User's Manual

UTT Technologies Chapter 6 Basic Setup
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disabled. Note that when performing ARP request test, the detection target IP should
be the gateway IP address; and you cannot perform ARP request test on a PPPoE
Internet connection.
3. The DNS method applies to a network environment in which the Internet connection
is connected always, but the access time is restricted by the ISP. Note that when
performing DNS query test, the detection target IP should be an appropriate public
DNS server IP address; and it is suggested that you use your ISP¶s DNS server IP
address. Moreover, you cannot choose any DNS server used by the LAN hosts as the
detection target; otherwise, those LAN hosts can only use the current Internet
connection to access the Internet, but cannot use other Internet connections.
4. As a PPPoE connection automatically uses LCP (link control protocol) echo
mechanism to validate link availability, the Device will not use ICMP, ARP or DNS
method to monitor the PPPoE Internet connection by default (its Detection Interval is
set to 0). If needed, the Device can perform ICMP echo or DNS query test on the
PPPoE connection in addition to LCP echo mechanism, but the detection target
cannot be the default gateway when choosing ICMP method.
6.3.2 The Operation Principle of Load Balancing
No matter what Load Balancing Mode you choose, as long as there are more than one
primary Internet connections, the Device will implement load balancing among these
connections. The following sections describe the operation principle and the
characteristics of load balancing feature.
6.3.2.1 Allocating Traffic according to Connection Bandwidth
On the Device, it allows you designate the ratio of traffic that will be allocated to each
Internet connection in advance. You can achieve this by specifying the Internet
connection¶s Weight, the connection that has larger Weight will take more traffic than the
connection that has smaller Weight.
In most cases, to properly allocate traffic, you may
specify
each connection¶V Weight according to the ratio of each connection¶s bandwidth.
For example, we assume that a business has four Internet connections: connection A,
connection B, connection C, and connection D. Their bandwidths are 10M, 6M, 4M and
4M respectively. There are two cases:
Ɣ In the case of Full Load Balancing, as all of the four Internet connections are used
as primary connections, we PD\ VHW HDFK FRQQHFWLRQ¶V Weight to 5, 3, 2, and 2