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CISCO881G-G-K9
881G FE Sec Router with Adv IP Serv, 3G Global GSM/HSPA"
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CISCO881G-G-K9 is a fixed enterprise router engineered for small to medium branch offices, delivering integrated services such as voice, video, and WAN optimization while supporting advanced VPN capabilities. Designed with robust routing protocols including OSPF, BGP, EIGRP, RIP, and static routing, this router leverages its fixed architecture and integrated power supply to ensure consistent performance and secure data transmission.
Featuring a single WAN port and four LAN ports based on 10/100 Ethernet technology, CISCO881G-G-K9 is optimized for reliable wired connectivity and remote management via CLI, SNMP, HTTP, and HTTPS. Its integrated security features, including firewall and intrusion prevention support, coupled with modular expansion through an EHWIC slot and high throughput capacity of 0.045 Gbps, make it a versatile solution for business-critical applications.
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In a multi-site enterprise, the CISCO881G-G-K9 FE Sec Router with Advanced IP Services and 3G GSM/HSPA provides primary VPN connectivity over DSL or Ethernet and automatic 3G failover in case of WAN outage. This ensures uninterrupted site-to-site encrypted communication, minimizes downtime, and preserves business continuity for critical applications such as ERP and VoIP.
A manufacturing plant deploys the CISCO881G-G-K9 as an IoT edge gateway to aggregate sensor data over Gigabit Ethernet and deliver it securely to cloud analytics via 3G backup link. Advanced firewall, IPS, and NAT features protect OT networks from external threats, while continuous connectivity enables real-time monitoring, predictive maintenance, and improved operational efficiency.
A retail chain uses the CISCO881G-G-K9 to secure and accelerate payment transactions across hundreds of stores. The router’s Advanced IP Services optimize WAN performance, and its integrated 3G HSPA modem automatically switches over during primary link failures. This guarantees PCI-compliant secure payments, reduces abandoned carts, and sustains revenue even when the main network is down.
To get the detailed certification, please go to the Compliance Center.
 CISCO881G-G-K9 |  CISCO878W-G-E-K9 |  C888SRST-K9 |  CISCO876W-G-E-K9 |  C888-K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Modular |
| Broadband | N/A | DSL | N/A | N/A | Fiber Optic / DSL |
| Built-in Security Features | Firewall / Intrusion Prevention / VPN | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention |
| Compliance Standards | FCC, CE, UL | FCC, CE, RoHS | FCC, CE, UL | FCC, CE, RoHS | FCC, CE, RoHS |
| Connectivity Type | Wired | Wired / Wireless / Ethernet | Wired | Wired / Wireless | Wired |
| Depth | N/A | N/A | 7.5 inches | N/A | 14 inches |
| Device Type | Router | Gateway | Router | Router | Router |
| EMC | N/A | N/A | N/A | N/A | CE Certified |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100 | 10/100/1000 |
| Expansion Slots | EHWIC | EHWIC | N/A | N/A | SFP+ |
| Features | VPN / IPv6 Compatible / Firewall / Voice / Video | VPN / IPv6 Compatible / Firewall | VPN / VoIP / IPv6 Compatible / Firewall | VPN / IPv6 Compatible / Firewall | VPN, Firewall, IPv6 Compatible |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 256 MB | 128 MB | 128 MB | 512 MB |
| Form Factor | Desktop | Desktop | Rack-mount | Desktop | Rack-mount |
| Height | N/A | N/A | 1.1 inches | N/A | 1.75 inches |
| High Availability Support | Not Supported | Supported | Supported | Not Supported | Supported |
