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ERX 8.0.x Hardware Guide
Table 11: LED Identification and Activity Descriptions (continued)
LED Location LED Label LED Indicator LED Color OFF to ON ON to OFF
LINK
Ethernet
Green
Ethernet link up Ethernet link
down
Ethernet line
modules
ACTIVITY
Ethernet
Green
Blinks when
Ethernet traffic
on link
No Ethernet tr
affic
on link
SYNC
Port status
Green
If the port is
configured as
DTE, the LED
lights when both
the DCE and the
clock source are
available.
If the port is
configured as
DCE, the LED
lights when the
DTE is available.
If the port i s
configured as DTE,
the LED goes out
when either the
DCE or the clock
source becomes
unavailable.
If the port i s
configured as
DCE, the LED
goes out when
the DTE becomes
unavailable.
YEL ALM
NOTE: This LED is not functional on the HSSI line module.
HSSI line module
RED ALM
Port status
Red If the port is
configured as DTE,
the LED lights
when either the
DCE or the clock
source becomes
unavailable.
If the port is
configured as
DCE, the LED
lights when the
DTE becomes
unavailable.
If the port i s
configured as
DTE, the LED goes
out when both
the DCE and the
clock source are
available.
If the port i s
configured as
DCE, the LED goes
out when the DTE
is available.
106 Understanding Status LEDs to Troubleshoot