I have some confusion about these two different commands.
"switchport trunk allowed" is the command I thought was used to restrict (i.e. prune) a vlan from a trunk.
Recently I encountered a config where "switchport trunk pruning" was used. Cisco documentation isn't clear to me about this "pruning" command. The docs seem to suggest that this merely stops broadcast traffic for the particular vlan.... unicast traffic (I think) will still cross the trunk.
Do I understand this correctly?