I was getting alert on ping fail from monitoring system on and off for several hours, after several hours, everything goes back to normal.
I looked into the problem and found that there was unusual high delay (between 35 to 60ms) on one hop (Cisco switch to a Cisco router), both ports are set with 1GB bandwidth. Never seen this problem before. No configuration was changed during time.
I have checked the input and output error on the ports, there's no error. Traffic was normal during the time. the ports were not flapping up and down.
What would be some possible causes of this issue?
Please share your knowledge all.
Thank you so much!