Navigating to Hubitat.local works as expected. In fact, navigating to the parameter…
http://hubitat.local/local/Ba_Dum_Tss.mp3
…pulls up an audio player and plays the sound as expected. However, it does NOT play in the rule unless I use the ip like so…
http://10.0.021/local/Ba_Dum_Tss.mp3
As for your other question, I actually originally simply tried to make a DHCP reservation for the hub assigned to 10.0.0.50. I’m no expert here but I have various other devices reserved (I.e my google homes and my frame tv) and they all work fine. When I tried it with the hub, despite multiple hub and router resets, the hub never resolved to the IP and I couldn’t find it through the portal any longer.
Then I read this post and got nervous about fooling around too much: Give the hub a static IP? - #6 by bravenel
Then, I saw Hubitat has some native support for a static IP…
https://docs.hubitat.com/index.php?title=Network_Setup#Static_IP_address
However, setting that up again prevented me from finding my hub through the portal and I had to use the physical switch to set the hub back to DHCP mode.
Which is then when I posted here 
@bertabcd1234 any thoughts based on all that?