| Integrated Services | Voice / Video / WAN Optimization | Voice / Video | Voice / Video | Voice | Voice, Video, WAN Optimization |
| Interface Ports | RJ-45 | RJ-45 / Combo Ports | RJ-45 / SFP | RJ-45 | RJ-45, SFP |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 512 MB | 512 MB | 256 MB | 4 GB |
| Modular Slots Available | 1 Slot | 1 Slot | N/A | N/A | 2 Slots |
| Network Protocols | IPv4, IPv6 | TCP/IP, UDP, ICMP, SNMP | IP, PPP, Frame Relay, MLPPP | IPv4, IPv6 | IPv4, IPv6, MPLS, VPN |
| Power | 65 W | 20W | 45W | 24W | 150 Watts |
| Power Source | AC Power Supply | AC Power Supply / Redundant | AC Power Supply | DC Power Supply | AC Power Supply / Redundant |
| Product Name | CISCO881G-G-K9 | Cisco 878W-G-E-K9 Integrated Services Router | Cisco C888SRST-K9 | Cisco 876 Wireless Integrated Services Router | C888-K9 Enterprise Router |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Integrated Services Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | CLI, SNMP, HTTP, HTTPS | SSH, Telnet, SNMP, HTTP/HTTPS | Telnet, SSH, SNMP | HTTP, HTTPS, Telnet, SSH, SNMP | SSH, Telnet, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | RIP / OSPF / EIGRP / Static Routing | OSPF / BGP / Static Routing |
| Safety | N/A | N/A | N/A | N/A | UL Listed |
| Speed/Capacity | N/A | N/A | N/A | N/A | Gigabit |
| Stacking Capability | No | No | No | No | Yes |
| Telecom | N/A | N/A | N/A | N/A | FCC Part 15 |
| Throughput Capacity | 0.045 Gbps | 0.1 Gbps | 0.15 Gbps | 20 Mbps | 2 Gbps |
| Use Case | Small Business / Enterprise | Enterprise | Business | Small Business | Enterprise |
| VPN Support | IPSec / SSL VPN / GRE / DMVPN / FlexVPN / N/A | IPSec / SSL VPN | IPSec / SSL VPN / DMVPN / N/A | IPSec | IPSec / SSL VPN |
| WAN Configuration | WAN | WAN | Dual WAN | WAN | Dual WAN |
| WAN Ports | 1 WAN | 1 WAN | 2 WAN | 1 WAN | 2 WAN |
| Weight | N/A | N/A | 5.5 lbs | N/A | 7 lbs |
| Wi-Fi Standard | N/A | WiFi 3 | N/A | WiFi 3 | WiFi 6 |
| Width | N/A | N/A | 8.8 inches | N/A | 17 inches |
| Wireless Support | No | Yes | No | Yes | No |
The Cisco 881G-G-K9 offers excellent performance with advanced IP services and 3G backup. It provides secure, reliable connectivity for our growing enterprise network.
Cisco 881G-G-K9 is a reliable Ethernet security router. The 3G global GSM/HSPA support ensures we always stay connected, making it perfect for our business's remote office needs.
Perfect solution for secure and high-performance Ethernet routing. The Cisco 881G-G-K9 provides excellent backup options with 3G support, ensuring continuous internet connectivity.
Cisco 881G-G-K9 is a great choice for our business network. It offers advanced IP services and 3G backup, ensuring reliable and secure internet connectivity across multiple locations.
The Cisco 881G-G-K9 router offers fast, reliable Ethernet security with 3G backup. It's perfect for our business, providing secure, stable connections for all our network needs.
The Cisco 881G-G-K9 is an Integrated Services router offering eight Fast Ethernet ports, advanced IP services, built-in stateful firewall, VPN, and a 3G GSM/HSPA cellular backup link.
It includes the Advanced IP Services license, providing full IPv4 routing protocols (EIGRP, OSPF, BGP), MPLS, multicast, and advanced Quality of Service features.
The built-in 3G modem supports global GSM and HSPA bands (850/900/1800/1900 MHz), enabling cellular WAN failover or primary connectivity wherever a SIM is available.
Use the Cisco IOS CLI to define a cellular dialer interface, set the APN and SIM credentials, then configure IP sla tracking and backup-interface statements under your primary WAN interface.