The following issues occur when HP Virtual Connect Flex-10 is used with VMware ESX and ESXi 3.5 Update 3:
Enable Beacon probing in the vSwitch or port group that has multiple Flex-NICs teamed. Ensure that SmartLink is turned on and Ethernet Connection Mode to disable failover is configured.
Note: VirtualConnect will be enhanced by HP in a future firmware update. This will allow you to turn on SmartLink and configure Ethernet Connection Mode to disable failover without using Beacon probing.
4. To prevent this issue from occurring, avoid any of the listed configuration conditions.
Based on VMware KB1007982