User guide

Packet Over SONET Module Installation and User Guide 2-11
Troubleshooting
Troubleshooting
This section describes how to isolate module-specific problems and determine when it
is appropriate to remove and replace a PoS module. This section includes information
on the following topics:
• Identifying Problem Categories on page 2-12
• Fixing Configuration Errors on page 2-13
• Upgrading the Switch Software Image on page 2-14
• Upgrading the PoS Module Software Image on page 2-14
• Fixing Power-Related Problems on page 2-15
• Fixing Link Down Problems on page 2-15
• Identifying Conditions for Replacing an I/O Module on page 2-16
The information in this section should be used in conjunction with the
“Troubleshooting” appendix in the ExtremeWare Software User Guide and the
release notes that accompanied your Extreme Networks product. If you
encounter a problem that is not discussed in one of these resources, contact
Extreme Networks technical support.