1-12
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 1 General Troubleshooting
1.2.2 Perform a Terminal Loopback on a Source-Node Optical Port
Step 3
If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Clear the
terminal loopback state on the port:
a.
Double-click the ASAP in the source node.
a.
Click the
Maintenance > Optical > Loopback > Port
tabs.
b.
Choose the appropriate state (
Unlocked
;
Locked,disabled
;
Locked,maintenance
;
Unlocked,automaticInservice
) from the Admin State column for the port being tested. If multiple
ports are available, select the appropriate row for the desired port. (The new administrative state will
override the loopback.)
c.
Click
Apply
.
d.
Click
Yes
in the confirmation dialog box.
Step 4
Clear the terminal loopback circuit:
a.
Click the
Circuits
tab.
b.
Choose the loopback circuit being tested.
c.
Click
Delete
.
d.
Click
Yes
in the Delete Circuits dialog box. Do not check any check boxes.
Step 5
Complete the
“Test the ASAP Card” procedure on page 1-12
.
Test the ASAP Card
Step 1
Determine whether you are experiencing trouble on a single SFP (PPM), on all PPMs within a
4PIO (PIM), or on all 4PIO used in that ASAP card. If there is only partial failure, you might be able to
replace this part rather than the entire card.
Step 2
If the errors are being observed on one port but not all ports of the ASAP, you might only need to replace
that SFP (PPM). Remove the errored SFP (PPM) and replace it with a known-good SFP (PPM) by
completing the procedures for this in the “Install Cards and Fiber-Optic Cable” chapter of the
Cisco ONS 15600 SDH Procedure Guide
.
Step 3
If all SFPs (PPMs) on a particular 4PIO (PIM) are experiencing problems, the 4PIO (PIM) is indicated.
Remove this 4PIO (PIM) and replace it with a known-good one using the procedures for this in the
“Install Cards and Fiber-Optic Cable” chapter of the
Cisco ONS 15600 SDH Procedure Guide
.
Step 4
If the trouble still is not located, complete the
“Replace an I/O Card” procedure on page 2-134
for the
suspected bad ASAP card and replace it with a known-good one.
Step 5
Resend test traffic on the loopback circuit with a known-good card.
Step 6
If the test set indicates a good circuit, the problem was probably the defective card. Return the defective
card to Cisco through the RMA process. Contact Cisco Technical Support (1 800 553-2447).
Step 7
Complete the
“Replace an I/O Card” procedure on page 2-134
for the defective card.
Step 8
Clear the terminal loopback on the port before testing the next segment of the network circuit path:
a.
Double-click the ASAP card in the source node with the terminal loopback.
a.
Click the
Maintenance > Optical > Loopback > Port
tabs.
Содержание Cisco ONS 15600 SDH
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