guruprasadr Tue, 01/01/2008 - 22:37
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HI Nasheer, [Pls Rate if HELPS]


VTP pruning causes information about each pruning-eligible VLAN to be removed from VTP updates if there are no stations belonging to that VLAN out a particular switch port. Use the set vtp command to enable VTP pruning.


http://www.cisco.com/univercd/cc/td/doc/product/lan/cat5000/rel_4_2/config/vlans.htm#xtocid798016


Do Rate if HELPS


Best Regards,


Guru Prasad R



bvsnarayana03 Wed, 01/02/2008 - 01:38
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The link given by Gurubhai is for configuration on catalyst. If you are searching for IOS switches, here it is:


http://www.cisco.com/en/US/docs/routers/7600/ios/12.2SXF/configuration/guide/vtp.html#wp1032282


This is generally done for optimal use of the trunk. The trunk carries info for all vlans. If there are no hosts for a specific VLAN on the switch connected to trunk, then the traffic for that vlan across trunk is unnecessary. So pruning helps the switch by not sending the unnecesary info on to the trunk.


Refer this link for understanding:


http://www.firewall.cx/vlans-vtp-pruning.php


hope that helps.


pls rate all helpful posts.

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