why cannot persist the session in multipath(outgoing at NAT)
 

~# ip route add defalut equalize nexthop via 211.xxx.xxx.10 dev eth1 weight 10 nexthop via 211.xxx.xxx.10 dev eth2 weight 10

default equalize
nexthop via 211.xxx.xxx.10 dev eth1 weight 10
nexthop via 211.xxx.xxx.10 dev eth2 weight 10

nat set
pkts bytes target prot opt in out source destination
218K 14M SNAT all -- * eth1 0.0.0.0/0 0.0.0.0/0 to:211.xxx.xxx.251
862K 57M SNAT all -- * eth2 0.0.0.0/0 0.0.0.0/0 to:211.xxx.xxx.252

--> setting ok!
--> but sometimes, outgoing session broken
--> I need session persistence
--> please, What should I do!