Specifications

Chapter 6 Troubleshooting and Diagnostics Installation and Operation Manual
6-22 Testing RICi-622GE RICi-622GE Ver. 1.0
Fault/Problem Probable Cause Remedial Action
Ethernet service
problems
(End-to-End loss
of Ethernet
frames)
Physical layer
problems
1. Check SDH/SONET statistics.
2. Follow remedial action described in SDH/SONET ON LINE LED is off
and SDH/SONET ON LINE LED blinks.
3. Check Ethernet statistics. Late collisions may result with different
duplex modes in RICi-622GE and Ethernet switch/device.
4. Check rate, duplex, and autonegotiation in RICi-622GE and Ethernet
device. CRC errors may indicate range/cable problems.
6.4 Testing RICi-622GE
You can test RICi-622GE in the following ways:
• Perform remote or local diagnostic loopback
• Ping a remote host
• Trace route to a remote host.
Running Diagnostic Loopbacks
RICi-622GE supports two loopback types:
• Remote loopback that tests the connection between the STM-4/OC-12 ports
and the SDH/SONET network. In this test, data coming from the SDH/SONET
network is looped back to the SDH/SONET network (see
Figure 6-21 ).
• Local loopback that tests the STM-4/OC-12 port function. In this test, data
coming from the port is looped back to the port (see
Figure 6-22 ).
The local and remote loopbacks are closed in the framer.
Figure 6-21. Remote Loopback
Figure 6-22. Local Loopback