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Troubleshooting Guide

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Table Of Contents
Cable connection problems
You can usually trace port connection problems to a poor cable connection or to an improper
connection of the port cables at either end of the link. To remedy such problems, make sure that the
cable connections are secure and that the cables connect to the correct ports at both ends of the
link. If you use homemade cables, ensure that the cables are wired correctly.
1000BASE-T cables
1 Gb/s ports operate using Category 5 UTP cabling only. Category 5 UTP cable is a two-pair cable.
To minimize crosstalk noise, maintain the twist ratio of the cable up to the point of termination;
untwist at termination cannot exceed 0.5 in. (1.27 cm).
SFP and SFP+ cables
Cables for the optical transceivers vary depending on the specific device type. For more information
about the cable requirements for Small Form Factor Pluggable (SFP) and SFP plus (SFP+), see
Installing Transceivers and Optical components on VSP Operating System Software, NN47227-301.
Alarm database
Avaya Virtual Services Platform 4000 Series contains a local alarms mechanism. Local alarms are
raised and cleared by applications running on the switch. View active alarms by using the show
alarm database command in the ACLI. Local alarms are an automatic mechanism run by the
system that do not require additional configuration.
Check local alarms regularly to ensure no alarms require additional attention. The raising and
clearing of local alarms also creates a log entry for each event. For more information about viewing
logs, see
Viewing Logs on page 58.
View the alarm database regularly to monitor alarm conditions, even if you do not observe a
performance problem. Review the alarm messages to determine if the system performs as
expected.
Not all alarm conditions indicate a problem so you must be familiar with expected behavior.
Example
The alarm database can show the following alarm text:
CP1 [01/01/70 00:03:06.796] 0x00010844 00000000 Global Router HW WARNING
USB found in slot 1 has VendorId 05dc ProductId a01a and Manufacturer
Lexar and did not match supported devices
This alarm means that you have tried to insert an unsupported USB into the USB slot. Only the USB
provided with your VSP 4000 system can be inserted into the USB slot.
Cable connection problems
January 2017 Troubleshooting 27
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