show trunk pruning

[dja98]

What CLI will show me what VLANs are permitted/excepted on a given port ?

show vlan ?

[dja98]

show interface trunk ?

[dja98]

I got it,

show interface switchport

but now I have another question
what is the difference between these two statements ?

switchport trunk pruning vlan 3-4

switchport trunk allowed vlan remove 3-4

[lammle]

Removing the VLANs from the trunk means that no VLAN information from those vlans will be sent down the trunk.

Pruning means that if you have a switch connected with a trunk and there are no ports for vlan 3, for example, configured on a switch port, then no broadcasts for vlan 3 will be sent down that trunk.
So pruning stops broadcasts from going down a trunk link, but only if there are no configured ports for that vlan.

Todd