Cisco ASR 1000 Configuration Guide

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Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide
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Chapter 11 Troubleshooting the Gigabit Ethernet SPAs
Performing Basic Interface Troubleshooting
To verify that your interface is operating properly, complete the steps in Table 11-1:
For more information about the verification steps and possible responses to correct detected problems,
see the following sections:
• Verifying the Interface Is Up, page 11-4
• Verifying the Line Protocol Is Up, page 11-5
• Verifying the CRC Counter, page 11-5
• Verifying the Carrier Signal, page 11-5
Verifying the Interface Is Up
In the output from the show interfaces gigabitethernet, show interfaces tengigabitethernet, or show
interfaces fastethernet command, verify that the interface is up. If the interface is down, perform the
following corrective actions:
• If the interface is administratively down, use the no shutdown interface configuration command to
enable the interface.
• Be sure that the cable is fully connected.
• Verify that the cable is not bent or damaged. If the cable is bent or damaged, the signal will be
degraded.
Ta b l e 11-1 Basic Interface Troubleshooting Steps
Action Example
Step 1
From global configuration mode, enter the
show interfaces gigabitethernet, show
interfaces tengigabitethernet, or show
interfaces fastethernet command.
Router# show interfaces gigabitethernet 2/0/1

Router# show interfaces tengigabitethernet 7/0/0
Router# show interfaces fastethernet 3/0/0
Step 2
Verify that the interface is up.
Router# show interfaces gigabitethernet 2/0/1
GigabitEthernet2/0/1 is up, line protocol is up
Router# show interfaces tengigabitethernet 7/0/0
TenGigabitEthernet7/0/0 is up, line protocol is up
(connected)
Router# show interfaces fastethernet 3/0/0
FastEthernet3/0/0 is up, line protocol is up
Step 3
Verify that the line protocol is up.
Router# show interfaces gigabitethernet 2/0/1
GigabitEthernet2/0/1 is up, line protocol is up
Router# show interfaces tengigabitethernet 7/0/0
TenGigabitEthernet7/0/0 is up, line protocol is up
(connected)
Router# show interfaces fastethernet 3/0/0
FastEthernet3/0/0 is up, line protocol is up
Step 4
Observe the CRC counter.
0 input errors, 0 CRC, 0 frame, 130043940 overrun, 0
ignored
Step 5
Observe the carrier signal counters.
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out

Cisco ASR 1000 Specifications

General

Brand	Cisco
Model	ASR 1000
Category	Network Router
Language	English