I need to know how I can get a complete arp table (including interfaces that are not assigned a vlan) if I have a laptop plugged into a port that has no vlan. Right now only mac addresses to ports with an assigned vlan are showing up.To me that is a huge security risk. Can anyone help? Thanks 🙂
If the switch is in L2 mode then without vlan assignment you might not see the mac address in the ethernet switching table. Even if you receive any traffic on that port it will be discarded and the switch will not learn the mac address of the device. So it should not be a security issue as even to enable the mac-security you would need the mac to be learned first.
If the switch in in L3 mode then you should see the entry of the laptop ip in the arp table. But for that you need the irb L3 interface configured on the switch.
with >show arp no-resolve , you should be able to see the complete arp table, if switch is handling L3 traffic, i think in Solarwinds, you can do the same, however you need specific OID value to retrieve that data.
Hope this helps!
Please mark my solution as accepted if it helped, Kudos are appreciated as well.