why cdp neighbor looks like abnormal?

[interfacedy]

Hello, Switch100 is two 9300 stack, and SW10 and SW20 single switch 9300. Three switches connect each other with two cables. show cdp neighbor shows the connection like below, which looks like unreasonable. Did I miss some something in these checks? Anyone can explain it?  

[Sergiu.Daniluk]

Can you share the "show cdp neigh details" from all switches?

Cheers,

Sergiu

[interfacedy]

Thanks for your reply. Something was wrong with the diagram. Now i updated it. All three switches are in same subnet. Can you take at it again?

[Sergiu.Daniluk]

Can you share the "show cdp neigh details" from all switches?

[interfacedy]

its production network. It would be much better if i can share specific info here. 

[Sergiu.Daniluk]

Hi @weijun.duan 

If you change the SN numbers and device names with something else, it should be fine. But make sure you are consistent in the change.

Cheers,

Sergiu

[weijun.duan]

show cdp nei