Proxy ARP
By default ARP cache timeout for PC=10 Minutes
By default ARP cache timeout for Router=4 Hours
ARP is a BROADCAST
ROUTER DROPS all BROADCAST request.
if we ping to a different network always it will reach-out to its default gateway.
NO matter if proxy arp is enabled or disabled.
PROXY arp:
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ENABLED===>PROXY ARP
PC will think 10.1.11.1 is in same subnet and wil send a Broadcast packet to Router
Router Will now do a PROXY
DISABLED==>PROXY ARP
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