About jc482065

jc482065 · 05-14-2025

Hi,We are planning to disable legacy config of VTPv2 on a network. Pruning is enabled on the domain. When we attempted to run "VTP mode off" on a switch at the edge of the network, we found that the upstream switch appeared to prune all the VLANs fro...

jc482065 · 07-22-2025

Thanks for pointing out this bug @Robert Saurer and also sharing the workaround about pushing the VTP update. We contacted support after initially discovering this bug, but they didn't initially point out that pushing a vlan.dat update can prevent th...

jc482065 · 06-24-2025

Does this affect devices running version 2, but in transparent mode, or is it just servers and clients?Can't believe something like this slipped through software quality control!

jc482065 · 05-14-2025

The switch we tested on was not an intermediate switch, it was at the edge of the network but connected upstream to a VTP client. I thought both "transparent" and "off" switches don't send VTP so why does the upstream switch prune on one and not the ...

Member Since	‎05-14-2025 03:59 AM
Date Last Visited	‎08-11-2025 08:07 AM
Posts	4

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Turning VTP off with pruning

Re: Catalyst 9000 switches may lose their VLAN database when using VTP

Re: Catalyst 9000 switches may lose their VLAN database when using VTP

Re: Turning VTP off with pruning