I did this command to prevent arp spoofing:
arp -i vlan2 -s 10.0.0.1 00:11:22:33:44:55
where 10.0.0.1 is my ISP gateway (it is public IP, 10.0.0.1 as an example)
Inernet connection worked just fine and then one day my ISP put new hardware on his side and MAC address changed.
Gateway IP stayed the same.
After hardware change I noticed I can receive occasionally ping replies from gateway
Not for every ping request but for some ping reply was comming thru.
DNS replies where not comming thru.
Is this a bug that i was able to receive sometimes ping replies from ISP gateway ??