I want to turn on vlan tagging on my main cisco catalyst 3560 so that frames leaving the switch are tagged (and visible on my layer 2 managed switches on the far side of my network) but at the same time I also want to accept both tagged and untagged frames until I can better map the network. I do have other brands of switches that I'll be getting to work with the vlans defined on this 3650 (etherwan and 3COM/HP) so 802.1Q tagging is what I'm going with and, eventually, I need to be able to have the vlans span (?) from the primary switch to the others.
Can someone help me get started with the IOS foo to accomplish some of this? I have VLANs configured but I don't see any tagging in the frames.