Allied Telesis AT-S102 - Manual (Page 61)

Converteon Management Software User’s Guide
61
OAM Loopback Tests
OAM loopback tests are used to test the quality of the fiber optic
connection that serves as the link between two AT-CM Line Cards or
between a line card and another OAM-compliant device. The test consists
of a local line card in a managed chassis transmitting test packets from
Port A, the fiber optic port, to a remote line card, which transmits the
packets back to the local line card over the same fiber optic cable. As a
local line card receives its original test packets, it checks for lost packets
and for packets with errors, and displays the results in statistics counters.
Figure 7 illustrates a loopback test between two AT-CM Line Cards. The
test packets are generated by a line card in the AT-CV5000 Chassis at the
central office and are returned by a line card in the AT-CV1000 Chassis at
a remote site.
Figure 7. Loopback Test
For instructions, refer to “Performing the OAM Loopback Test” on
page 259.
Caution
Loopback tests are disruptive to network operations. The local and
remote line cards do not forward network traffic during the test.
Some network traffic may be lost.
FAN1
PS1
RDY
A T -CV5000
Remote AT-CM Line
Card in AT-CV1000
Chassis
AT-CV5000 Chassis
and AT-CV5M02
Management Card
Test packets
Local AT-CM Line Card