@nikade Yes, that's all I did. Changed from one subnet to a different one on the other NIC. There were no other IPs configured on the host.
It was actually 2 hosts (2 different pools) that I did the same thing on. Both just swapped NICs and they stopped working.

@nikade Yeah, this was a standalone host. It had an IP which was working. The only thing I did was change the mgmt interface from eth3 to eth2, both 10G Fiber, and it stopped backing up and stopped giving me stats. I tried rebooting, restarting toolstacks, etc with no luck.

@nikade That's what it took... restoring the management interface to the original
Backups work now, stats now work as well. Thank you

I moved my "Management" network from eth3 to eth2 and now backups (other than pool metadata and xo config) always fail with the message:
Error: unexpect statusCode 302

This is an NFS share and a Backblaze location
eth2 get's an ip via dhcp, is connected, I can ping the storage locations from the host.
eth2 is no vlan (port is assigned the 101 vlan) while eth3 was using vlan 101 (and still is but doesn't get an IP).

On another xo instance I tried the same NFS device and get 2 errors:
vm.stats
{
"id": "ebd05878-91c1-fa25-3efa-462933bb1d9f"
}
{
"code": "ECONNREFUSED",
"message": "",
"name": "AggregateError",
"stack": "AggregateError:
at internalConnectMultiple (node:net:1122:18)
at afterConnectMultiple (node:net:1689:7)
at TCPConnectWrap.callbackTrampoline (node:internal/async_hooks:130:17)"
}

backupNg.runJob
{
"id": "d54f5c0a-c2f2-4471-8abf-f6f3be1xxxe5",
"schedule": "377ef2c8-81e7-4ddf-9c64-452xxxad4b38"
}
{
"code": "ECONNREFUSED",
"call": {
"duration": 37,
"method": "session.login_with_password",
"params": "* obfuscated *"
}
}

Am I missing something obvious?