rrentControlSet\Services\Tcpip\Parameters Name: PerformRouterDiscovery Type: REG_DWORDValue: 0 recommended Value: 1 enabled Value: 2 enable only if DHCP sends the router discover option EnableICMPRedirects : parameter controls whether Windows 2000 will alter its route table in response to ICMP redirect messages that are sent to it by network devices such as a routers.