Packets are forwarded to the IPv4 address specified, without modifying the IP header (except the TTL is decremented and the IP checksum is updated). The IPv4 address must be in the IP ARP cache, otherwise the packet is forwarded normally. Only fast path traffic can be redirected. This capability can be used to implement Policy-Based Routing.
You may want to create a static ARP entry for the redirection IP address, so that there will always be a cache entry. See Policy-Based Routing for more information.