20
4.1.4 For Network Infrastructure
To test the transmission quality between two network locations that is connected by multiple network
equipments such as Ethernet Switches, Network Server, connect two ends of the network device to a pair
of NuBAR-1000. The figure below illustrates the transmission test between location A and B.
Note: NuBAR-1000 is test equipment of layer 2 packet. Devices that can not forward layer 2 (MAC based)
packet are not suitable for the test. Network such as Internet runs layer 3 protocols is not suitable for the
test. It is applicable for ADSL test for cable wiring business. The connection between CO (central office)
and the CPE (ADSL modem) apply layer 2 Ethernet.
4.1.5 For Mesh Network
As the rotary function switch introduced above, NuBAR-1000 is able to do mesh connection test. Lord
sends test packets to the 1
st
Servant, then the 1
st
Servant forward packets to 2
nd
Servant. Repeat the
procedure until the packets returns to Lord finally.
The application below applies to six locations of network infrastructure.
4.1.6 For Loopback Test
The Loopback test for NuBAR-1000 can be divided into 2 kinds. One is the loopback test by a pair of
NuBAR-1000 and the other is loopback test with other network device (packet generator).
By a pair of NuBAR-1000
Work with other network device (packet generator)
A
B
Servant
Lord