1-16
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 1 General Troubleshooting
1.2.4 Perform a Facility Loopback or Payload Loopback on an Intermediate-Node Optical Port
b.
In the
Set Preferred
drop-down menu, select the alternate copy. (For example, if Copy B is
preferred and in use, select Copy A.)
c.
Click
Apply
.
d.
Click
Yes
on the confirmation dialog box.
Note
If you attempt a preferred copy switch and the switch is unsuccessful, a problem is present
with the alternate SSXC.
e.
Click
Refresh
until the tab shows that the alternate copy you selected is now the preferred copy. The
Currently Used field will show the newly selected preferred copy.
Step 2
Resend test traffic on the loopback circuit.
Step 3
If the test set indicates a faulty circuit, the problem is probably the defective card. Return the defective
card to Cisco through the RMA process. Contact Cisco Technical Support (1 800 553-2447) and proceed
to
. If the circuit is not shown to be faulty and the card is not shown to be defective, you are
finished with testing.
Step 4
Complete the
“Replace an SSXC Card” procedure on page 2-133
for the defective card. Perform
.
Step 5
If the test set indicates a good circuit, the cross-connect card might have had a temporary problem that
was cleared by the side switch. Clear the XC loopback circuit:
a.
Click the
Circuits
tab.
b.
Choose the XC loopback circuit being tested.
c.
Click
Delete
.
d.
Click
Yes
in the Delete Circuits dialog box. Do not check any check boxes.
Step 6
Complete the
“1.2.4 Perform a Facility Loopback or Payload Loopback on an Intermediate-Node
Optical Port” procedure on page 1-16
.
1.2.4 Perform a Facility Loopback or Payload Loopback on an
Intermediate-Node Optical Port
Performing an STM-16 or ASAP card optical facility loopback (or STM-64 payload loopback) on an
intermediate port isolates whether this node is causing circuit failure. In the situation shown in
, the test is being performed on an intermediate STM-N port.
Figure 1-9
Facility Loopback Path to an Intermediate-Node STM-N Port
Destination
ONS Node
STM-N
STM-N
XC
Source
ONS Node
Intermediate
ONS Node
STM-N
STM-N
XC
Test Set
STM-N
XC
STM-N
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Содержание Cisco ONS 15600 SDH
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