Limiting VTP Using Pruning
Because you now have a tool to distribute the VLANs across multiple different switches, you also need a tool to control and minimize the risks associated with doing so. This tool is VTP pruning. VTP pruning optimizes the usage of network bandwidth by restricting the flooded traffic to only those trunk ports that can reach all the active network devices. When this protocol is in use, a trunk port does not receive the flooded traffic that is meant for a certain VLAN unless an appropriate join message is received. Figure 10-5 demonstrates how VTP pruning works.
Figure 10-5 VTP Pruning
Note
VTP maintains a list of ...
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