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Chapter 3
Device Management
To clear statistics for a specific WAN interface, type:
interfaces wan clearstatistics [ ddsName | t1e1Name | t3e3Name ] interface
Where:
• interface is the WAN interface
Section 3.23.5
Performing a Loopback Test
Loopback tests are a useful means of testing the T1/E1 hardware on the device and the T1/E1 connection with
remote devices. Three types of tests are available:
• Digital Loopback – RUGGEDCOM ROX II digitally sends frames and immediately returns them to the device.
This test is used to isolate problems within the T1/E1 circuit.
• Remote Loopback – RUGGEDCOM ROX II transmits frames to the Tx port and compares them with frames
received on the Rx port. A loopback plug or cable must be installed on the T1/E1 port. This test is used to
isolate problems within the WAN module.
• Line Loopback – RUGGEDCOM ROX II transmits frames across the T1/E1 line to a remote Channel Service
Unit/Data Service Unit (CSU/DSU). This test determines if a problem exists outside the device.
Regardless of the loopback type, a loopback test is successful if the frames received match those that were sent.
Missing frames and frames that contain discrepancies indicate a potential problem in the T1/E1 hardware or line.
To perform a loopback test on a WAN interface, do the following:
IMPORTANT!
Performing a loopback test on an active interface will immediately cause it to go down. However, the
trunk will be automatically initialized after the test is complete.
1.
Make sure a WAN interface has been configured. For more information, refer to
a WAN
Interface".
2.
Configure the following parameter(s) as required:
interfaces wan loopback duration time nloops loops phsyical-name interface type [ digital | line |
remote ]
Where:
• time is the number of seconds required to run the test
• loops is the number of loops
• interface is the name of the physical interface
The results are displayed when the test is complete.
Section 3.23.6
Configuring a T1 Line
To configure a T1 line for a WAN interface, do the following:
1.
Make sure the CLI is in Configuration mode.
2.
Navigate to interface » wan » {interface} » t1, where {interface} is the WAN interface.
136
RUGGEDCOM ROX II
CLI User Guide
Section 3.23.2, "Configuring
Performing a Loopback Test
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Table of Contents
Troubleshooting
