I see a Sonicwall not getting the netmask from ROS.
Doing a packet dump I see the sonicwall sends a request for netmask but it does get only ip, dns and gateway but
no netmask. Netmask is set to “24”.
So the Sonicwall ARPs for every IP it tries to reach.
EDIT: My fault. Set Netmask but forgot the /24 behind the Network address.