Take the 2-minute tour ×
Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

On my ESXi 3.5 servers, I occasionally see a problem where - on newly started VMs - I see no traffic at all on their virtual network interfaces. I have to go into the VM settings and remove, then re-add the network interfaces before I see any traffic.

Has anyone seen this before? Is it possible I need to configure my physical switches (Cisco) differently to support this?

I'm using portgroups to present VLAN traffic to VMs - I've seen this happen on both trunked and untrunked ports, if that matters.

share|improve this question

2 Answers 2

I have seen this before.

When I edit the settings and click on the network adapter, the Connect at power on is checked but not the Connected. So far all I needed to do was to check the Connected box and the interface will come up.

I have not seen this on ESXi 4 yet, but will keep an eye out. Maybe it is related to the adapter type.

share|improve this answer
    
I'll check these settings next time I see the problem. Good to hear it may be ok in ESXi4 though. –  Jon Topper Jul 21 '09 at 15:14

Here's a theory.

You have VMotion enabled and the machine migrated to a host where the network that it was linked to do not exist.

When you now remove and add a network adapter, it picks up "VM Network" which works.

share|improve this answer
    
We're not using VMotion here. –  Jon Topper Jul 21 '09 at 15:13

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.