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Cisco switch connect to TP-Link with L2 loop

Ha Dao
Beginner
Beginner

Dear expert guys

 

I m trying to setup my LAN with simple topology:

 

1. Loop1 : Everything is working well. TP-Link detect it's loopback then block 2 ports, nothing happen with Cisco sw

loop1.PNG

2 Loop2: 

loop2.PNG

 

TP Link SG3424 can detect loopback then block (block and auto recovery after every 90s) port connect to TP Link 8 ports.

But the interface vlan on Cisco switch is flapping every time TP-Link recovery block port.

Cisco sw only show log interface vlan up / down, nothing more

 

 

 

 

 

 

1 Reply 1

Ha Dao
Beginner
Beginner

Anyone can give advise how to improve Loop2 topology ? 

Why interface vlan on Cisco switch up / down

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