Hi,

There is nothing that stands out as an issue with the setup. Are you using spanning-tree? There seem to be plenty of places for loops to occur. Is the packet loss on any specific switch or randomly on all of them?

Hi,

How do i check whether is running on spanning tree? if not what is the cause? The packet loss always on core 1 (172.16.0.50). Sometimes device show offline but i still able to access using another set of IP  which is (10.8.x.x)

Thanks

Hi,

I have check all the switches setting eventually is turn on. Please find below screenshot

What firmware version is that switch on? Try show spanning-tree active and see which ports are being blocked.

Hi,

All switches firmware is 3.3.3.3. Below is the STP Port Table

Port 25 1/xg3, STP=enable, STP Root Guard=disable, State=Discarding, Role=Alternate

What does it mean state is discarding? Being block?

Discarding is when spanning-tree is blocking because there is a loop. Which port is 172.16.0.50 connected to?

Hi,

There is a switch (172.16.0.55) connect to 172.16.0.50 port 25 1/xg3

Thanks

It looks like it is in forwarding mode like it should be. Does the issue occur all of the time or just randomly?

Hi,

We are having this issue when many users are connecting to network and we have use spiceworks for monitoring, it always show "The Network is consistently overloaded"

If you do show process cpu and show memory cpu when the issue is occurring what does it show? It is possible that your traffic is overloading what the switch is capable of transmitting.

The root port is the port with the shortest path to the root switch for STP.