Panasonic PN28080K-ID Operation Manual page 20

Note: Unless you configure these settings, you cannot use the SNMP management
functions and remotely connect to the switch via Telnet or SSH. Be sure to
configure them. If you are unsure, consult the network administrator. All IP
addresses on the local network must be unique, and no duplications are
allowed. In addition, you need to set the subnet mask and the default gate-
way, which are the same for other devices on the same subnet using this
switch.
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