Hello,
We need to first check Blade network/NIC status in the enclosure in the Onboard Administrator Console (OA).
In OA Console under Port Mapping>> Please check status of NIC ports.
What is the Switch model used and installed in enclosure? If switch has management console, are network settings configured in same subnet as enclosure or in a different subnet?
What is the NIC adapter installed in blade ? Is it Embedded/Onboard NIC or Mezzanine adapter connected to switch?
Are the latest NIC driver and NIC Firmware installed ?
What is the status of NIC ports in BIOS/RBSU of blade server and in ESXi OS are all NIC ports shown up?
If only one blade is having issue in communication to Switch, then troubleshooting needs to be done on blade end.. Move the server to different bay and check.
If issue follows the bay then we need to check from enclosure /midplane end OR if server issue, then we need to capture server OS logs, (Vmsupport logs from ESXi OS) , OA show all report and logs from switch to investigate further.
For investigation please log a support case with HPE further if issue still seen.
Regards,
HPE Employee.