Have X480 as border.
Yesterday begin big bcast flood in local network.
Investigate show that it was scanning for local net from Internet, so IP addresses which wasn't in IP-ARP table was asked by X480 - ARP who is xx.xx.xx.xx in local. As there big local network, and a lot of IP-addresses wasn't active - X480 made big bcast flood.
As workaroung we can
- increase time of keeping arp in table
Any more ideas?
I receive advice - to make arp-passive mode (X480 transmit bcast arp query only when client from local net give arp query) - how I can configure this?