Troubleshooting guide

10-26
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 Gigabit Ethernet interface module physical
interface:
Step 1 Use the show controllers c8500 counters command to check the Gigabit Ethernet interface module
counters.
Switch# show controllers c8500 counters
Interface Input Runts Giants Input CRC Frame Output Output
State Packets Errors Packets Errors
-----------------------------------------------------------------------------
F0/0/0 U 0 0 0 0 0 0 349 0
F0/0/1 D 0 0 0 0 0 0 1 0
.
(Information Deleted)
.
G10/0/0 U 347 0 0 0 0 0 692 0
G10/0/1 U 346 0 0 0 0 0 347 0
.
(Information Deleted)
.
-----------------------------------------------------------------------------
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 Two-Port Enhanced Gigabit Ethernet Interface Modules
The two-port enhanced Gigabit Ethernet interface module supports 1000-Mbps multimode and
single-mode Layer 2 and Layer 3 fiber-optic connections. It consists of two one-port Gigabit Ethernet
port adapters attached to a carrier module. The port adapters are not hot-swappable, but the complete
interface module is hot-swappable. The port adapters have GBIC modular transceivers and SC-type fiber
connectors. The interface module is full-duplex, supports Fast EtherChannel operation, and provides
built-in ACL functionality. It is available with 16K, 64K, or 256K of routing table memory.
Note The port adapters within the two-port interface modules must have matching routing table memory.
That is, if the ATM OC-12c port adapter has 64K of routing table memory, the Gigabit Ethernet port
adapter must have 64K of routing table memory for the interface module to function properly.
Figure 10-2 is a block diagram of the enhanced Gigabit Ethernet interface module and shows how the
interface communicates with the switch fabric across the backplane.