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Device flags : Present Running<br />

Interface flags: Point-To-Point SNMP-Traps 16384<br />

Link flags : Keepalives<br />

Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3<br />

Keepalive: Input: 0 (never), Output: 0 (never)<br />

LCP state: Conf-req-sent<br />

NCP state: inet: Down, inet6: Not-configured, iso: Not-configured, mpls:<br />

Not-configured<br />

CHAP state: Not-configured<br />

CoS queues : 8 supported<br />

Last flapped : 2005-05-26 10:21:08 PDT (00:00:07 ago)<br />

Input rate : 0 bps (0 pps)<br />

Output rate : 72 bps (0 pps)<br />

DS1 alarms : None<br />

DS1 defects : None<br />

Logical interface t1-0/0/3.0 (Index 69) (SNMP ifIndex 39)<br />

Flags: Hardware-Down Point-To-Point SNMP-Traps Encapsulation: PPP<br />

Protocol inet, MTU: 1500<br />

Flags: Protocol-Down<br />

Addresses, Flags: Dest-route-down Is-Preferred Is-Primary<br />

Destination: 10.0.13/24, Local: 10.0.13.1, Broadcast: 10.0.13.255<br />

The physical interface is marked Loopback: Remote. In addition, a number of fields in<br />

the logical interface section indicate that the T1 interface at the remote side of the<br />

link is down.<br />

Run the BERT test from operational mode. Because this is a T1 interface, use the<br />

t1-bert-start option. For other interfaces, use the test interface ? command to<br />

determine the proper option.<br />

The show interfaces extensive command shows the results of the BERT test. Here,<br />

the test is in progress:<br />

aviva@RouterF> show interfaces extensive t1-0/0/3 | find bert<br />

DS1 BERT configuration:<br />

BERT time period: 180 seconds, Elapsed: 96 seconds (in progress)<br />

Induced Error rate: 10e-0, Algorithm: 3 in 24, Repetitive (26)<br />

Bit count : 146557240<br />

Error bit count: 0<br />

...<br />

The following output shows the results of the completed test, which found no bit<br />

errors on the T1 link:<br />

aviva@RouterF> show interfaces extensive t1-0/0/3 | find bert<br />

DS1 BERT configuration:<br />

BERT time period: 180 seconds, Elapsed: 180 seconds (completed)<br />

Induced Error rate: 10e-0, Algorithm: 3 in 24, Repetitive (26)<br />

Bit count : 273186232<br />

Error bit count: 0<br />

...<br />

230 | Chapter 7: Router Interfaces<br />

This is the Title of the Book, eMatter Edition<br />

Copyright © 2008 O’Reilly & Associates, Inc. All rights reserved.

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