Cisco ASR 1000 Series Software Configuration Guide

SolutionPossible ProblemStatus Line Condition
in the local router.
7
If you suspect faulty router
hardware, change the serial line
to an unused port. If the
connection comes up, the
previously connected interface
has a problem.
First enable per-interface
debugging using the
command debug interface
serial x, and depending on
the encapsulation, enable
the corresponding debug:
For HDLC: debug serial
interface For PPP: debug
ppp negotiation For FR:
debug frame-relay lmi
Note
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.
Caution
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS XE
Everest 16.5
OL-14127-17 329
Troubleshooting the Serial SPAs
Serial Lines: show interfaces serial Status Line Conditions

Cisco ASR 1000 Series Specifications

General

Brand	Cisco
Model	ASR 1000 Series
Category	Network Router
Language	English