@george1421 thanks - good steps to check.
Yes, I can ping from that subnet, and I can also tftp the file from one of my linux hosts on that subnet with no issues. There is a router in between, but it’s not filtering traffic to my knowledge. It is passing DHCP requests to our windows DHCP server for that subnet/vlan however.
And yes, the ip address is correct, the router is sat on 10.1.22.254.