Cisco uBR10012 Troubleshooting Manual page 59

Universal broadband router

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Table of Contents

Chapter 4

Troubleshooting Line Cards

Table 4-4

Fault Type

The show controllers clock-reference command

displays compare errors between the two TCC+

cards installed in the Cisco uBR10012 router.

The show controllers command for a cable

interface displays the message "Timestamp is

from local oscillator." This command should

show that the timestamp is coming either from an

external source or from the TCC+ card.

OL-1237-01

TCC+ Card Faults and Recommended Responses

Response

If this occurs at system startup or only occasionally at other times,

this error can be ignored, because the system typically records a

slight delay when the TCC+ cards synchronize with each other. These

initial compare errors can be ignored and cleared with the cable

clock clear-counters command.

If this error repeatedly occurs, it could indicate a hardware problem

with one of the TCC+ cards. Try replacing each card to see if the

problem disappears.

Verify that at least one TCC+ card is installed in the chassis. If not,

install a TCC+ card.

Verify that a valid national clock source, such as a GPS receiver or

BITS clock, is plugged into the TCC+ card's RJ-45 connector.

Replace the TCC+ card.

Cisco uBR10012 Universal Broadband Router Troubleshooting Guide

Troubleshooting the Timing, Communication, and Control Plus Card

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Troubleshooting