ZyXEL Communications ENC User Manual page 298

Chapter 8 Application
Table 156 VLAN: Add (continued)
LABEL
First DNS
Server
Second DNS
Server
Third DNS
Server
First WINS
Server,
Second WINS
Server
Lease time
Static DHCP
Table
Add
Edit
Remove
#
IP Address
MAC Address
Description
Connectivity
Check
Enable
Connectivity
Check
Check
Method
Check Period
Check
Timeout
Check Fail
Tolerance
Check Default
Gateway
Check this
address
298
DESCRIPTION
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
NXC5200 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.
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.
Configure a list of static IP addresses the NXC assigns to computers connected to the
interface. Otherwise, the NXC assigns an IP address dynamically using the interface's IP
Pool Start Address and Pool Size.
Click this to create a new entry.
Select an entry and click this to be able to modify it.
Select an entry and click this to delete it.
This field is a sequential value, and it is not associated with a specific entry.
Enter the IP address to assign to a device with this entry's MAC address.
Enter the MAC address to which to assign this entry's IP address.
Enter a description to help identify this static DHCP entry. You can use alphanumeric and
()+/:=?!*#@$_%- characters, and it can be up to 60 characters long.
The NXC can regularly check the connection to the gateway you specified to make sure it
is still available. You specify how often to check the connection, how long to wait for a
response before the attempt is a failure, and how many consecutive failures are required
before the NXC stops routing to the gateway. The NXC resumes routing to the gateway the
first time the gateway passes the connectivity check.
Select this to turn on the connection check.
Select the method that the gateway allows.
Select icmp to have the NXC regularly ping the gateway you specify to make sure it is still
available.
Select tcp to have the NXC regularly perform a TCP handshake with the gateway you
specify to make sure it is still available.
Enter the number of seconds between connection check attempts.
Enter the number of seconds to wait for a response before the attempt is a failure.
Enter the number of consecutive failures before the NXC stops routing through the
gateway.
Select this to use the default gateway for the connectivity check.
Select this to specify a domain name or IP address for the connectivity check. Enter that
domain name or IP address in the field next to it.
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