Should VLAN pruning be bi-directional?

[apoustie]

When manually pruning VLAN's with the allowed vlan command, should you prune the vlan's going back up the switch hierarchy as well as down?

[daniel.bowen]

You need to prune at the distribution level, pruning at the access layer will not really achieve anything. My advice though would be to ebale VTP pruning and let that take care of it for you

Daniel,

[bsivasub]

To answer this question yourself, think why you do pruning in the first place. you send unwanted vlan data across to the other switch and you want to avoid it.

now on each trunk, make that decision. it doesn't have to match and as the other post suggested, enabling vTP pruning would be probably be the best but somtimes it is not possible due to vtp mode being transparent.