VTP question

[brettkarhinen]

Does turning VTP off completely on a switch that is currently running it in transparent mode have any adverse effects?  What about turning it off when it's in VTP server mode?  I'm unfamiliar with VTP, and we recently acquired a small network that had VTP running on a few switches.  We want to turn it off with as little impact as possible.

Thanks

[nelson.garcia]

It's my understanding that you don't turn VTP 'off', it just runs in transparent mode.

As far as turning it off on a switch running in server mode. I don't think much of anything would happen, just don't expect your vlans to propagate to other switches if that's what you want, and it's the only VTP server in your domain.

[lal.antony]

@Bertt,

From what I know I think if you turn the VTP server off it stops passing any VLAN information through, which happens in the transparent mode. So if turning off VTP on your up stream switch your VLAN database information wont be pass through to other switches connected down stream from the switch.

If you have the up stream switch in Transparent mode it wont participate in VTP information BUT it will pass the VTP database information to down stream switches.

So basically if you turn VTP off on a switch any switches connected down stream from that won't get any VTP information and make the VLAN database management manual.

Hope this helps

Cheers

Lal Antony

www.lalantony.com

[brettkarhinen]

Thanks for the replies.  I may just turn everything to transparent mode and leave it at that.  We need to be able to use extended range VLANs, and according to the Cisco doc I found on that:

"VTP learns only normal-range VLANs, with VLAN IDs 1 to 1005; extended-range VLANs are not stored in the VLAN database. The router must be in VTP transparent mode when you create extended-range VLANs."

So, final question, I just want to make sure, nothing will happen to the current VLAN database on that switch when I go from server to transparent mode, correct?  It'll just stop participating in VTP.

Thanks again.

[nelson.garcia · Accepted solution]

Correct.

[brettkarhinen]

Good stuff, thanks.