Chapter 9 Interfaces
NXC Series User’s Guide
154
DHCP Select what type of DHCP service the NXC provides to the network. Choices are:
None - the NXC does not provide any DHCP services. There is already a DHCP server on the
network.
DHCP Relay - the NXC routes DHCP requests to one or more DHCP servers you specify. The
DHCP server(s) may be on another network.
DHCP Server - the NXC assigns IP addresses and provides subnet mask, gateway, and DNS
server information to the network. The NXC is the DHCP server for the network.
These fields appear if the NXC is a DHCP Relay.
Relay Server 1 Enter the IP address of a DHCP server for the network.
Relay Server 2 This field is optional. Enter the IP address of another DHCP server for the network.
These fields appear if the NXC is a DHCP Server.
IP Pool Start
Address
Enter the IP address from which the NXC begins allocating IP addresses. If you want to
assign a static IP address to a specific computer, use the Static DHCP Table.
If this field is blank, the Pool Size must also be blank. In this case, the NXC can assign every IP
address allowed by the interface’s IP address and subnet mask, except for the first address
(network address), last address (broadcast address) and the interface’s IP address.
Pool Size Enter the number of IP addresses to allocate. This number must be at least one and is limited
by the interface’s Subnet Mask. For example, if the Subnet Mask is 255.255.255.0 and IP Pool
Start Address is 10.10.10.10, the NXC can allocate 10.10.10.10 to 10.10.10.254, or 245 IP
addresses.
If this field is blank, the IP Pool Start Address must also be blank. In this case, the NXC can
assign every IP address allowed by the interface’s IP address and subnet mask, except for
the first address (network address), last address (broadcast address) and the interface’s IP
address.
First DNS Server,
Second DNS
Server, Third DNS
Server
Specify the IP addresses up to three DNS servers for the DHCP clients to use. Use one of the
following ways to specify these IP addresses.
Custom Defined - enter a static IP address.
From ISP - select the DNS server that another interface received from its DHCP server.
EnterpriseWLAN - the DHCP clients use the IP address of this interface and the NXC works as
a DNS relay.
First WINS Server,
Second WINS
Server
Type the IP address of the WINS (Windows Internet Naming Service) server that you want to
send to the DHCP clients. The WINS server keeps a mapping table of the computer names
on your network and the IP addresses that they are currently using.
Default Router If you set this interface to DHCP Server, you can either select gex IP (where x is the interface
number) to use the interface’s IP address or use another IP address as the default router. This
default router will become the DHCP clients’ default gateway.
To use another IP address as the default router, select Custom Defined and enter the IP
address.
Lease time Specify how long each computer can use the information (especially the IP address)
before it has to request the information again. Choices are:
infinite - select this if IP addresses never expire.
days, hours, and
minutes - select this to enter how long IP addresses are valid.
Extended
Options
This table is available if you selected DHCP server.
Configure this table if you want to send more information to DHCP clients through DHCP
packets.
Add Click this to create an entry in this table. See Section 9.2.4 on page 157.
Table 65 Configuration > Network > Interface > Ethernet > Edit (continued)
LABEL DESCRIPTION
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