ZyXEL Communications NXC2500 User Manual page 121

Table 59 Configuration > Network > Interface > Ethernet > Edit (continued)
LABEL DESCRIPTION
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 Enter the IP address from which the NXC begins allocating IP addresses. If you want to
Address
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 Specify the IP addresses up to three DNS servers for the DHCP clients to use. Use one
Server, Second
of the following ways to specify these IP addresses.
DNS Server,
Third DNS
Custom Defined - enter a static IP address.
Server
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 Type the IP address of the WINS (Windows Internet Naming Service) server that you
Server, Second
want to send to the DHCP clients. The WINS server keeps a mapping table of the
WINS Server
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 This table is available if you selected DHCP server.
Options
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
Chapter 8 Interfaces
NXC Series User's Guide
121
Section 8.2.4 on page 124.