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Model Number:
CISCO881-K9 Cisco Router
Cisco 881 Ethernet Sec Router


CISCO881-K9 Overview

Replacement: C881-K9

The 10/100-Mbps fast Ethernet models of the Cisco 881 Integrated Services Routers combine Internet access, security and wireless services onto a single, secure device. This router offers broadband speeds and simplified management to small businesses, and enterprise small branch and teleworkers.

Quick Specs

Figure 1 shows the appearance of CISCO881-k9.

Quick Specs

Table 1 shows the quick spec.

Product CodeCISCO881-K9
Rack Units1 RU
WAN Ports1 x 10Base-T/100Base-TX – RJ-45
LAN Ports4 x 10Base-T/100Base-TX – RJ-45
Management Ports1 x console – RJ-45
USB1 x 4 PIN USB Type A
DRAM256 MB (installed) / 768 MB (max)
Flash Memory128 MB
Dimensions32.5 cm x 24.9 cm x 4.4 cm
Weight2.5 kg
Package Weight4.84 Kg

Product Details

Figure 2 shows the front panel of CISCO881-K9.


(1)LED Area
(2)USB Port for External Device

If you need 3G wireless WAN option provided, Cisco 881G series would have a 3G card left beside the USB port, meeting your need.

Figure 3 shows the back panel of CISCO881-K9.


(1)WAN: 1 x 10Base-T/100Base-TX – RJ-45
(2)LAN: 4 x 10Base-T/100Base-TX – RJ-45
(3)Management: 1 x console – RJ45
(4)USB: 1 x 4 PIN USB Type A
(5)Reset Button
(6)Power Connector
(7)Security Cable Lock
(8)Power over Ethernet(Factory Option)

(1)Four-port 10/100 Fast Ethernet managed switch with VLAN support; two ports support Power over Ethernet (PoE) for powering IP phones or external access points.

(2)Secure 802.11g/n access-point option based on draft 802.11n standard with support for autonomous or Cisco Unified WLAN architectures

(3)CON/AUX port for console or external modem

(4)One USB 1.1 port for security eToken credentials, booting from USB, and loading configuration.

More Details:

The Cisco 880 Series provides:


(2)Content filtering

(3)VPNs, and WLANs, at broadband speeds to small offices

(4)Easy deployment

(5)Centralized management features

Available options on the Cisco 881 Integrated Services Router include:

(1)Survivable Remote Site Telephony for teleworker and small branch voice

(2)Built-in advanced security, including intrusion prevention, GET VPN, dynamic multipoint VPN (DMVPN) for up to 20 site-to-site VPN tunnels

(3)Cisco Configuration Professional for simplified management

(4)WAN connection with multiple access options

(5)Business continuity with primary and backup connections on the Cisco 880 router, including third-generation wireless and ISDN

The Accessories

Table 2 shows the recommended accessories of CISCO881-K9

CAB-AC=CAB-AC= AC Power Cord (North America), C13, NEMA 5-15P, 2.1m
CAB-ETH-S-RJ45Cisco Router Cable CAB-ETH-S-RJ45

Compare to Similar Item

Table 3 shows the comparison between CISCO881-K9 and CISCO891-K9.

Product TypeRouter – 4-port switch (integrated)Router + 8-port switch (integrated)
DRAM256 MB (installed) / 768 MB (max)512 MB (installed) / 768 MB (max) – DDR2 SDRAM
Flash Memory128 MB256 MB (installed) / 256 MB (max)

CISCO881-K9 Specification

CISCO881-K9 Specification 
ManufacturerCisco Systems, Inc
Manufacturer Part NumberCISCO881-K9
Product TypeRouter – 4-port switch (integrated)
Form FactorDesktop
Connectivity TechnologyWired
Data Link ProtocolEthernet, Fast Ethernet
CapacityIPSec VPN tunnels : 20
Network / Transport ProtocolL2TP, IPSec, FTP, DHCP, DNS, L2TPv3, DDNS
Remote Management ProtocolTelnet, SNMP 3, HTTP, HTTPS, SSH
Encryption AlgorithmLEAP, DES, Triple DES, SSL, PEAP, TKIP, PKI, 128-bit AES, 192-bit AES, 256-bit AES
Authentication MethodRADIUS, TACACS+
FeaturesNAT support, VPN support, load balancing, VLAN support, auto-uplink (auto MDI/MDI-X), IGMP snooping, traffic shaping, Stateful Packet Inspection (SPI), content filtering, DiffServ support, MAC address filtering, IPv6 support, High Availability, Intrusion Prevention System (IPS), URL filtering, Stateful Failover, Class-Based Weighted Fair Queuing (CBWFQ), Weighted Fair Queuing (WFQ), Spanning Tree Protocol (STP) support, Access Control List (ACL) support, Quality of Service (QoS), Link Fragmentation and Interleaving (LFI), Dynamic Multipoint VPN (DMVPN), WAN failover, DHCP server, Virtual Route Forwarding-Lite (VRF-Lite), DNS proxy, Bidirectional Forwarding Detection (BFD)
Compliant StandardsIEEE 802.1D, IEEE 802.1Q, IEEE 802.1x
DRAM Memory256 MB (installed) / 768 MB (max)
Flash Memory128 MB
LED Status Lights IndicatorsPort status, power
Connectivity Slots 
Router InterfacesLAN : 4 x 10Base-T/100Base-TX – RJ-45
Management : 1 x console – RJ-45
WAN : 1 x 10Base-T/100Base-TX – RJ-45
USB : 1 x 4 PIN USB Type A
Power Supply 
Power DevicePower adapter – external – 60 Watt
Voltage RequiredAC 120/230 V ( 50/60 Hz )
Dimensions / Weight / Miscellaneous 
Dimensions(Width×Depth×Height)32.5×24.9×4.4 cm
Weight2.5 kg
Compliant StandardsCISPR 24, EN 61000-3-2, EN55022, ICES-003, EN 61000-3-3, EN55024, CISPR 22, EN50082-1, EN55022 Class B, ICES-003 Class B, EN 61000-6-1, AS/NZ 3548 Class B, EN 60555-2, FCC CFR47 Part 15, EN300-386, FCC CFR47 Part 15 B, VCCI V-3
IOS Software IncludedCisco IOS Advanced Security