View the LLDP config of your switch.
lldp admin-status
The following command disables HP’s Link Layer Discovery Protocol ( LLDP ) on a specific port list.
Example:
lldp admin-status 4 disable
With LLDP enabled the switch periodically broadcasts info about your device, including the hostname and management address. You would likely want to disable this on any ports facing hosts on the other end, like your WAN interface, that do not need to hear this traffic.
Thanks to Packet Pushers