copy primary secondary # copies good running image to backup

: Filters multicast traffic so it does not flood all ports.

An alternative, often preferred method, is searching for the product via the HPE MyNetworking Portal .

Understanding how to manage and troubleshoot your JL381A is essential for any network administrator. This section consolidates key technical information.

: Legal "paper" regarding regulatory standards for the JL381A hardware.

| Issue | Likely Cause | Solution | |--------|--------------|----------| | Firmware upgrade fails | Insufficient flash space | Delete old images: delete <filename> | | Switch won’t boot after update | Corrupted image or wrong model | Boot from secondary: press Ctrl+B during boot → boot secondary | | TFTP timeout | Firewall or VLAN mismatch | Use USB or SCP instead | | “Invalid image format” | Downloaded wrong architecture | Ensure file ends in .swi and is for 3810M (not 2930F) |

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Many Bluetooth speakers (e.g., some W-KING, Doss, or Anker soundbars) use the JL381A. Over-the-air firmware updates via a mobile app are convenient but risky. If power is interrupted during the write cycle, the external flash gets partial data. The device becomes a paperweight.