@danoffline 

Hi,

The issue involves a network loop created when LAG is set up between an AX73 router and a TL-SG108E switch, then extended to a second TL-SG605E switch. The loop results in abnormal port indicator behaviour. Solutions include ensuring consistent LAG settings across devices, checking for STP to prevent loops, and verifying configurations. 

@danoffline 

Can you provide a detailed network layout showing how the AX73, SG108E, and SG105E are connected? Based on your description, only after connecting the 2nd switch, which I assume is SG105E, does the SG108E indicate a network loop.

Where is the SG105E connected on the AX73? Please make sure it is not connected to the SG108E through another port.

The LAG settings on both the AX73 and SG108E are quite simple, so I assume there are no issues there with the settings. However, please check the Ethernet cabling to ensure everything is correctly connected to avoid a network loop.

BTW, neither the SG108E nor the SG105E supports STP.