Determines whether a packet arriving on a non forwarding interface can be accepted for an IP address that is not explicitly configured on that interface. If ip_forwarding is enabled, or xxx:ip_forwarding for the appropriate interfaces is enabled, then this parameter is ignored, because the packet is actually forwarded.
Refer to RFC 1122, 188.8.131.52.
0 (loose multihoming)
0 = Off (loose multihoming)
1 = On (strict multihoming)
If a machine has interfaces that cross strict networking domains (for example, a firewall or a VPN node), set this parameter to 1.