Thanks Lee. I'm no expert either obviously. Even though I hold no certifications I read and study anything I don't know until I'm pretty comfortable that I have a good baseline knowledge of it.
Though vlan 1 is the default vlan out of the box, following recommended protocols I changed it to a different vlan. In my case vlan 50. So in my case 5T is out voice vlan and 50UP is the default vlan allowing everything through to the desktop.
Elsewhere on this forum I found one or two other posts similar to mine. In one, they suggested that it could be that smartports are on. In our case they are on, I remember our installation vendor setting them to on. The switch then automatically senses attached devices and tries to set the vlans appropriately. I think this is exactly what's happening. When rebooted/powered back on the smartport program is setting all the phone ports to what it "thinks" is correct- which are different than the vlans we manually setup.
I spoke to our vendor on Friday and they agreed, saying smartports should not be enabled (obviously contradicting what the told us and setup during the original installation).
So this morning, before everyone else got in I disabled the auto smartports- which changed a whole host of port vlan settings, which basically shut down access to everything- so I had to quickly re-enable smartports and manually reset the vlans on those ports.
I will have to do this some time after hours so I can see exactly what it changes and get them all set manually after disabling smartports.
