Go to Settings → System → DHCP server.
If the chosen network scenario uses the PBX as the DHCP server to assign IP addresses to devices, check that the options of the service are enabled with the correct settings:
DHCP server is integrated for auto provisioning of supported devices. It’s possible to enable the server for the initial configuration of the devices and successively disable it, otherwise to enable the parameter “Deny unknown clients”.
Parameters:
Enable DHCP server at boot time: enables internal DHCP server and allows you to select the interface on which the server is enabled (normally eth1)
must be more than / must be less than: range of IP addresses that can be assigned to hosts
Default lease time (mins): minimum time period for lease duration
Maximum leases: maximum number of leases that can be assigned
Domain name suffix: if the hosts are inserted in the network which is managed by the domain controller
Default gateway: IP address of the router or of the PBX (in case of LAN interface)
Primary / Secondary DNS server: addresses of DNS servers
Primary /Secondary NTP Server: addresses of NTP servers
Primary / Secondary WINS Server: addresses of WINS servers
Deny unknown clients: if enabled, IP addresses are not automatically assigned to unknown hosts
All the IP addresses which DHCP server has assigned to devices, appear in the “Leases” table below.
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