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HACMP 网络测试疑问？

环境为AIX 6100-06-03-1048,HACMP 6.1 SP17
两个节点搭建的HACMP测试环境，每个节点上两个网卡，
hosts文件如下
10.10.10.181 LPAR1_boot LPAR1
10.10.10.182 LPAR2_boot LPAR2
10.7.7.181 LPAR1_standby LPAR1
10.7.7.182 LPAR2_standby LPAR2
10.7.2.181 LPAR1_per
10.7.2.182 LPAR2_per
10.7.2.180 oradb
LPAR1上网卡信息如下:

ifconfig -a|more

en0: flags=1e084863,c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),LARGESEND,CH
AIN>

    inet 10.10.10.181 netmask 0xffffff00 broadcast 10.10.10.255
    inet 10.7.2.181 netmask 0xffffff00 broadcast 10.7.2.255
     tcp_sendspace 131072 tcp_recvspace 65536 rfc1323 0

en1: flags=1e084863,c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),LARGESEND,CH
AIN>

    inet 10.7.7.181 netmask 0xffffff00 broadcast 10.7.7.255
    inet 10.7.2.180 netmask 0xffffff00 broadcast 10.7.2.255
     tcp_sendspace 131072 tcp_recvspace 65536 rfc1323 0

lo0: flags=e08084b,c0<UP,BROADCAST,LOOPBACK,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,LARGESEND,CHAIN>

    inet 127.0.0.1 netmask 0xff000000 broadcast 127.255.255.255
    inet6 ::1%1/0
     tcp_sendspace 131072 tcp_recvspace 131072 rfc1323 1

节点间切换和资源组切换测试都正常，唯一在进行网卡测试时发现一个现象：
运行ifconfig en1 down模拟en1网卡故障
可以看到

ifconfig -a|more

en0: flags=1e084863,c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),LARGESEND,CH
AIN>

    inet 10.10.10.181 netmask 0xffffff00 broadcast 10.10.10.255
    inet 10.7.2.181 netmask 0xffffff00 broadcast 10.7.2.255
    inet 10.7.2.180 netmask 0xffffff00 broadcast 10.7.2.255
     tcp_sendspace 131072 tcp_recvspace 65536 rfc1323 0

en1: flags=1e084862,c0<BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),LARGESEND,CHAIN

    inet 10.7.7.181 netmask 0xffffff00 broadcast 10.7.7.255
     tcp_sendspace 131072 tcp_recvspace 65536 rfc1323 0

lo0: flags=e08084b,c0<UP,BROADCAST,LOOPBACK,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,LARGESEND,CHAIN>

    inet 127.0.0.1 netmask 0xff000000 broadcast 127.255.255.255
    inet6 ::1%1/0
     tcp_sendspace 131072 tcp_rec

可以看到service ip切换到en0上，正常
但是这个时候，在不恢复en1的情况下，再ifconfig en0 down，模拟en0的故障：
这个时候发现两个节点都会自动关闭
由于这个环境是将一台小型机上创建两个LPAR搭建出来的，所以不清楚真实的环境，遇到en1，en0都故障时，也会发生这种情况吗？有点不明白，为什么会自动关机呢？

在网上看到有一位外国人说了这么一段话(地址：https://www.experts-exchange.com/questions/26763773/how-to-bring-NIC-down-on-aix-server.html)
Bringing down a service interface the above described way will force a resource group failover, and bringing down the heartbeat interfaces that way will trigger the Dead Man Switch, so the affected node will be halted immediately!
貌似是这个情况，但是又不太一样，按理说，这个时候我还有一个磁盘心跳是正常的，两节点之间能相互检测到状态啊，求大神解惑

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