Troubleshooting Layer 2 problems can be a challenging process. The
configuration and operation of these protocols is critical to creating a
functional, well-tuned network.
This module explores the following Layer
2 protocols and technologies and outlines troubleshooting strategies and common
problems for each of them:
- Switches and switched technologies
- PPP
- ISDN
- Frame Relay
The interaction of Layer 3 protocols with various Layer 2 protocols is
often the source of network problems. Specific examples and trouble shooting
techniques for routed and routing protocols in various Layer 2 environments are
also examined.