Exclude vlan from VTP domain

Answered Question
Jun 11th, 2010
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Is it possible to exclude a vlan from a vtp domain? I would like to add a vlan to the vtp server switch and NOT have it propagate to all client switches.


Thanks,

Correct Answer by Giuseppe Larosa about 7 years 2 weeks ago

Hello Dan,


>> Is it possible to exclude a vlan from a vtp domain? I would like to add a vlan to the vtp server switch and NOT have it propagate to all client switches.


this is not possible.


some options:

ensure you still have another  VTP server  if so you can change mode to VTP transparent on device that needs this vlan


OR


consider the use of a routed link to an external switch


A L3 routed link is not part of vlans so it is not advertised by VTP in this way you could have your "private vlan"


note:

private vlans may be another way to do this but it should be checked if they are propagated by VTP or not.


Hope to help

Giuseppe

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Leo Laohoo Fri, 06/11/2010 - 21:33
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Is it possible to exclude a vlan from a vtp domain? I would like to add a vlan to the vtp server switch and NOT have it propagate to all client switches.

Is this A VLAN in a number of VLANs or only ONE and only VLAN?  If you have only ONE VLAN then go Transparent mode.  If you have a group of VLANs and you just want to exclude one then in your allowed Trunks, just deny that VLAN you don't want to propagate.


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Correct Answer
Giuseppe Larosa Sat, 06/12/2010 - 02:45
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Hello Dan,


>> Is it possible to exclude a vlan from a vtp domain? I would like to add a vlan to the vtp server switch and NOT have it propagate to all client switches.


this is not possible.


some options:

ensure you still have another  VTP server  if so you can change mode to VTP transparent on device that needs this vlan


OR


consider the use of a routed link to an external switch


A L3 routed link is not part of vlans so it is not advertised by VTP in this way you could have your "private vlan"


note:

private vlans may be another way to do this but it should be checked if they are propagated by VTP or not.


Hope to help

Giuseppe

Daniel Graham Sat, 06/12/2010 - 18:31
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Thats what I was afraid of. I am not able to use a routed link in this setup unfortunately. I have never had a need for this before, thought I would check here as I did not figure out a way to do it.


Thanks for everyones input. I can exclude vlan on trunks so it cant be used on other areas of the network, but I'd rather not do so. I will figure something out.


Thanks again.

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