JUNOS Internet Software Network Operations Guide: Hardware
188 ! Checking the PIC Status
The interface is configured with a /32 subnet. If you configure the interface with a
different subnet, the output will be different.
For more detailed information about monitoring interfaces, see the JUNOS Network
Interfaces and Class of Service Configuration Guide.
Alternative Actions To view more detailed information about a particular interface, use the show
interfaces interface-name brief
command. The command output shows the interface
status, link-level type, loopback, device flags, interface flags, keepalive settings,
keepalive input, active alarms, and defects.
To view interface status information, use the
show interface descriptions command.
This command displays the interface status and the description given when
configured on the router.
Syntax show interfaces terse <interface-name>
show interfaces <interface-name> brief
Step 3: Check the PIC LED States
For PICs that have a physical port, the LEDs indicate the status of the physical link.
If the LED is green, the physical link is up. If the LED is red or amber, the physical
link is down. Usually, when the LED is red, the receive port is not receiving a signal.
If the LED is amber, the receive port is getting a remote alarm from the device.
For PICs with no physical port, such as a tunnel or encryption PIC, the LED
indicates the status of the PIC.
The Tunnel PIC, which has no ports, has a single LED. Each LED has four different
states, described in Table 50.
Table 50: Tunnel PIC LEDs
For M7i and M10i routers, most PICs have an LED labeled STATUS on the PIC
faceplate. Some PICs have additional LEDs, often one per port. The meaning of the
LED states differs for various PICs. For more information, see the appropriate
router PIC guide.
Color State Description
Red Fail The FPC has detected a PIC failure.
Green Normal The port is functioning normally.
Amber Problem detected;
still functioning
To track the problem, use the CLI.
None Not enabled The port is not enabled or the PIC is
offline.
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