Cisco 881G-K9 - 881 EN Security Router Manuals & User Guides. User Manuals, Guides and Specifications for your Cisco 881G-K9 - 881 EN Security Router Network Router. Database contains 1 Cisco 881G-K9 - 881 EN Security Router Manuals (available for free online viewing or downloading in PDF): Hardware installation manual . USED Cisco CISCO881-SEC-K9 881 Ethernet Sec Router w/ Adv IP Services. Cisco. 5.0 out of 5 stars. 2 product ratings - USED Cisco CISCO881-SEC-K9 881 Ethernet Sec Router w/ Adv IP Services. $71.00. or Best Offer. Free Shipping. I just got a Cisco 881-SEC-K9, i cant seem to configure it. I have tried to download the software to no avail, tried using the Command Line Instruction, no way; i can even go to the global configuration mode, can anybody help me with a step by step guide to configure it? About the Cisco 881 Router Service Router 881. Cisco 880 Series Integrated Services Routers are fixed-configuration routers that provide collaborative business solutions for secure voice and data communication to small businesses and enterprise teleworkers. They offer concurrent broadband services over third-generation (3G), Metro Ethernet, and multiple DSL technologies to provide business Refurbished Cisco 881 Router with Warranty Cisco 880 Series Integrated Services Routers are fixed-configuration routers that provide collaborative business solutions for secure voice and data communication to small businesses and enterprise teleworkers. They offer concurrent broadband services over third-generation Cisco CISCO881-SEC-K9 881 Advanced IP Services Router. Buy Cisco CISCO881-SEC-K9 881 Advanced IP Services Router from Almiriatechstore. Access Control List (ACL) support, Bidirectional Forwarding Detection (BFD), Link Fragmentation and Interleaving (LFI), Low-latency queuing (LLQ), MAC address filtering, NAT support, Quality of Service (QoS), Spanning Tree Protocol (STP) support, Stateful Re: What is the Difference between Cisco 881- K9 and C881