United States$5,000,000+
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Ethan Roberts
5
Reliable Ethernet router with 3G backup support. Ensures business continuity during primary link outages.
CISCO881G-K9
Cisco 881G Ethernet Sec Router w/ 3G B/U
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Name:
CISCO881G-K9
- Description:
- Cisco 881G Ethernet Sec Router w/ 3G B/U
- Rating:
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- Availability:
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- Brand:
- Cisco
- GTIN:
- 703669854877
- Condition:
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CISCO881G-K9 Overview
CISCO881G-K9 delivers a fixed router architecture engineered for small business and branch office environments with integrated services, including robust VPN support, advanced firewall features, and comprehensive routing protocols. Designed for high performance, this router offers a reliable AC power option, a dedicated WAN port alongside four LAN ports supporting 10/100 Ethernet connectivity, and integrated voice capabilities to serve converged data and communication needs.
CISCO881G-K9 incorporates built-in VPN features such as IPSec and DMVPN to secure remote connectivity while ensuring efficient throughput of up to 0.05 Gbps. Although configured as a fixed, desktop router without modular expansion slots or redundant power support, it delivers essential integrated services—including voice, QoS, and firewall protection—for small business use cases that demand secure, cost-effective, and high-performance connectivity.
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CISCO881G-K9 Specifications
- Power Source
- AC Power Supply
- Flash Memory
- 256 MB
- Memory
- 512 MB
- Ethernet Technology
- 10/100
- Form Factor
- Desktop
- Width
- 8.7 inches
- Weight
- 4.6 lbs
- Product Type
- Enterprise Router
- Architecture
- Fixed
- Wi-Fi Standard
- N/A
- Connectivity Type
- Wired
- Wireless Support
- No
- Firewall Features
- Yes
- Management
- Managed
- High Availability Support
- Not Supported
- Telecom
- N/A
- QoS Features
- Supported
- Stacking Capability
- No
- 5G Support
- No
- Interface Ports
- RJ-45
- Device Type
- Router
- WAN Configuration
- WAN
- Broadband
- N/A
- Speed/Capacity
- N/A
- LAN Ports
- 4 LAN Ports
- Use Case
- Small Business
- Integrated Services
- Voice
- Built-in Security Features
- Firewall / Intrusion Prevention
- Network Protocols
- IPv4 / IPv6
- Compliance Standards
- FCC / CE
- WAN Ports
- 1 WAN
- Safety
- UL / CE
- VPN Support
- IPSec / DMVPN
- Throughput Capacity
- 0.05 Gbps
- Modular Slots Available
- N/A
- Expansion Slots
- N/A
- Remote Management
- CLI / SNMP
- Routing Protocols
- OSPF / EIGRP / RIP / BGP / Static Routing
- Height
- 1.2 inches
- EMC
- FCC
- Features
- VPN / VoIP / IPv6 Compatible / Firewall / NAT / QoS
- Power
- 48 Watt
- Product Name
- CISCO881G-K9
- Depth
- 7.4 inches
CISCO881G-K9 Use Case
Resilient Enterprise Branch Connectivity with 3G Backup
A multinational retailer deploys the Cisco 881G-K9 at dozens of suburban branches, establishing IPSec VPN tunnels over primary Ethernet links and auto-failing over to integrated 3G backup when outages occur. Benefit: Delivers 99.9% network uptime for POS systems and corporate apps, preventing revenue loss and ensuring seamless customer service.
Secure Pop-Up Retail and Event Network
An event management firm uses the Cisco 881G-K9 to quickly spin up encrypted WAN links at trade shows and pop-up stores, leveraging its 3G backup for instant, reliable connectivity without fixed lines. Outcome: Achieves PCI-compliant transactions, zero installation delays, and on-demand scalability, boosting sales and customer satisfaction.
