VTP Prunning

[hs08]

Hello,

As we know VTP pruning is for to eliminate unneccesary vlan. If we have topology like

sw1-sw2-sw3

Sw2 have vlan 100 and vlan 101

Sw3 have vlan 200 and vlan201

If we enable the vtp prunning, will sw3 get vlan 200 and 201, or because sw2 have no port access vlan 200 and 201, so the sw3 will not get vlan 200 and 201?

[Joseph W. Doherty]

Sw1 has all 4 VLANs?

I recall (?) VTP will prune VLANs undefined on a transit switch.

Years ago had to troubleshoot a network issue I recall (?) caused by this behavior.  What made cause of problem not obvious, VTP pruning (at least then) didn't immediately prune.  I.e. everything worked fine, for several minutes after enabling VTP pruning or reloading switch.

[MHM Cisco World]

I read a lot in CCIE book and some article
I will be explain how we VTP pruning have some issue 
SW1-SW2-SW3 
ALL SW run VTP 
SW1 have VLAN 1,2,3 access port 
SW2 have VLAN 1,2 
SW3 have VLAN1,3

the issue is always the transport SW
in this case the SW2 
when we run VTP  pruning the
SW1 will have VLAN1,2,3 in trunk
SW2 will have VLAN1,2 
SW3 will have VLAN 1,3 

so there is gap in broadcast domain between SW1 and SW3 for VLAN 3
 the solution and as I recommend 

when you finish config always check 
NATIVE VLAN 
ALLOW VLAN and Pruning  VLAN , if there is missing VLAN add it to trunk. 
thanks 
MHM 

[paul driver]

Hello
If the switches have an active port in a vlan and if that vlan is allowed to traverse the trunk then yes each switch will receive their respective vlans.