ZyXEL Communications UAG4100 User Manual page 121

Table 51 Configuration > Network > Interface > Ethernet > Edit (continued)
LABEL DESCRIPTION
MTU Maximum Transmission Unit. Type the maximum size of each data packet, in bytes, that
can move through this interface. If a larger packet arrives, the UAG divides it into
smaller fragments. Allowed values are 576 - 1500. Usually, this value is 1500.
Connectivity Check These fields appear when Interface Type is external.
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 UAG stops routing to the gateway. The UAG resumes
routing to the gateway the first time the gateway passes the connectivity check.
Enable Select this to turn on the connection check.
Connectivity
Check
Check Method Select the method that the gateway allows.
Select icmp to have the UAG regularly ping the gateway you specify to make sure it is
still available.
Select tcp to have the UAG 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.
Check Timeout Enter the number of seconds to wait for a response before the attempt is a failure.
Check Fail Enter the number of consecutive failures before the UAG stops routing through the
Tolerance
gateway.
Check Default Select this to use the default gateway for the connectivity check.
Gateway
Check this Select this to specify a domain name or IP address for the connectivity check. Enter
address
that domain name or IP address in the field next to it.
Check Port This field only displays when you set the Check Method to tcp. Specify the port
number to use for a TCP connectivity check.
DHCP Setting This section appears when Interface Type is internal.
DHCP Select what type of DHCP service the UAG provides to the network. Choices are:
None - the UAG does not provide any DHCP services. There is already a DHCP server
on the network.
DHCP Relay - the UAG routes DHCP requests to one or more DHCP servers you specify.
The DHCP server(s) may be on another network.
DHCP Server - the UAG assigns IP addresses and provides subnet mask, gateway, and
DNS server information to the network. The UAG is the DHCP server for the network.
These fields appear if the UAG 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 UAG is a DHCP Server.
IP Pool Start Enter the IP address from which the UAG 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 UAG 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.
Chapter 10 Interfaces
UAG4100 User's Guide
121