The DHCP Parameters window displays the following parameters:
Server Enable — Enable (default) or Disable the DHCP server. If enabled, the device does not relay DHCP requests, unless the request is from device router. If disabled, the device relays DHCP requests to the DHCP server configured in this window.
Next Server Address — The DHCP server IP address. The device acts as a DHCP relay if this parameter is not equal to 0.0.0.0.
Relay Security Threshold — DHCP requests are relayed only if their SEC field is greater or equal to the threshold value, in order to allow local DHCP servers to answer first.
DNS IP address — This parameter is the DNS server IP address. It is given here to enable consistent updates for DHCP client names.
Probe Enable — Enable (by default) or Disable the automatic ICMP echo requests probe of an address before reallocation. The probe is to verify that the address is currently not in use by a client.
Probe Retries — Indicates the amount of time (in seconds) the DHCP probes before determining that the address is available for allocation.
Probe Timeout — Indicates the amount of time (in seconds) that the server waits before issuing a new probe or determining that an IP address is available for allocation..
Primary WINS Server — The primary WINS server IP address.
Secondary WINS Server — The backup WINS server IP address.
Node Type — The NetBios type defines how resources are identified and accessed. There are four options:
Broadcast — Uses broadcast to resolve names. Default when WINS servers are not in place
Point-to-Point — Uses point-to-point communications with WINS servers to resolve names.
Mixed — First uses broadcast type, then if routers must be crossed, point-to-point is used.
Hybrid — First uses point-to-point for name queries. If this fails (i.e., the WINS server fails), broadcast is used to resolve names until the hybrid polling feature learns that the WINS server is functioning again.