Lan Collisions in NRM in RED

After I fresh installed OES2 Linux, found in Remote Manager-Health
Monitor-Lan Collsions in RED (The amount is less than the threshold
critical value. For this release, the thresholds are not configurable).
Here is the what it display :
Current : 0
Peak : 0
Max : N/A

Network seems work fine. But, Health Monitor always show in RED.

Any idea ?