Analyzing VLANs and VLAN Trunks
Lesson 6: Checking Trunk Status
A switch’s forwarding process, as discussed earlier in the section “Analyzing the Forwarding Path,” depends in part on VLANs and VLAN trunking. Before a switch can forward frames in a particular VLAN, the switch must know about a VLAN and the VLAN must be active. And before a switch can forward a frame over a VLAN trunk, the trunk must currently allow that VLAN to pass over the trunk.
This final of the five major sections in this chapter focuses on VLAN and VLAN trunking issues, and specifically issues that impact the frame switching process. The four potential issues are as follows: ...
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