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No Downlink neighbor displayed on port

No Downlink neighbor displayed on port

No Downlink neighbor displayed on port
No Downlink neighbor displayed on port
2025-01-21 09:10:44 - last edited 2025-01-22 08:37:02
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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Re:No Downlink neighbor displayed on port-Solution
2025-01-22 08:36:59 - last edited 2025-01-22 08:37:02

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!  >Get the Latest Omada SDN Controller Releases Here< >Experience the Latest Omada EAP Firmware<
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Re:No Downlink neighbor displayed on port-Solution
2025-01-22 08:36:59 - last edited 2025-01-22 08:37:02

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!  >Get the Latest Omada SDN Controller Releases Here< >Experience the Latest Omada EAP Firmware<
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