Private VLAN Trunk Ports
Hi,
Looking at private vlans, I get the whole concept and configuration of community, isolated and promiscuous, although not so clear on the 'trunking' element. If I have a topology like the below (as used in the example in the pvlan video for L2 Deep Dive), what config do I need on the ports between SW1 & SW2? Is it a very simple case of 'switchport mode trunk & switchport trunk allowed 1000, 1012, 1034, 1055' or do I need some specific private vlan keywords e.g. 'switchport mode private-vlan trunk secondary...'
Thanks
Dominic
Comments
Hi Dominic,
Only the "switchport mode trunk" & "switchport trunk allowed-vlan" command would suffice for your requirement. No specific command regarding private-vlan is used as part of your trunking solution.
Hope this helps!
As far as the vlans being trunked, you could think of them as regular vlans, all needing to be trunked. You could also use VTP version 3 on private vlans.
It is just a regular trunk link. If you choose to limit the VLANs allowed on the trunk, make sure that you allow both primary and secondaries PVLANs. I also suggest you tagging the native VLAN or using a dummy native VLAN.
If you are sticking with VTP version 2, you will need to have VTP on transparent mode. If you have VTP version 3, there is no restriction.
Great, thanks guys, that's solidified my understanding.
Rgds
Dominic