Hold Over Mode on Ericsson DUW

Hello Experts,
Can someone help explain to me what it means for the clock to be in HOLD OVER MODE and how to resolve ?

To give context to the above . I am changing IUB IPs on a cluster of sites. Clock is LOCKED before the change but after the change it goes into HOLD OVER MODE

Hi @King, HOLDOVER MODE means what all sync sources are losts and BS get synchronization from its internal clock. This may cause KPI degradation. Check connectivity with defined sync sources, usually it is IUB network on RNC.

thanks
i will check and feedback