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On 04/06/2018 01:28 PM, s serge wrote:
> Hello,
> 
> I'm evaluating an installation and everything from networking side was looking good
> until I tried to reach a VM host via private network from another VM via ssh.
> 
> In short:
> 1. Spawn a VM
> 2. Associate a floating IP
> 3. Logon to VM via ssh on public network
> 4. Spawn another VM
> 5. Try to reach 1st VM via ssh private network IP - FAIL.
> 6. ICMP to 1st VM IP via private network works well.
> 
> Looks pretty weird for me as according to logs everything looks fine,
> both VM got assigned a private IP and fetches metadata info.
> 
> Some notes about setup:
> Separate interfaces for management, private(VXLAN) and external network.
> Dozen of similar servers.
> 
> I'll continue to debug the issue, but appreciate any relevant feedback.

I would check two things:

1. Security groups are allowing port 22
2. MTU is set correctly, should probably be 1450 if you're using VXLAN, 
which should have been set via the DHCP reply

-Brian