Chapter 9 Interfaces
USG20(W)-VPN Series User’s Guide
213
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 9.3.4 on page 166.
Edit Select an entry in this table and click this to modify it.
Remove Select an entry in this table and click this to delete it.
# This field is a sequential value, and it is not associated with any entry.
Name This is the option’s name.
Code This is the option’s code number.
Type This is the option’s type.
Value This is the option’s value.
Enable IP/MAC
Binding
Select this option to have this interface enforce links between specific IP addresses and
specific MAC addresses. This stops anyone else from manually using a bound IP
address on another device connected to this interface. Use this to make use only the
intended users get to use specific IP addresses.
Enable Logs for
IP/MAC Binding
Violation
Select this option to have the USG generate a log if a device connected to this interface
attempts to use an IP address that is bound to another device’s MAC address.
Static DHCP
Table
Configure a list of static IP addresses the USG assigns to computers connected to the
interface. Otherwise, the USG assigns an IP address dynamically using the interface’s
IP Pool Start Address and Pool Size.
Add Click this to create a new entry.
Edit Select an entry and click this to be able to modify it.
Remove Select an entry and click this to delete it.
# This field is a sequential value, and it is not associated with a specific entry.
IP Address Enter the IP address to assign to a device with this entry’s MAC address.
MAC Address Enter the MAC address to which to assign this entry’s IP address.
Description 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.
Connectivity Check The interface can regularly check the connection to the gateway you specified to make
sure it is still available. You specify how often the interface checks the connection, how
long to wait for a response before the attempt is a failure, and how many consecutive
failures are required before the USG stops routing to the gateway. The USG resumes
routing to the gateway the first time the gateway passes the connectivity check.
Enable
Connectivity
Check
Select this to turn on the connection check.
Check Method Select the method that the gateway allows.
Select icmp to have the USG regularly ping the gateway you specify to make sure it is
still available.
Select tcp to have the USG regularly perform a TCP handshake with the gateway you
specify to make sure it is still available.
Check Period Enter the number of seconds between connection check attempts.
Table 81 Configuration > Network > Interface > Bridge > Add / Edit (continued)
LABEL DESCRIPTION
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