ZyXEL Communications ISG50-ISDN User Manual page 274

Chapter 12 Interfaces
Table 78 Configuration > Network > Interface > Bridge > Edit (continued)
LABEL
Lease time
Enable IP/MAC
Binding
Enable Logs for
IP/MAC Binding
Violation
Static DHCP
Table
Add
Edit
Remove
#
IP Address
MAC
Description
Connectivity Check
Enable
Connectivity
Check
Check Method
Check Period
Check Timeout
Check Fail
Tolerance
Check Default
Gateway
Check this
address
Check Port
OK
Cancel
274
DESCRIPTION
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.
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.
Select this option to have the ISG50 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.
Configure a list of static IP addresses the ISG50 assigns to computers connected to the
interface. Otherwise, the ISG50 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 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 ISG50 stops routing to the gateway. The ISG50
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 ISG50 regularly ping the gateway you specify to make sure it
is still available.
Select tcp to have the ISG50 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 ISG50 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.
This field only displays when you set the Check Method to tcp. Specify the port
number to use for a TCP connectivity check.
Click OK to save your changes back to the ISG50.
Click Cancel to exit this screen without saving.
ISG50 User's Guide