I have a few different types of managed switches, including mostly 3com Super Stacks, Baselines (for example, one specifically is a 3com baseline pwr-plus 2928).
Most of them are configured with two VLANs, one for data, one for voice (VOIP).
It all works fine, but spanning tree is OFF completely, and I would like to turn it on, to help protect the network.
I have found when I turn it on, the phones end up going down. I believe what is happening, is that they are not able to get DHCP with STP on.
Doing some searching, I found an article talking about a different model switch, and that you have to turn on PortFast (or possibly turn it off). However, I do not see anything like that, looking through the various settings screens in my switches.
First, does that make sense, or is there possibly a different solutions? If it makes sense, what might I be looking for, for terminology turn on/off PortFast?