Cisco ONS 15454 Troubleshooting Manual page 136

1.5.8 Perform a Hairpin Test on a Destination-Node Ethernet Port
d.
e.
Complete the
Step 4
Test the Standby Cross-Connect Card
Two cross-connect cards (active and standby) must be in use on a node to use this procedure.
Note
Perform a reset on the standby cross-connect card to make it the active card:
Step 1
a.
b.
c.
d.
Initiate an external switching command (side switch) on the cross-connect cards before you retest the
Step 2
loopback circuit:
Caution Cross-connect side switches, with the exception of side switches using XC-VXC-10G cards, are
service-affecting. Any live traffic on any card in the node endures a hit of up to 50 ms. XC-VXC-10G side
switches are errorless.
a.
b.
c.
d.
Step 3 Resend test traffic on the loopback circuit.
The test traffic now travels through the alternate cross-connect card.
If the test set indicates a faulty circuit, assume the cross-connect card is not causing the problem. Clear
Step 4
the hairpin circuit:
a.
b.
c.
Cisco ONS 15454 Troubleshooting Guide, R8.5
1-92
Click Yes in the Delete Circuits dialog box. Do not check any check boxes.
Confirm that the hairpin circuit is deleted from the Circuits tab list.
"Test the Standby Cross-Connect Card" procedure on page
Determine the standby cross-connect card. On both the physical node and the CTC node view
window, the standby cross-connect ACT/SBY LED is amber and the active card ACT/SBY LED is
green.
Position the cursor over the standby cross-connect card.
Right-click and choose RESET CARD.
Click Yes in the confirmation dialog box.
Determine the standby cross-connect card. On both the physical node and the CTC node view
window, the standby cross-connect ACT/SBY LED is amber and the active card ACT/SBY LED is
green.
In the node view, select the Maintenance > Cross-Connect > Cards tabs.
In the Cross-Connect Cards area, click Switch.
Click Yes in the Confirm Switch dialog box.
Note After the active cross-connect goes into standby mode, the original standby card becomes
active and its ACT/SBY LED turns green. The former active card becomes standby and its
ACT/SBY LED turns amber.
Click the Circuits tab.
Choose the hairpin circuit being tested.
Click Delete.
Chapter 1 General Troubleshooting
1-92.
November 2009