VM isolated

igurvich

New Member
Sep 18, 2017
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I've installed a Ubuntu 16.04 server vm on a node in my cluster but for some reason it's isolated from everyone and I can't ping it even from the node it's located on. when I run tcpdump it shows that the ARP request for the host is looping and can't find it.
Node IP: 172.16.17.120
VM IP 172.16.17.148

ip addr
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/etc/network/interfaces
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VM network interface config
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Also when I start running the vm I receive an error message saying "failed to run vncproxy" , but the machine starts fine. Is there a connection?

EDIT: I'm still trying to troubleshoot and created another VM inside the same node and these two can ping each other. Trying to tcpdump on the interface on the node where the vm is located i see no traffic from these nodes despite them being bridged to this interface.
 
Last edited:
how does your host network config look like ?
 
how does your host network config look like ?

I've made a few changes but here is the topology of the network I've built:
Drawing1.jpg

the 192.168.17.0/24 is a host only network and the 172.16.17.0/24 is NAT.

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The VMware machine config of the host

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ip link output

Capture3.PNG Capture4.PNG
/etc/network/interfaces

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from the web portal

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ip route output
 
but you gave the vm an ip in the 172.x.x.x range not 192.x.x.x (so not like in your picture)?
also why the pointtopoint entry in the vm network config ?
 
So after rebuilding my entire network and playing around with options I've changed the interface model from virtIO to realtech. Seems to have fixed the issue.
 

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