This has been discussed before, but i did not manage to find a solid solution .
Thing is that i just joined a company, and while some interfaces across various switches show as "up/up" (connected) the MAC address table is not learning anything there.
Unfortunately I have no idea what is connected on those ports, so i tried the following:
- Pinging from the switch the broadcast IP of the VLAN in which those ports belong
- DNS request to the broadcast IP of that vlan
- shut / no shut the port, in case this triggers the end device to send any traffic (gratuitous arp, dhcp discover, whatever)
Still unable to learn the MAC somehow.
Any ideas?
Thank you in advance,
George
