Juniper T640 Hardware Guide

Table 94: SCG Alarm Messages
CLI MessageLCD MessageAlarm Type
RED ALARM—SCG SCG-number
Failure
REDALARM—SCGSCG-number
Failure
Red
RED ALARM—No SCG OnlineRED ALARM—No SCG Online
RED ALARM—SCG
SCG-numberVolt Sensor Fail
RED ALARM—SCG
SCG-numberVolt Snsr Fail
RED ALARM—SCG
SCG-numberExternal-A LOS
RED ALARM—SCG
SCG-numberExt-A LOS
RED ALARM—SCG
SCG-numberExternal-B LOS
RED ALARM—SCG
SCG-numberExt-B LOS
RED ALARM—SCG
SCG-numberInternal Clock
Failure
RED ALARM—SCG
SCG-numberINT CLK Fail
YELLOW ALARM—SCG
SCG-number Not Online
YELLOW ALARM—SCG
SCG-number Not Online
Yellow
YELLOW ALARM—SCG
SCG-number Removed
YELLOW ALARM—SCG
SCG-number Removed
YELLOW ALARM—SCG
SCG-numberTemp Sensor Fail
YELLOW ALARM—SCG
SCG-numberTmpSnsr Fail
Solution To troubleshoot the SCGs:
1. Check the LEDs on the faceplate of each SCG and on the craft interface.
2. Use the CLI to check for alarms.
• Standalone router—Issue the show chassis alarms command to view the alarms.
• Router in a routing matrix—Issue the show chassis alarms lcc lcc-number command
to view the alarms.
Related
Documentation
T640 SONET Clock Generators (SCGs) LEDs on page 28•
• T640 SONET Clock Generators (SCGs) Description on page 27
Troubleshooting the T640 Cooling System
Problem Description:
469Copyright © 2017, Juniper Networks, Inc.
Chapter 33: Troubleshooting Components

Juniper T640 Specifications

General

Brand	Juniper
Model	T640
Category	Network Router
Language	English