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8. Troubleshooting
8-2
September 2002 9128-A2-GB20-80
Physical Tests
on page 8-26
—
Line Loopback
—
Payload Loopback
—
Repeater Loopback
—
DTE Loopback
—
Send Line Loopback
—
Data Channel Loopbacks on a Frame Relay Link
—
Send Remote Line Loopback
—
Send and Monitor Pattern Tests
IP Ping Test
on page 8-35
Lamp Test
on page 8-40
Problem Indicators
The unit provides a number of indicators to alert you to possible problems:
Indicators . . . See . . .
LEDs
Viewing LEDs and Control Leads
and
LED Descriptions
in
Chapter 7,
Operation and Maintenance
, as well as the user
interface screen.
Main Menu
→
Status
→
Display LEDs and Control LEDs
Health and Status Table 7-8, Health and Status Messages, in Chapter 7,
Operation and Maintenance
.
Main Menu
→
Status
→
System and Test Status
Messages also appear at the bottom of any menu-driven
user interface screen.
Performance statistics
Performance Statistics
in Chapter 7,
Operation and
Maintenance
, to help you determine how long a problem
has existed.
Alarm conditions that will
generate an SNMP trap
Alarms
on page 8-7.
SNMP traps Appendix B,
SNMP MIBs and Traps, and RMON Alarm
Defaults.
Traps supported include warm-start, authentication-failure,
enterprise-specific (those specific to the unit), link-up, and
link-down.