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Beginner

VTP pruning

HI 

What is the difference between  VTP pruning & VLAN pruning in trunk, both are configured by manually and both features prevents the VLAN frame in trunk, then what is the difference ?

Thanks in advance 

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VIP Mentor

Re: VTP pruning

Hello,

 

as Alex explained, VTP pruning is a lot easier to configure, since you only need to enable it on the VTP server. In addition, the 'switchport trunk allowed' command is static, that is, should there be a port connected to a Vlan that you actually want to traverse the trunk, you will have to manually change that, while VTP would adjust dynamically...

5 REPLIES 5
VIP Mentor

Re: VTP pruning

Hello,

 

not sure what you mean...VLAN pruning is done through VTP. Or do you mean 'trunk allowed vlan' vs VLAN pruning ?

Beginner

Re: VTP pruning

Yes

Alex explained  the concepts that I can understand, my question is both pruning VLAN through VTP or on the trunk itself ( ex: sw tr allowed vlan x) need to be configured manually , 

So what is the difference ? What VTP simplifies the administrator overhead in this scenario.

Thank you 

Contributor

Re: VTP pruning

VLAN trunking protocol is a Cisco proprietary way of managing VLANs across a network. VTP pruning is a feature of VTP that will automatically remove VLANs from trunks on switches where the VLAN is not used.
VLAN pruning would be the practice of manually allowing specific VLANs across a trunk with the switchport trunk allowed vlan command.
The best practice is to set all switches to VTP mode transparent and manually add all of the VLANs that are needed on each device. You then trunk each device and allow the necessary VLANs.

Please mark helpful posts.
VIP Mentor

Re: VTP pruning

Hello,

 

as Alex explained, VTP pruning is a lot easier to configure, since you only need to enable it on the VTP server. In addition, the 'switchport trunk allowed' command is static, that is, should there be a port connected to a Vlan that you actually want to traverse the trunk, you will have to manually change that, while VTP would adjust dynamically...

Beginner

Re: VTP pruning

Got it ,thank you 

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