Troubleshoot Cisco Express Forwarding (CEF) and IP connectivity

Cisco Express Forwarding (CEF) troubleshooting can be tedious and difficult. However, most instances of CEF troubleshooting do not require detailed IOS architecture and platform architecture knowledge. In addition, many issues that appear to be CEF-related turn out to be the result of misconfiguration or inoperable end device. In this sample chapter from Cisco Express Forwarding, study the general troubleshooting methods used on Cisco IOS routers and switches as a first step in troubleshooting IP connectivity problems. Next, learn to determine whether CEF is the root cause of a particular IP connectivity problem. Finally, review a table of basic CEF troubleshooting commands.

Title: Cisco Express Forwarding
ISBN: 1-58705-236-9
Published: April 2007
Authors: Nakia Stringfield, Russ White, Stacia McKee
Chapter: Chapter 4: Basic IP Connectivity and CEF Troubleshooting
Published by Cisco Press