Chapter 10. Troubleshooting Ethernet LANs

This chapter covers the following exam topics:

LAN Switching Technologies

Configure and verify trunking on Cisco switches

DTP

Autonegotiation

Network Device Security

Configure and verify Switch Port Security features such as

Static / dynamic

Violation modes

Err disable

Shutdown

Protect restrict

Troubleshooting

Troubleshoot and Resolve VLAN problems

identify that VLANs are configured

port membership correct

IP address configured

Troubleshoot and Resolve trunking problems on Cisco switches

correct trunk states

correct encapsulation configured

correct VLANs allowed

Troubleshoot and Resolve Layer 1 problems

Framing

CRC

Runts

Giants

Dropped packets

Late collision

Input / Output errors

This chapter focuses ...

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