A little background of my private ‘cloud’ ;-) setup :
vCenter 5.1, ESXi 5.1 Update 1 hosts in a cluster setup, HA, DRS and vMotion are all enabled.
For some host maintenance activity, I was trying to migrate live VMs from ESXi host A to ESXi host B. When I initiated the migration process from the wizard, I did see an error message and I couldn’t continue…
Here’s the error message:
Currently connected network interface ‘Network adapter 1′ uses network ‘VM Network’, which is configured for different offload or security policies on the destination host other than on the source host.
A quick search on google resulted in following KB article from VMware
Troubleshooting Migration compatibility error: Currently connected network interface uses network, which is configured for different offload or security policies (1003834)
In the aforementioned article, it was suggested to review the settings in the Security tab and the Traffic Shaping tab between the hosts.
I did compare Traffic Shaping configurations between the hosts in question however, all the settings were identical.
Since, I couldn’t find anything handy to fix this issue, I started looking into the other network settings.
After scratching my head for few minutes, I remembered that (Eureka !!!) , on the destination host, I had enabled Promiscuous Mode on VM Network Properties.
I disabled Promiscuous Mode on the destination host and I could migrate the VMs without issues !
Inference : If you come across such an error detailed in this article, make sure to look into all network configurations on source and destination ESXi hosts and their configurations are identical to each other.
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