From: Larry Roberts (groupstudy@american-hero.com)
Date: Thu Oct 28 2004 - 21:34:33 GMT-3
IF the switch doesn't have any port configured for that VLAN, and none of
its downstream neighbors need that vlan it will send a prune upstream.
The switch listens for prunes from its downstream neighbor, and assuming it
recieves a prune ( or prunes if multiple downstream neighbors exist ) AND it
doesn't have any ports in that VLAN, then it will send a prune upstream.
The upstream neighbor duplicates the process until you get to the root
bridge.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Elliott Reyes
Sent: Thursday, October 28, 2004 7:26 PM
To: ccielab@groupstudy.com
Subject: VTP pruning
When you enable VTP pruning . You enable pruning globally correct 1st.
SW1#vtp pruning
Pruning switched on
SW1#
Under the trunk ports you enter.
SW1(config-if)#switchport trunk allowed vlan ?
WORD VLAN IDs of the allowed VLANs when this port is in trunking mode
add add VLANs to the current list
all all VLANs
except all VLANs except the following
none no VLANs
remove remove VLANs from the current list
SW1(config-if)#switchport trunk allowed vlan add ?
WORD VLAN IDs of the allowed VLANs when this port is in trunking mode
SW1(config-if)#switchport trunk allowed vlan add
Here you either allow the vlans or remove the vlans. I understand that.
Questions is this ?
If I enable this on the server. Do I need to do go to each client and remove
the vlans if they have already all been propogated to the clients ????
Elliott
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