VMware Cloud Community
Tom_CS
Contributor
Contributor

Unstable connection

Hello VMCommunity!

I have a cluster, then several hosts within, and a resource pool within each host.

I have one server in a windows environment with an unstable connection (server 2012).

I am running VMWare vCenter Server 5.0 and vSphere Client 5.0

I have a host with no VM's running in there, so I created a new server on there.

I copied the settings from existing servers which are working fine.

However it's causing me an issue because it's quite frequent that the connection drops and it is random as to what connections drop and for how long. So it can be fine for 10 minutes and it drops 1 packet, then the connection drops and it times out for two minutes..

I am running pings from two machines which should hopefully give a bit more information

I double checked because it started to sound like an IP address conflict, but that wasn't the issue..

Scenario A:

Machine 1 (machine with the issue)

ping to the VM host is timing out

ping to external DNS server is timing out

ping to local gateway is timing out

ping to loop back address works fine (127.0.0.1)

Machine 2

ping to Machine 1 is timing out

ping to external DNS is fine

ping to local gateway is fine

ping to host where Machine 1 resides works fine

Scenario B:

Machine 1 (machine with the issue)

ping to VMhost is timing out

ping to external DNS server is working fine

ping to local gateway is working fine

ping to loop back address works fine

Machine 2

ping to Machine 1 works fine

ping to external DNS is fine

ping to local gateway is fine

ping to host where machine 1 resides works fine

Any ideas would be appreciated !

0 Kudos
1 Reply
virtualosa
Contributor
Contributor

I have a few questions that might help everyone trying to help you.

1. Do you have any other VMs running on that same host that function properly? Pinging everything successfully?

2. If you vmotion that VM to another host, do you experience the same exact issue?

3. Have you tried changing the IP address just to see if it helps?

4. Are you pinging IPs or DNS names?

5. Do you have standard or distributed vswitches?

0 Kudos