Cisco VLAN is created but still down and unresponsive

I was having issues with my older cisco switch not properly routing new vlans. I saw the interface was down, but the vlan interface existed, and it had an IP bound to it. When I would test ping I would get TTL expired in transit. So I would do something like this: int vlan 55 ...

great explanation of vlans and layer 2 vs layer 3 switching

Virtual LANs (VLANs) are an abstraction to permit a single physical network to emulate the functionality of multiple parallel physical networks. This is handy because there may be situations where you need the functionality of multiple parallel physical networks but you’d rather not spend the money on buying parallel hardware. I’ll be speaking about Ethernet ...