traffic imbalance between IU-PS ports in RNC

[rimoucha]

Dear experts,

We noticed traffic imbalance between IU-PS ports for some RNCS below is an example:

RNC_Subrack_Slot_port	DL+UL MAX speed (Mb/s)
RNC1_0_18_0	722.3148496
RNC1_0_18_1	0.0046448
RNC1_1_20_0	758.5830944
RNC1_1_22_0	755.9193248
RNC1_2_18_0	768.2471664
RNC1_3_20_0	806.8757728
RNC1_4_20_0	724.4845744
RNC1_4_20_1	768.6288336
RNC1_5_20_0	230.1892208
RNC1_5_20_1	242.8657568

How to diagnose this please? there is no hardware issue.

Thank you in advance,