User's Manual

UTT Technologies Chapter 6 Basic Setup
http://www.uttglobal.com Page 104
Ɣ ARP: The Device will monitor an Internet connection by sending ARP request
packets to the connection¶s default gateway IP address.
Ɣ DNS: The Device will monitor an Internet connection by sending DNS query packets
to the public DNS server IP address you specify.
The following table describes detection target IP supported by each detection method,
and the restriction of using each detection method. Therein, Gateway IP Address
indicates the IP address of the Internet connection¶s default gateway; Other IP Address
indicates an appropriate public IP address except gateway IP address.
Detection Method Detection Target IP Description
ICMP
Gateway IP Address
The detection target IP can be either the gateway IP
address or other public IP address.
Other IP Address
ARP Gateway IP Address
The detection target IP should be the gateway IP
address. You cannot perform ARP request test on a
PPPoE Internet connection.
DNS Other IP Address
The detection target IP should be a public DNS
server¶s IP address.
Table 6-4 Detection Method and Detection Target IP
In practice, it is suggested that you choose a detection method according to the following
points:
1. As ICMP method has high sensitivity and accuracy, it is suggested that you choose
ICMP method to perform ICMP echo test (Ping) on the Internet connection. In most
cases, please use the connection¶s default gateway IP address as the detection
target IP; but if ping response is disabled on the default gateway, you should choose
other appropriate public IP address as the detection target IP.
2. The ARP method applies to a network environment in which ping response is