VLAN is created on the switch but in a down state. If it shows “down,” make sure there's at least one port that's identified as part of the specified VLAN, or a switch virtual interface in that VLAN. VLAN trunking issues SymptomIn order to find and fix connectivity problems caused by Virtual Local Area Networks (VLANs), VLAN troubleshooting entails a methodical approach to examining the setup and condition of network devices. Given that VLAN issues can impede host connectivity and proper network operation, this ability is. The sections in this chapter describe common LAN switch features and solutions to some of the most common LAN switching problems. These topics are covered: If you are new to LAN switching, these sections take you through some of the main concepts related to switches.
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