No Downlink neighbor displayed on port

No Downlink neighbor displayed on port

No Downlink neighbor displayed on port
No Downlink neighbor displayed on port
Yesterday - last edited 11 hours ago
Model: OC300  
Hardware Version: V1
Firmware Version: 1.28.2 Build 20250110 Rel.74960

Hi,

 

When I hoover with the mouse over a port on a switch (SG3428, SG2428P, ...) I can see different info sets that change time over time.

big

There is this big balloon with IDs and this small without. This can change on the very same device after a minute. When it's big on one switch, it's small on the other.

I also really miss the Downlink device's name in the last pics. LLDP is enabled, ofc, on all devices.

All of this is pretty strange but the most important would be to get the neighbors, always.

Is it true the LLDP should still run on an STP blocked port?

 

Any idea?

 

BR,

Peter

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1 Accepted Solution
Re:No Downlink neighbor displayed on port-Solution
11 hours ago - last edited 11 hours ago

Hi  @Czega 

 

The differences in port information display could be due to firmware versions, device load, or changes in network topology. Sometimes, switches dynamically adjust the displayed information based on the current network state.  

Ensure that all switches are running the latest firmware version. You can check the firmware version through the device management interface and update to the latest version available on the TP-Link official website.

 

LLDP packets are sent at the data link layer and should theoretically work on STP blocked ports. However, since STP’s primary function is to prevent loops, it may block the transmission of LLDP packets. Therefore, LLDP information might not be displayed on STP blocked ports.

 

Suggestions: If you need complete LLDP information in an STP environment, consider optimizing your network topology to reduce unnecessary port blocking.

Wish you a happy life and smooth network usage! 
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Re:No Downlink neighbor displayed on port-Solution
11 hours ago - last edited 11 hours ago

Hi  @Czega 

 

The differences in port information display could be due to firmware versions, device load, or changes in network topology. Sometimes, switches dynamically adjust the displayed information based on the current network state.  

Ensure that all switches are running the latest firmware version. You can check the firmware version through the device management interface and update to the latest version available on the TP-Link official website.

 

LLDP packets are sent at the data link layer and should theoretically work on STP blocked ports. However, since STP’s primary function is to prevent loops, it may block the transmission of LLDP packets. Therefore, LLDP information might not be displayed on STP blocked ports.

 

Suggestions: If you need complete LLDP information in an STP environment, consider optimizing your network topology to reduce unnecessary port blocking.

Wish you a happy life and smooth network usage! 
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