Rapid-Deploy Field Office for Emergency Services
A disaster relief agency outfits mobile command centers with Cisco 881G-K9 routers to establish secure VPN backhaul over Ethernet or 3G cellular networks in remote or damaged areas. Benefit: Enables real-time coordination, GIS data transfer, and voice communications under any conditions, accelerating response times and saving lives.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 CISCO881G-K9 |  CISCO888-K9 |  CISCO887VGW-GNE-K9 |  CISCO887-SEC-K9 |  CISCO851W-G-A-K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Modular | Fixed | Fixed | Fixed |
| Broadband | N/A | N/A | N/A | N/A | DSL / Cable / N/A |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention / Malware Protection | Firewall, Intrusion Prevention, Malware Protection | Firewall, Intrusion Prevention, Malware Protection |
| Compliance Standards | FCC / CE | IEEE 802.3, FCC, CE | FCC, CE, RoHS | FCC, CE | IEEE 802.3, IEEE 802.11b/g |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired / Wireless |
| Depth | 7.4 inches | 15 inches | N/A | 7.6 inches | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | FCC | N/A | N/A | N/A | N/A |
| Ethernet Technology | 10/100 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100 |
| Expansion Slots | N/A | EHWIC, NIM | EHWIC | EHWIC | N/A |
| Features | VPN / VoIP / IPv6 Compatible / Firewall / NAT / QoS | VPN / IPv6 Compatible / Firewall / NAT | VPN, Firewall, Intrusion Prevention, IPv6 Compatible | VPN, Firewall, Intrusion Prevention, QoS, NAT, ACL | VPN, Firewall, Integrated Wireless, VoIP |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 256 MB | 256 MB | 256 MB | 128 MB |
| Form Factor | Desktop | Rack-mount | Desktop | Desktop / Rack-mount | Desktop |
| Height | 1.2 inches | 1.75 inches | N/A | 2.4 inches | N/A |
| High Availability Support | Not Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice | Voice / Video / Data | Voice, Video, WAN Optimization | Voice, Video, WAN Optimization | Voice, Video, WAN Optimization |
| Interface Ports | RJ-45 | RJ-45, SFP, Combo Ports | RJ-45, SFP | RJ-45, SFP | RJ-45 |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 512 MB | 1 GB | 512 MB | 512 MB | 256 MB |
| Modular Slots Available | N/A | 2 Slots | 1 Slot | 1 Slot | N/A |
| Network Protocols | IPv4 / IPv6 | IPv4, IPv6, MPLS | IPv4, IPv6 | TCP/IP, UDP, ICMP, IGMP, SNMP | TCP/IP, UDP, ICMP |
| Power | 48 Watt | 65 Watt | 65W | 65 Watts | 65 Watt |
| Power Source | AC Power Supply | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply / DC Power Supply / Redundant |
| Product Name | CISCO881G-K9 | CISCO888-K9 | Cisco 887VGW-GNE-K9 | Cisco 887 Integrated Services Router Secure (CISCO887-SEC-K9) | CISCO851W-G-A-K9 |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | CLI / SNMP | SNMP, SSH, HTTPS | CLI, SNMP, HTTP/HTTPS | SSH, Telnet, SNMP | Telnet, SSH, SNMP |
| Routing Protocols | OSPF / EIGRP / RIP / BGP / Static Routing | OSPF / BGP / EIGRP / Static Routing | OSPF / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / Static Routing |
| Safety | UL / CE | UL, CSA | N/A | N/A | N/A |
| Speed/Capacity | N/A | Gigabit | Gigabit | Gigabit | 100 Mbps |
| Stacking Capability | No | Yes | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 0.05 Gbps | 2 Gbps | 1 Gbps | 75 Mbps | 100 Mbps |
| Use Case | Small Business | Enterprise | Enterprise | Enterprise / Business | Enterprise / Small Business |
| VPN Support | IPSec / DMVPN | IPSec / SSL VPN / DMVPN | IPSec / SSL VPN / GRE / N/A | IPSec / SSL VPN | IPSec |
| WAN Configuration | WAN | Dual WAN | Dual WAN | Dual WAN | WAN |
| WAN Ports | 1 WAN | 2 WAN | 2 WAN | 2 WAN | 1 WAN |
| Weight | 4.6 lbs | 12 lbs | N/A | 7 lbs | N/A |
| Wi-Fi Standard | N/A | N/A | N/A | N/A | WiFi 4 (802.11g) |
| Width | 8.7 inches | 17.5 inches | N/A | 8.6 inches | N/A |
| Wireless Support | No | No | No | No | Yes |
Reviews & Ratings
I
Isabella Brown
4
Cisco 881G offers stable performance and dependable failover. A practical solution for small branch offices.
B
Benjamin Scott
5
Solid routing and backup connectivity. Easy to configure and performs reliably in daily operations.
O
Olivia Carter
3
Good balance of performance and security. The 3G backup adds extra reliability for critical sites.
L
Lucas Harris
4
Trusted Cisco quality. Provides stable Ethernet routing with reliable backup connectivity options.
Questions & Answers
What is the Cisco 881G-K9 Integrated Services Router?
The Cisco 881G-K9 is a compact, entry-level integrated services router with built-in 3G cellular backup, eight switched Ethernet ports and advanced security, designed for small offices and branch deployments.
What are the key features of the Cisco 881G-K9 router?
Key features include hardware-encrypted VPN (IPsec, SSL), eight 10/100 Mbps switched Ethernet ports, dual WAN with DSL and 3G cellular backup, Cisco IOS security services and QoS traffic management.
How many Ethernet ports does the Cisco 881G-K9 offer?
The router provides eight 10/100 Mbps switched Ethernet LAN ports plus one 10/100 Mbps Ethernet WAN port for DSL or cable connectivity.
How does the 3G cellular backup work on the 881G-K9?
When the primary DSL or cable link fails, the built-in 3G WWAN module automatically switches traffic to a cellular network, ensuring uninterrupted Internet access.