Trouble Ticket 6 VLAN and Spanning-Tree Lab
Just as loops can occur in the upper layers because of mutual redistribution and improper filtering, they can also occur at Layer 2. Back in Chapters 6 and 7 I spent some time on the Spanning Tree Protocol (STP). STP assists with bridge/switch loops and it is normally not the best practice to just turn it off. As a matter of fact, Cisco performs a per-VLAN STP. VLANs help you segment your broadcast domains and use a lesser number of routers while doing so. However, the ideal design is still hierarchical in nature.
In this Trouble Ticket, you are just starting to implement VLANs and are thinking about upgrading your 1900 switch. For now, knappsnarrows and hostb are both in the default VLAN 1, which requires ...
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