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What is VTP pruning and is it supported on the Catalyst 3900?

April 26, 2017catalyst pruning supported vtp

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What is VTP pruning and is it supported on the Catalyst 3900?

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A. VTP pruning is used in order to prevent unnecessary flooding of broadcast information from one vlan across all trunks, since the switches do not know which vlans exist in a remote switch. VTP pruning permits switches to negotiate which vlans are assigned to ports at the other end of a trunk and hence, prune the vlans that are not assigned remotely. Pruning is disabled by default. Pruning is supported in Catalyst 3900 version 4.1(1) and later.