WLANPI R4 does not show LLDP packets

[tstalzer]

Hello
I have the latest version of wlanpi installed in a Raspberry Pi 4.
Network is connected to Eth0 directly to a switch which sends out LLDP packets (confirmed with other tools).
However WLANPI does not show the LLDP neighbor.
Do you have any ideas / tips on how to show the information?
Thanks
--Thomas

[jiribrejcha]

Sorry to hear, Thomas. Let's fix that.

Can you please:

1. Connect your WLAN Pi to the switch via Ethernet
2. Wait for 60 seconds
3. SSH to your WLAN Pi and share these 2 files:

/tmp/lldpneightcpdump.cap
/tmp/lldpneigh.txt

4. Share output of this command:

date && cat /var/log/messages | grep "networkinfo script"

5. Share output of this command. It manually attempts to capture the LLDP frames coming from the switch into the WLAN Pi and display neighbour information in Shell.

sudo lldpneigh

Please review contents of the files before uploading. If you don't want to publicly share them here, feel free to e-mail me at [email protected].

[jiribrejcha]

I forgot to ask, what switch model is it?

If you have a packet capture of the LLDP frame sent by the switch (Wireshark on a laptop should do the trick), that would be perfect.

[tstalzer]

Hello Jiri
Thanks for getting back to me.
The answer was actually much simpler.
Somehow the script could not write into

/tmp/lldpneightcpdump.cap
/tmp/lldpneigh.txt

I deleted the files (needed root access - sudo -i) and then it was working. So just a rights thing.

Thanks for coming back to me.

--Thomas

[jiribrejcha]

Thanks for letting me know 👍🏻