vCenter cannot connect ESX

[CcFroG]

I'm using ESXi 6.5.

vCenter *1

ESXi *2

I have connected two ESXi in vCenter.  I restarted ESXi-1 last week. After that the vCenter cannot connect the ESXi-1.

vCenter IP address 138.14.0.9

ESXi-1 IP: 10.10.254.35

ESXi-2 IP: 10.10.254.34

ESXi-2 is worked. But ESXi-1 not responding.

This is the error message. By the way, I tried to use Veritas Backup Exec to conncet ESXi-1. But it showed "cannot connect to the ESXi"

I can login to 10.10.254.35 directly.

[Question]

How to fix this problem?

[MikeStoica]

Did you tried to restart the Management agents in ESXi?

You can do that from the ESXi console or log in to ESXi with ssh and do:

/etc/init.d/hostd restart

/etc/init.d/vpxa restart

[CcFroG]

I followed your procedure. But the result was the same.

[EricChigoz]

Hello CcfroG,

Good morning.

I think you might be having a network connection problem.

lets try this:

1. ssh to 138.14.0.9 and confirm you can ping 10.10.254.35
2. confirm you have entries on vcenter hosts file for your ESXI hosts
3. ssh to 10.10.254.35 and confirm you can ping 138,14.0.9
4. If you confirm connectivity exists between the two, you may need to disconnect the host from vCenter and add it back.

Thank you.

[CcFroG]

Hello EricChigoz

1. I can ssh to 138.14.0.9 and 10.10.254.35

2. vCenter and ESXi-1 are using the same DNS. So they can explain each other

3. The network didn't have any problem. vCenter can connect to 10.10.254.34 . And ping test showed me there's no problem.

4. I have tried disconnect and add it again. But it seems not work.

[EricChigoz]

Please confirm if this is production or test?

if you have restarted the host and management agents and still  no head way maybe you  would need to restart the hosts completely and lets see what happens  when it comes up.

/etc/init.d/hostd restart

/etc/init.d/vpxa restart

[CcFroG]

I will restart it tonight. Reply you later.

This is production. But I use to test.