Troubleshooting guide

E-9
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Appendix
Architecture Problems
• Interface module or single port failure:
– The show epc status command might display a failure in only a single port for a specific
interface module but all other ports on other interface modules display a status of “not Ok”. This
suggests a failure in just one port, and show epc queuing command might display the highest
count for the number of cells queued up.
– The show epc queuing command lists only ports from a single interface module, with
approximately 200+ cells queued. This suggests the failure is with this interface module. If
entering the show epc status command generates a display where the Status field lists “not Ok”
on a specific interface module and if the chassis is relatively “unpopulated”, this suggests that
all ports map back to even MSCs, in which case the failure could be at the switch processor
module in slot 5.
– The show epc queuing command lists many ports but, if most of these ports have X-INT
mapping to a single physical port (probably the port with the highest queued cell count), then
the problem could be that one port. If entering the show epc status command indicates a failure
on only one port, it is probably a failure on that one port.
Caution When troubleshooting for the cause of the port stuck problem, remember that this might be either a
software or hardware bug. You might not want to not immediately start replacing hardware at the first
sign of these symptoms.