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CISCO891-K9
Cisco 891 GigaE SecRouter
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CISCO891-K9 is a compact integrated services router designed to deliver high performance and reliable connectivity for small business and enterprise branch deployments. Built on a fixed architecture, this router features dual power options via an AC power supply, integrated WAN and LAN interfaces with modular expandability, and comprehensive VPN capabilities ensuring secure remote access and data integrity.
CISCO891-K9 offers a rich set of integrated services including voice and video support, built‐in firewall and intrusion prevention features, and high availability with redundant power options. Its array of interfaces—featuring Fast Ethernet RJ-45 ports and an optional EHWIC expansion slot—ensures flexible connectivity that meets diverse deployment use cases, ranging from branch office connectivity to retail and industrial applications.
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| CISCO891-K9 |  CISCO871-K9 |  CISCO881G-S-K9 |  CISCO888GW-GN-A-K9 |  CISCO881W-GN-P-K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | N/A | N/A | N/A | N/A | DSL / Ethernet |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall, Intrusion Prevention | Firewall, Intrusion Prevention, Malware Protection | Firewall, Intrusion Prevention |
| Compliance Standards | FCC, CE | FCC / CE | FCC, CE | FCC, CE | IEEE802.11b/g, FCC, CE |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired / Wireless / Ethernet |
| Depth | 9.06 inches | N/A | 7.48 inches | N/A | N/A |
| Device Type | Router | Router | Router | Gateway | Router |
| EMC | N/A | N/A | N/A | N/A | N/A |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100/1000 | 10/100 |
| Expansion Slots | EHWIC | N/A | N/A | EHWIC, SFP+ | EHWIC |
| Features | VPN / IPv6 Compatible / Firewall | VPN / Firewall / IPv6 Compatible / VoIP | VPN, Voice, Security, Firewall, IPv6 Compatible | VPN, VLAN, QoS, Intrusion Prevention | VPN, Firewall, NAT, QoS, Integrated Wireless |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 128 MB | 128 MB | 256 MB | 128 MB |
| Form Factor | Desktop | Desktop | Desktop | Rack-mount | Desktop |
| Height | 1.73 inches | N/A | 1.44 inches | N/A | N/A |
| High Availability Support | Supported | Not Supported | Not Supported | Supported | Supported |
| Integrated Services | Voice / Video | Voice | Voice, Video, WAN Optimization | Voice, Video, WAN Optimization | Voice, Data, Wireless |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 | RJ-45, SFP | RJ-45 / Combo Ports |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 8 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 512 MB | 256 MB | 256 MB | 512 MB | 256 MB |
| Modular Slots Available | 1 Slot | N/A | N/A | 1 Slot | 1 Slot |
| Network Protocols | IPv4 / IPv6 | IPv4, IPv6 | IPv4, IPv6 | IPv4, IPv6, VPN | IPv4, IPv6 |
| Power | 25 Watt | 26W | 24 W | 75 Watt | 30 W |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply with Redundancy | AC Power Supply |
| Product Name | CISCO891-K9 Integrated Services Router | CISCO871-K9 Integrated Services Router | Cisco 881G-S-K9 | CISCO888GW-GN-A-K9 | Cisco 881 Integrated Services Router with Wireless |
| Product Type | Integrated Services Router | Enterprise Router | Enterprise Router | Gateway | Integrated Services Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | CLI / Web-based | CLI / SNMP / HTTP / HTTPS | Telnet, SSH, SNMP | HTTP, HTTPS, SNMP | CLI, Web, SNMP |
| Routing Protocols | OSPF / RIP / Static Routing | OSPF / EIGRP / RIP / Static Routing | OSPF, EIGRP, RIP, BGP, Static Routing | OSPF / BGP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | N/A | N/A | N/A | N/A | N/A |
| Speed/Capacity | Gigabit | N/A | N/A | Gigabit | Fast Ethernet |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 0.1 Gbps | 0.15 Gbps | 0.15 Gbps | 1 Gbps | 50 Mbps |
| Use Case | Business | Business | Small Business | Enterprise | Small Business / Enterprise Branch |
| VPN Support | IPSec / SSL VPN / DMVPN | IPSec / SSL VPN | IPSec | IPSec / SSL VPN | IPSec |
| WAN Configuration | Dual WAN | WAN | WAN | Dual WAN | WAN |
| WAN Ports | 1 WAN | 1 WAN | 1 WAN | 2 WAN | 1 WAN |
| Weight | 8.96 lbs | N/A | 4 lbs | N/A | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | 802.11b/g |
| Width | 8.27 inches | N/A | 8.66 inches | N/A | N/A |
| Wireless Support | No | No | No | No | Yes |
Cisco 891-K9 offers fantastic performance with secure GigE routing. It's a reliable choice for our enterprise network, handling large data volumes without any issues.
