Juniper MX2010, Руководство по оборудованию, Страница: 718 / 825

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Alarm devices connected to the alarm relay contact—When a red or yellow alarm occurs, it trips the
corresponding alarm relay.
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CLI—The CLI is the primary tool for controlling and troubleshooting hardware, Junos OS, routing protocols,
and network connectivity. CLI commands display information about routing tables, information specific
to routing protocols, and information about network connectivity derived from the ping and traceroute
utilities.
You enter CLI commands on one or more external management devices connected to ports on the Routing
Engine.
For information about using the CLI to troubleshoot Junos OS, see the appropriate Junos OS configuration
guide.
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JTAC—If you need assistance during troubleshooting, you can contact the Juniper Networks Technical
Assistance Center (JTAC) by using the Web or by telephone. If you encounter software problems, or
problems with hardware components not discussed here, contact JTAC.
Chassis and Interface Alarm Messages
When the Control Board and Routing Engine (CB-RE) detects an alarm condition, it lights the red or yellow
alarm LED on the craft interface as appropriate, trips the alarm relay, and reports the cause of the alarm
in the craft interface. To view a more detailed description of the alarm cause, issue the show chassis alarms
command:
user@host>
show chassis alarms
There are two classes of alarm messages:
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Chassis alarms indicate a problem with a chassis component such as the cooling system or power system.
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Interface alarms indicate a problem with a specific network interface.
Alarm Relay Contacts
The craft interface has two alarm relay contacts for connecting the router to external alarm devices.
Whenever a system condition triggers either the red or yellow alarm on the craft interface, the alarm relay
contacts are also activated. The alarm relay contacts are located on the upper right of the craft interface.
Craft Interface LEDs
The craft interface displays system status messages and enables you to troubleshoot the MX2010 router.
The craft interface is located on the upper front of the router and contains LEDs for the router components,
the alarm relay contacts, and alarm cutoff button.
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