I am working in an inherited environment where I have basically been thrown in feet first. I'm also brand new to VLANs, and only set it up via documentation from other techs in my company.
After struggling for a long time trying to get VoIP phones working both inside and outside of our LAN, another colleague and I finally got a VLAN setup on one of the switches, and the phones started working properly.
Currently, I have 3 network closets, all connected by dual CAT6 cables back to the main closet. All the switches are 802.1Q compatible. One switch has the VLAN to the phone system, as required. What I want to do is get the other switches on a tagged VLAN, but I was wondering why I should or should not make every switch part of that VLAN as well, for future proofing? Is it a good idea to set every port either untagged to one network, or tagged to all VLANs available?
The main problem that I actually care about most, however, is should I only include the Uplink ports on the other switches to be part of the phone's VLAN, Tagged, plus the ports off those individual switches that needs to be part of that VLAN? Or am I making this too complicated for myself?