Cisco Cisco VN 2900 Network Adaptation Interface Installation Guide

This document describes Cisco LAN interface cards and how to connect Cisco LAN interface cards to a 
network. It contains the following sections:

For an overview of Cisco interface cards used for Cisco access routers see the 

 document.

This section describes the 4-port 10/100BASE-TX Ethernet switch interface card (WIC-4ESW) and how 
to connect it to a network. 

The following subsections are included:

The WIC-4ESW interface card is a Layer 2 Ethernet switch with Layer 3 routing capability. (Layer 3 
routing is forwarded to the host, and is not actually performed at the switch.) The ports autosense the 
speed (10 Mbps or 100 Mbps) and duplex mode (full- or half-duplex) of the device to which it is 
connected and then operates at the same speed and in the same duplex mode.