Troubleshooting guide

10-8
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 10 Troubleshooting Ethernet, ATM Uplink, and POS Uplink Interfaces
Troubleshooting 10/100 Ethernet Interface Modules
Connectivity Troubleshooting Commands
To troubleshoot a connectivity problem between a port and another port or end-station, use the following
commands:
Troubleshooting 10/100 Ethernet Interface Modules
This section describes specific processes and commands used to troubleshoot the 10/100BASE-T and
BASE-FX Ethernet interface modules.
The Catalyst 8500 CSR supports two different interface modules. The 10/100BASE-T Ethernet interface
module supports 100-Mbps Layer 2 or Layer 3 UTP connections. The 100BASE-FX Ethernet interface
module supports 100-Mbps Layer 2 or Layer 3 multimode fiber connections.
This section includes the following:
• 10/100BASE-T Interface Modules, page 10-8
• 100BASE-FX Interface Modules, page 10-9
• Displaying 10/100BASE-T and 100BASE-FX Interface Module Configurations, page 10-10
10/100BASE-T Interface Modules
The 10/100BASE-T Ethernet interface module supports 16 10-Mbps or 100-Mbps Layer 2 or Layer 3
unshielded twisted-pair (UTP) ports. This module supports full-duplex or half-duplex connections and
Fast EtherChannel operation. The 10/100BASE-T interface module is available with 16K or 64K of
memory. Routing tables use this memory.
Command Purpose
show interfaces {fastethernet | gigabitethernet}
card/subcard/port
Displays interface configuration, status, and
statistics.
show controllers {fastethernet | gigabitethernet}
card/subcard/port
Displays controller status for the specified
interface.
show epc if-entry interface {fastethernet |
gigabitethernet} card/subcard/port all
Displays all interface entry information for the
specific interface.
show epc ip-prefix interface {fastethernet |
gigabitethernet} card/subcard/port all-entries
Displays all ip prefix entries for the specified
interface.
show epc ip-address interface {fastethernet |
gigabitethernet} card/subcard/port all-entries
Displays all adjacent IP addresses for the
specified interface.
show epc patricia interface {fastethernet |
gigabitethernet} card/subcard/port ipucast detail
Displays IP unicast patricia tree for the specified
interface.
show epc patricia interface {fastethernet |
gigabitethernet} card/subcard/port mac detail
Displays the MAC patricia tree for the specified
interface.