half-duplex

Node.js program that crawls a Cisco network using CDP and finds all of the half-duplex ethernet interfaces. The goal is the discovery of speed/duplex mismatches. Sends the result via email.

install

• install node.js
• install half-duplex

npm install half-duplex

configure

• Rename config file.

ren config.js.example config.js

• Configure parameters in config.js as follows.

seedDevices: One device per CDP island.
community: SNMPv2c community string.
smtpServer: SMTP relay accessible to the host.
emailFrom: Email from address.
emailTo: Email to address.
ignoreDevices: Exclude devices from polling.

usage

cd c:\pathto\half-duplex  
npm start

windows task scheduling

program: npm
arguments: start
start in: c:\pathto\half-duplex