M9008 + M9010 + 连通性问题

如下图： 在A和B分别为M9010 和 M9008  ，在B上去ping 公网IP地址 219.233.237.2 地址， 在A上开起  debug ip packet  和  debug aspf packet 看到的debug消息；

                1. 根据消息可以分析到，ping包在A设备上面由于无效的状态被丢掉了，请问一下 ，我这个ping包既然能穿过A设备，那么A设备上面不应该就存在这条回话的状态，然后回报回会根据此状态自动放行吗？会什么丢掉？

                备注： 上述情况是在，A设备上面把Untrust 到 Trust   以及  Trust 到Untrust的 域间策略改成了放行所有数据包的情况下测试的；

*Sep 13 13:48:28:787 2018 NAT-M9000_2 IPFW/7/IPFW_PACKET: Receiving, interface = M-GigabitEthernet0/0/0 version = 4, headlen = 20, tos = 0 pktlen = 84, pktid = 15492, offset = 0, ttl = 255, protocol = 1 checksum = 44153, s = 10.100.255.90, d = 219.233.237.2 channelID = 0, vpn-InstanceIn = 0, vpn-InstanceOut = 0. prompt: Receiving IP packet from interface M-GigabitEthernet0/0/0. Payload: ICMP type = 8, code = 0, checksum = 0xf284. 

 *Sep 13 13:48:28:787 2018 NAT-M9000_2 IPFW/7/IPFW_PACKET: Sending, interface = Route-Aggregation70 version = 4, headlen = 20, tos = 0 pktlen = 84, pktid = 15492, offset = 0, ttl = 254, protocol = 1 checksum = 44409, s = 10.100.255.90, d = 219.233.237.2 channelID = 0, vpn-InstanceIn = 0, vpn-InstanceOut = 0. prompt: Sending IP packet received from interface M-GigabitEthernet0/0/0 at interface Route-Aggregation70. Payload: ICMP type = 8, code = 0, checksum = 0xf284. 

 *Sep 13 13:48:28:918 2018 NAT-M9000_2 IPFW/7/IPFW_PACKET: -Slot=1.1; Receiving, interface = Route-Aggregation70 version = 4, headlen = 20, tos = 0 pktlen = 84, pktid = 15492, offset = 0, ttl = 252, protocol = 1 checksum = 44921, s = 219.233.237.2, d = 10.100.255.90 channelID = 0, vpn-InstanceIn = 0, vpn-InstanceOut = 0. prompt: Receiving IP packet from interface Route-Aggregation70. Payload: ICMP type = 0, code = 0, checksum = 0xfa84.

 *Sep 13 13:48:28:918 2018 NAT-M9000_2 IPFW/7/IPFW_PACKET: -Slot=1.1; Transferring, interface = M-GigabitEthernet0/0/0 version = 4, headlen = 20, tos = 0 pktlen = 84, pktid = 15492, offset = 0, ttl = 251, protocol = 1 checksum = 45177, s = 219.233.237.2, d = 10.100.255.90 channelID = 0, vpn-InstanceIn = 0, vpn-InstanceOut = 0. prompt: Sending to slot 4 Payload: ICMP type = 0, code = 0, checksum = 0xfa84. 

 *Sep 13 13:48:28:918 2018 NAT-M9000_2 ASPF/7/PACKET: -Slot=1.1; The first packet was dropped by ASPF for invalid status. Src-ZOne=Untrust, Dst-ZOne=Trust;If-In=Route-Aggregation70(6996), If-Out=M-GigabitEthernet0/0/0(6985); Packet Info:Src-IP=219.233.237.2, Dst-IP=10.100.255.90, VPN-Instance=none,Src-Port=55714, Dst-Port=0. Protocol=ICMP(1).