OLT Distribution ONU (GPON) Management IP Problem

Hello everyone!

I am learning OLT configuration recently, and I want to ask a small question. We deliver the management IP address and VLAN to the ONU on the OLT, but how can we avoid the IP address from rushing when assigning IP addresses?
For example, the IP address in the following command line is divided to avoid conflict with the IP addresses of other ONUs.

ont ipconfig 0 0 static ip-address 10.13.76.50 mask 255.255.128.0 vlan 3470 priority 0 gateway 10.13.127.254

My Boss said to input display current configuration one by one to see which IPs are used. This may be possible but the efficiency is too low and the eyes are spent.
In other words, how to quickly query the ONU IP address used in the OLT.

Thank you for your help!