The Cisco 891-K9 delivers excellent security and performance. Its GigE capabilities have helped our network scale efficiently, providing the speed and reliability we need.
Cisco 891-K9 is perfect for high-performance business networks. It provides fast, secure GigE routing and easy configuration, making it ideal for our growing infrastructure.
Solid, reliable router with excellent GigE performance. Cisco 891-K9 ensures secure routing and has been a great addition to our business network infrastructure.
The Cisco 891-K9 is a powerful router for businesses requiring secure GigE connectivity. It's reliable, easy to manage, and offers great performance for our network.
The Cisco 891 GigaE SecRouter is an integrated security router that combines multi‐gigabit WAN/LAN connectivity, stateful firewall, and VPN services in a compact desktop form factor.
It is ideal for small offices, branch locations, and secure teleworker deployments requiring reliable IP routing, firewall protection, and site-to-site or remote-access VPN connectivity.
The router delivers up to 75 Mbps of firewall throughput, supports up to 25 Mbps of IPsec VPN throughput, and offers seven Gigabit Ethernet ports plus one switchable WAN port.
It includes a stateful inspection firewall, Zone-Based Firewall, Network Address Translation (NAT), intrusion prevention (optional), content filtering (optional), and support for IPsec and SSL VPN.
The device supports static routing, RIP v1/v2, OSPF, EIGRP, and policy-based routing for flexible WAN path selection and traffic engineering.
It supports up to 64 VLANs and 16 logical subinterfaces per physical interface, enabling segmented LAN and DMZ configurations.
Management options include Cisco IOS CLI via console or SSH, web-based Device Manager, SNMP v2/v3, and embedded FlexVPN for automated site provisioning.
The Security Bundle license unlocks advanced firewall, intrusion prevention, and advanced VPN features; the IP Base license covers core routing and NAT functionality out of the box.
It ships with an internal universal AC power supply (100–240 VAC) rated at 45 W max, with typical power consumption around 20 W.
The desktop chassis measures 220 mm x 150 mm x 43 mm (8.7” x 5.9” x 1.7”) and weighs approximately 1.2 kg (2.6 lbs).
Operating temperature ranges from 0 °C to 40 °C (32 °F to 104 °F). It complies with FCC, CE, UL, and RCM regulatory standards for safety and emissions.
Connect to the console port, launch the Cisco IOS CLI Setup Wizard, and follow the prompts to configure hostname, IP addresses, default route, and security policies.
No, the Cisco 891 is a standalone unit. For high-availability, deploy active/standby pairs using VRRP or HSRP on supported IOS releases.
Yes, it can be managed via SNMP by Cisco Prime Infrastructure and monitored by Cisco DNA Center for basic device health and configuration compliance.
The router includes a limited lifetime warranty and 90 days of Cisco TAC support. Extended warranty and SMARTnet services are available separately.
Order spare power supplies, rack kits, or console cables through Cisco’s Spare Parts Ordering Portal using the CISCO891-K9 base SKU or consult your Cisco partner.
Access the Cisco Software Download Center for IOS images and release notes, and refer to the Cisco 891 SecRouter Data Sheet and Configuration Guides on Cisco.com.