Hi:
> I defined the EPICS_CA_ADDR_LIST=127.0.0.1
That's your problem.
127.0.0.1 is not a broadcast address.
Read https://wiki-ext.aps.anl.gov/epics/index.php/How_to_Configure_Channel_Access, and find the broadcast address of the host which runs your IOCs.
Hint: It's an IP address that tends to end in 255.
-Kay