.92 analog modem ISDN BRI |
| IP and IP services | ● Routing Information Protocol Versions 1 and 2 (RIPv1 and RIPv2) ● Generic routing encapsulation (GRE) and multipoint GRE (MGRE) ● Cisco Express Forwarding ● Standard 802.1d Spanning Tree Protocol ● Layer 2 Tunneling Protocol (L2TP) ● Layer 2 Tunneling Protocol Version 3 (L2TPv3) ● Network Address Translation (NAT) ● Dynamic Host Configuration Protocol (DHCP) server, relay, and client ● Dynamic Domain Name System (DNS) ● DNS Proxy ● DNS Spoofing ● Access control lists (ACLs) ● IPv4 and IPv6 Multicast ● Open Shortest Path First (OSPF) ● Border Gateway Protocol (BGP) ● Performance Routing (PfR) ● Enhanced Interior Gateway Routing Protocol (EIGRP) ● Virtual Route Forwarding (VRF) Lite ● Next Hop Resolution Protocol (NHRP) ● Bidirectional Forwarding Detection (BFD) ● Web Cache Communication Protocol (WCCP) |
Switch features | ● Auto Media Device In/Media Device Cross Over (MDI-MDX) ● 25 802.1QVLANs ● MAC filtering ● Four-port 802.3af and Cisco compliant PoE ● Switched Port Analyzer (SPAN) ● Storm Control ● Smart ports ● Secure MAC address ● Internet Group Management Protocol Version 3 (IGMPv3) snooping ● 802.1x |
Security features | Secure connectivity: ● Secure Sockets Layer (SSL) VPN for secure remote access ● Hardware-accelerated DES, 3DES, AES 128, AES 192, and AES 256 ● Public-key-infrastructure (PKI) support ● Fifty IPsec tunnels ● Cisco Easy VPN Client and Server ● NAT transparency ● Dynamic Multipoint VPN (DMVPN) ● Tunnel-less Group Encrypted Transport VPN ● VRF-aware IPsec ● IPsec over IPv6 ● Adaptive control technology ● Session Initiation Protocol (SIP) application-layer gateway ● Cisco IOS Firewall: ◦ Zone-Based Policy Firewall ◦ VRF-aware stateful inspection routing firewall ◦ Stateful inspection transparent firewall ● Advanced application inspection and control ● Secure HTTP (HTTPS), FTP, and Telnet Authentication Proxy ● Dynamic and static port security ● Firewall stateful failover ● VRF-aware firewall ● Cisco ScanSafe Connector ● Cisco IOS Software black and white lists ● Integrated threat control: ◦ Intrusion Prevention System (IPS) ● Control Plane Policing ● Flexible Packet Matching ● Network foundation protection |
Number of recommended users | 50 |
| Standard 802.11 a/g/n access point | ● Optional on Cisco 890 Series models |
WLAN hardware | ● Support for Cisco CleanAir technology on Cisco 897 and 891F ● Automatic rate selection for 802.11a/g/n ● Noncaptive RPTNC omnidirectional dipole antennae; 2-dBi gain @ 2.4 GHz, 5-dBi gain @ 5 GHz ● 2 x 3 multiple input, multiple output (MIMO) radio operation ● Wi-Fi 802.11n Draft v2.0 certified |
Service Set Identifiers (SSIDs) and Multiple Broadcast SSIDs | ● 16 |
Wireless VLANs | ● 14 (encrypted and nonencrypted VLANs) |
Default and maximum flash memory | ● 256 on all Cisco 890 ISR models; not upgradable |
Separate console and auxiliary ports | ● RJ-45 |
Wireless specifications | ● 2.4 and 5 GHz |
Physical dimensions and weight | Weight: 5.5 lb (2.5 kg) maximum Product dimensions: ◦ H x W x D =1.82 x 12.71 x 9.78 in. (4.62 x 32.28 x 24.84 cm) (includes rubber feet) ◦ H x W x D = 1.75 x 12.71 x 9.78 in. (4.45 x 32.28 x 24.84 cm) (without rubber feet) |
External power supply | Product power specifications: ● AC input voltage: Universal 100 to 240 VAC ● Frequency: 50 to 60 Hz ● Maximum output power: 60W ● Output voltages: 12 VDC ● Optional PoE: ◦ Separate 80W PoE power supply for Cisco 891 and 892 ISRs ◦ Single 125W power supply required for Cisco 896, 897, 898, and 891F for router and PoE ◦ The Cisco 891-24X uses the internal power supply for PoE ● External output voltage: 48 VDC |
Environmental operating range | ● Nonoperating temperature: -4 to 149°F (-0 to 65°C) ● Nonoperating humidity: 5 to 95% relative humidity (noncondensing) ● Nonoperating altitude: 0 to 15,000 ft (0 to 4570m) ● Operating temperature: 32 to 104°F (0 to 40°C) ● Operating humidity: 10 to 85% relative humidity (noncondensing) ● Operating altitude: 0 to 10,000 ft (0 to 3000m) |
C891F-K9 - Deployment Notes
This C891F-K9 router serves branch, edge, or WAN-aggregation roles depending on the interface mix and forwarding capacity of the specific SKU. Verify the interface types (GE, 10GE, SFP, WAN), memory, and module slots that this variant provides against your deployment topology.
When planning a refresh, confirm the software feature set (base, advanced, security) applicable to this SKU and the licensed throughput. Our team can confirm software state and hardware revision before dispatch.
Each C891F-K9 unit is inspected, tested and verified before leaving our facility, including interface operation, console access, and firmware state. Contact us for volume pricing and staged delivery options.
C891F-K9 - Deployment Notes
This C891F-K9 router serves branch, edge, or WAN-aggregation roles depending on the interface mix and forwarding capacity of the specific SKU. Verify the interface types (GE, 10GE, SFP, WAN), memory, and module slots that this variant provides against your deployment topology.
When planning a refresh, confirm the software feature set (base, advanced, security) applicable to this SKU and the licensed throughput. Our team can confirm software state and hardware revision before dispatch.
Each C891F-K9 unit is inspected, tested and verified before leaving our facility, including interface operation, console access, and firmware state. Contact us for volume pricing and staged delivery options.
C891F-K9 - Cisco Series Notes
This listing is part of the Cisco enterprise networking product family, sourced and tested by LinkNewNet for enterprise deployment. Cisco router is positioned at the WAN edge, branch, or service-provider aggregation point. It provides routing, VPN, QoS and security services, and integrates with Cisco IOS-XE / IOS-XR management.
Deployment guidance: When planning this C891F-K9 unit into a network, confirm the software image (IOS/IOS-XE/NX-OS) required, the power and cooling profile, and the upstream/downstream interface types that match your existing infrastructure. For a like-for-like refresh, match the feature set of the units already in service so management and automation behave consistently.
Our Cisco reconditioning process: Every pre-owned Cisco unit at LinkNewNet passes a documented reconditioning flow before dispatch - visual inspection, internal cleaning, firmware verification, port-by-port testing, and configuration reset to factory defaults. This ensures the unit you receive operates reliably and integrates cleanly with your existing Cisco management tools.
Related models in this family: CISCO892-K9, CISCO891-K9, CISCO888-K9, CISCO876-K9, CISCO877W-G-J-K9. Compare specifications to confirm the right port density, feature set and uplink options for your deployment.
Model code: K9 = Cryptographic (encryption) software feature set - this suffix indicates the feature set, power, or regulatory variant of the C891F-K9, which affects software licensing and regional compliance.
