Troubleshooting guide

10-14
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 10 Troubleshooting Ethernet, ATM Uplink, and POS Uplink Interfaces
Troubleshooting Gigabit Ethernet Interface Modules
Follow these steps to troubleshoot the counters of the Fast Ethernet interface module physical interface:
Step 1 Use the show controllers c8500 counters command to check the Fast Ethernet interface module
counters.
Switch# show controllers c8500 counters
Interface Input Runts Giants Input CRC Frame Output Output
State Packets Errors Packets Errors
-----------------------------------------------------------------------------
G0/1/0 U 0 0 0 0 0 0 136972 0
G0/1/1 U 0 0 0 0 0 0 20 0
P1/0/0 AD 0 19600630 2271017 3 0 0 0
P2/0/0 AD 0 2 0 139 2 0 0 0
G2/0/1 AD 1 0 0 0 0 0 1 0
A3/0/0 AD 0 0 0 0 0 0 0 0
G3/0/1 AD 1 0 0 0 0 0 1 0
F9/0/0 U 14364 0 0 0 0 0 14367 0
F9/0/1 AD 1 0 0 0 0 0 1 0
F9/0/2 AD 1 0 0 0 0 0 1 0
F9/0/3 AD 1 0 0 0 0 0 1 0
F9/0/4 AD 1 0 0 0 0 0 1 0
F9/0/5 AD 1 0 0 0
.
(Information Deleted)
.
A12/0/0 AD 0 0 0 0 0 0 0 0
G12/0/1 AD 1 0 0 0 0 0 1 0
-----------------------------------------------------------------------------
AD - Admin Down, D - Down, F - Fail, U - Up
Switch#
Step 2 Check the Interface State field. It should indicate the interfaces are up.
Step 3 Check the Input Packets and Output Packets fields. The show controllers c8500 counters command
should be entered at least twice. The counters in the Input Packets and Output Packets fields should be
incrementing. This information can also be displayed using the show interfaces command.
Note The clear counters command does not clear the show controllers c8500 counters command display.
If you determine that the interface is configured incorrectly, refer to the “Configuring Interfaces” chapter
in the Layer 3 Switching Software Feature and Configuration Guide.
Troubleshooting Gigabit Ethernet Interface Modules
This section describes specific processes and commands used to troubleshoot the Gigabit Ethernet
interface modules.
The Catalyst 8500 CSR supports three different interface modules for Gigabit Ethernet transmission
over fiber connections: the eight-port Gigabit Ethernet interface module, the two-port Gigabit Ethernet
interface module, and the two-port enhanced Gigabit Ethernet interface module.