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Cisco 3900/2900/1900 Series ISR Gen 2 EtherChannel Configuration Guide
This document describes how to configure EtherChannels on Layer 3 ports for Cisco 1900, 2900, and 3900 Series Integrated Services Routers (ISRs). The EtherChannel feature allows multiple physical Ethernet links to be combined into one logical link, providing fault-tolerant high-speed connections between switches, routers, and servers. It ensures automatic recovery by redistributing traffic across remaining links if a segment fails.
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Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Mounting, wiring and first power-up. Read it before the hardware goes in.
Questions answered in these manuals
What is the purpose of the EtherChannel feature?
The purpose is to provide redundancy between the ISR and another device, not to provide scalable bandwidth.
From: Cisco 3900/2900/1900 Series ISR Gen 2 EtherChannel Configuration Guide
Which negotiation protocols are supported for EtherChannel?
Negotiation protocol PAgP and LACP are not supported; all physical ports must be configured manually.
From: Cisco 3900/2900/1900 Series ISR Gen 2 EtherChannel Configuration Guide
What is the intended audience for this guide?
The documentation is designed for the person installing, configuring, and maintaining the router.
Who should perform certain procedures in this guide?
Certain procedures should be performed only by trained and qualified personnel.