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
Using debug Commands
Caution Because debugging output is assigned high priority in the CPU process, it can render the system
unusable. For this reason, use debug commands only to troubleshoot specific problems or during
troubleshooting sessions with Cisco technical support staff. Moreover, it is best to use debug commands
during periods of lower network traffic and fewer users. Debugging during these periods decreases the
likelihood that increased debug command processing overhead will affect system use.
Along with the other debug commands supported on the Cisco ASR 1000 Series Aggregation Services
Routers, you can obtain specific debug information for SPAs on the Cisco ASR 1000 Series Routers
using the debug hw-module subslot privileged EXEC command.
The debug hw-module subslot command is intended for use by Cisco technical support personnel.
For information about other debug commands supported on the Cisco ASR 1000 Series Routers, refer
to the
Cisco IOS Debug Command Reference and any related feature documents for the applicable Cisco
IOS release.
Using show Commands
There are several show commands that you can use to monitor and troubleshoot the SIPs and SPAs on
the Cisco ASR 1000 Series Aggregation Services Routers. This chapter describes using the show
interfaces command to perform troubleshooting of your SPA.
For more information about show commands to verify and monitor SIPs and SPAs, see Chapter 5,
“Troubleshooting the SIP”, Chapter 10, “Configuring the Ethernet SPAs”, and the Cisco IOS technology
area command reference books.
Performing Basic Interface Troubleshooting
You can perform most of the basic interface troubleshooting using the show interfaces fastethernet,
show interfaces gigabitethernet, or show interfaces tengigabitethernet command and examining
several areas of the output to determine how the interface is operating.
The following example shows output from both the show interfaces gigabitethernet and show
interfaces tengigabitethernet commands with some of the significant areas of the output to observe
shown in bold:
Router# show interfaces gigabitethernet 2/0/1
GigabitEthernet2/0/1 is down, line protocol is down
Hardware is SPA-1X10GE-L-V2, address is 000a.f330.2e40 (bia 000a.f330.2e40)
Internet address is 2.2.2.1/24
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not supported
Full-duplex, 1000Mb/s, link type is force-up, media type is SX
output flow-control is on, input flow-control is on
ARP type: ARPA, ARP Timeout 04:00:00
Last input 03:18:49, output 03:18:44, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo

Cisco ASR 1000 Specifications

General

Brand	Cisco
Model	ASR 1000
Category	Network Router
Language	English