We have a issue of disabling ip redirect/ip proxy-arp.
As a security measure, as soon as we disabe the ip redirect/ip proxy-arp some of the devices lost connection.
Case 1: A router fa0/0 connected to a switch fa 0/24. The switch is a layer 2 device with wrong default-gateway configured. It lost connectivity when the ip proxy-arp is removed from the router fa0/0 interface.
In other scenario, the ip devices (Servers etc.) with wrong default-gateway lost connection when ip redirect is removed. (or ip proxy-arp is removed, not sure, because both are removed)
How these can be confirmed?
How long the ip redirect cache is kept? What tests we can do to confirm?