prefer 147.251.115.0/24 over 78.128.250.0/24 network which is full

This MR introduces:

• prefer 147.251.115.0/24 over 78.128.250.0/24 network which is full

follow up from https://rt.cesnet.cz/rt/SelfService/Display.html?id=1114910

@cloud

approved this merge request

merged

mentioned in commit 4c4d4efc