ZyXEL Communications NXC2500 User Manual page 109

Table 51 Configuration > Network > Interface > Ethernet > Edit (continued)
LABEL
DHCP
Relay Server 1
Relay Server 2
IP Pool Start
Address
Pool Size
First DNS
Server, Second
DNS Server,
Third DNS
Server
First WINS
Server, Second
WINS Server
Default Router
Lease time
Extended
Options
Add
NXC2500 User's Guide
DESCRIPTION
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.
Enter the IP address of a DHCP server for the network.
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.
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.
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.
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.
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.
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.
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.
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.
Click this to create an entry in this table. See
Chapter 8 Interfaces
Section 8.2.3 on page 111.
109