Jon Marshall Tue, 08/03/2010 - 08:03

The configuration documents for the specific switch will show you how to do this. What is the switch model you are using ?

Jon

Sebastian Helmer Tue, 08/03/2010 - 08:25

Hey,

first privat vlans are only possible in vtp mode transparent.

- create a primary vlan (vlan A; private-vlan primary)

- Optional you can create a isolated or community vlan and associate it with the primary (vlan B ;private-vlan isolated or private-vlan        community;Enter primary vlan config mode and use private-vlan association [addremove] secondary_vlan_list)

To verify use:

show vlan private-vlan [type]

or

show interfaces status

please look here to find the neccesarry commands in detail for 3750:

http://www.cisco.com/en/US/customer/docs/switches/lan/catalyst3750/software/release/12.2_52_se/configuration/guide/swpvlan.html#wp1038781

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