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Fatal interface error INS-40925 on 18c grid install

User_B5PERDec 10 2021

Hello all, I'm trying to load AIX 7.2 with oracle rac 18c via response file and silent installer for a software compatibility test.
On the grid install I get this nebulous error INS-40925. I have a very simple 2 node IPv4 setup and believe I have all the necessary public and private interfaces set up as needed. In the grid install log, I don't see any specific error .... it goes along just fine then abruptly ends with this error. All the addresses can ping their respective subnet neighbors and passwordless SSH should be working fine between all accounts and all IP's. In my case the public interfaces are en0 and private interfaces are en1
Any advice appreciated. Error is below, and below that is the ifconfig output from both nodes:
[FATAL] [INS-40925] One or more nodes have interfaces not configured with a subnet that is common across all cluster nodes.
CAUSE: One or more nodes have network interfaces configured with a subnet that is not common to all nodes in the cluster.
ACTION: Ensure all cluster nodes have a public interface that is defined with the same subnet, and accessible by all nodes in the cluster.

host1# ifconfig -a
en0: flags=1e084863,814c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),LARGESEND,CHAIN>
inet 5.10.62.102 netmask 0xfffffe00 broadcast 5.10.63.255
tcp_sendspace 262144 tcp_recvspace 262144 rfc1323 1
en1: flags=1e084863,814c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),LARGESEND,CHAIN>
inet 6.10.34.121 netmask 0xffffe000 broadcast 6.10.63.255
tcp_sendspace 262144 tcp_recvspace 262144 rfc1323 1
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
tcp_sendspace 131072 tcp_recvspace 131072 rfc1323 1

host2# ifconfig -a
en0: flags=1e084863,814c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),LARGESEND,CHAIN>
inet 5.10.62.112 netmask 0xfffffe00 broadcast 5.10.63.255
tcp_sendspace 262144 tcp_recvspace 262144 rfc1323 1
en1: flags=1e084863,814c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),LARGESEND,CHAIN>
inet 6.10.34.122 netmask 0xffffe000 broadcast 6.10.63.255
tcp_sendspace 262144 tcp_recvspace 262144 rfc1323 1
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
tcp_sendspace 131072 tcp_recvspace 131072 rfc1323 1

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Added on Dec 10 2021
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