Cannot get "NODE LIST" feature working

[papperone]

Hi, as I'm having now several ESP8266 with ESPEasy I though to enable the Node List function.
Basically in the advanced settings I added the same UDP port to all modules and I enabled the "Global Synch" checkbox.
Now each module can list itself in the "Main Page" (before the list was empty) but only that and none of the other ones in my network.
it looks like this fatures does not work for me, can you please help to understand where the issue is coming from?

[Martinus]

globalsync is not needed. But each ESP needs a reboot after selecting a non-zero UDP port, before it will start to listen for UDP messages.

[papperone]

Indeed, rebooting all units now makes the feature working, thanks!!!

Just one more question, what is the column "age" reporting? for sure it's not uptime (as I supposed it was) as today my units reports either 1 o 0 in this column.
Can you explain what is this value meaning?

[Martinus]

Age is a counter to maintain the active node list. It expects a UDP system message each 30 seconds.
If more than 10 messages are missed , the remote Node will be wiped from the list to prevent traffic to dead nodes.

[papperone]

Age is a counter to maintain the active node list. It expects a UDP system message each 30 seconds.
If more than 10 messages are missed , the remote Node will be wiped from the list to prevent traffic to dead nodes.

Thanks for the clear explanation