Specifications

Chapter 4 Troubleshooting and Diagnostics Installation and Operation Manual
4-22 Diagnostic Functions MPW-1 MP-4100 Ver. 2.0
4. To activate (start) a loopback on a selected timeslot, select Loop Per Timeslot
on the Diagnostics > Physical Layer > I/O > Test Type screen, and then press
<Enter>.
5. You will see now the timeslot test selection screen. The screen includes the
list of timeslots of the selected port (link), presents information on the
destination of each timeslot and the traffic type, and in addition includes a
test selection field: when this field is selected, you have the option to
activate a Remote Loop.
6. At this stage, type T to activate the test.
7. To deactivate (stop) the loopback, select None for the timeslot, and then
type T to deactivate the test.
The other features related to loopback activation/deactivation described above
for the local loopback on timeslots are also applicable to the remote loopback.
Ping Test
MPW-1 modules installed in Megaplex-4100 can use the ping function, to check IP
connectivity between a MPW-1 packet port and the desired destination IP address
(that is, to a pseudowire peer). The user can select the destination IP address
and configure the number of ping packets sent. The port used to send the ping
packets is automatically selected, in accordance with the following criteria:
1. If the destination IP address is within the host IP subnet of the CL module,
the ping packets are sent by the CL module, and therefore use its IP address
as the source address.
2. If the destination IP address is not within the CL module subnet, but is within
the subnet of one of the router interfaces, the ping packets are sent by the
MPW-1 module associated with that router interface.
3. If the destination IP address is neither within the CL module subnet, nor
within a router interface, the ping packets are sent by the CL module using
the configured default gateway.
For the supervision terminal, use the following procedure to send pings to a
selected peer (for detailed instructions, refer to the
Megaplex-4100 Installation
and Operation Manual
):
1. Open the Diagnostics menu, and then select Ping Test.
2. On the Ping Test screen, select the following parameters:
 The desired destination IP address
 The number of ping packets (up to 50) to be sent. Pinging will be
automatically stopped after sending the specified number of ping
packets.
3. To start ping sending, select Send Ping, and then press <Enter>.
4. The prompt area at the bottom of the screen starts displaying the results of
each ping packet. After the selected number of packets, you will see the test
summary, which indicates the number of packets sent and received, and the
number of lost packets (packets not answered before the standard time-out
interval expires).