#unconditional
NET_IPV4_ROUTE_FLUSH
NET_IPV4_ROUTE_MIN_DELAY
NET_IPV4_ROUTE_MAX_DELAY
NET_IPV4_ROUTE_GC_THRESH
NET_IPV4_ROUTE_MAX_SIZE
NET_IPV4_ROUTE_GC_MIN_INTERVAL
NET_IPV4_ROUTE_GC_TIMEOUT
NET_IPV4_ROUTE_GC_INTERVAL
NET_IPV4_ROUTE_REDIRECT_LOAD
NET_IPV4_ROUTE_REDIRECT_NUMBER
NET_IPV4_ROUTE_REDIRECT_SILENCE
NET_IPV4_ROUTE_ERROR_COST
NET_IPV4_ROUTE_ERROR_BURST
NET_IPV4_ROUTE_GC_ELASTICITY
NET_IPV4_ROUTE_MTU_EXPIRES
NET_IPV4_ROUTE_MIN_PMTU
NET_IPV4_ROUTE_MIN_ADVMSS
NET_IPV4_ROUTE_SECRET_INTERVAL
#conditional
NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS